G633 is a light-to-medium grey granite quarried in Fujian Province, China, and sold internationally under the trade name Mist Grey Granite. Buyers searching for China G633 or grey granite G633 are looking for the same material. Inside China it also moves under a second name, G633 Grey, and buyers occasionally see it listed as China Mist Grey or Light Grey G633 depending on which trading company is doing the listing.
This page is written for importers, distributors, fabricators and monument wholesalers who are evaluating G633 as a material to buy in container volumes. It covers what the stone actually is, how to read a G633 specification, what forms it is available in, how to verify quality before you pay, and the practical mechanics of ordering from a Chinese supplier.
If you are a homeowner looking for a fabricator to install a kitchen counter, this is not the right page — G633 moves in slabs and blocks, not installed jobs.
What Is G633 Granite?
G633 is a granite in the commercial sense of the word: an igneous rock with a visibly crystalline structure, hard enough to take a polish, and consistent enough in colour to be sold as a named grade. It is not a rare material. It is one of the workhorse greys in the Chinese granite export catalogue, sitting alongside G603 (Padang Cristallo) and G654 (Padang Dark) in the same product family.
Colour and Appearance
G633 reads as a cool grey with a fine, even grain. In dried, polished slab the base tone sits in the light-to-medium grey band; in the flamed or bush-hammered finishes used for paving it goes noticeably lighter, because the textured surface scatters light instead of reflecting it.
The grain is fine rather than coarse. That matters more than it sounds. A fine-grained granite shows less variation between slabs, which means a project using G633 across a large elevation will look more uniform than the same area clad in a coarse-grained grey. It also means the material does not flatter heavy veining — G633 has almost no veining, which is either a feature or a limitation depending on what you are specifying.
Two things consistently surprise first-time buyers:
G633 looks lighter after installation than it does in the sample. Wet stone reads darker than dry stone, and stone photographed in a factory with directional lighting reads differently again. Ask for a photo of the actual slab in daylight before committing to a large order, particularly for a project where multiple elevations must match.
Colour varies between quarry blocks. G633 is quarried in multiple pits and multiple blocks within a pit. The grey band shifts. This is normal for granite and not a defect, but it is the single most common source of dispute between importer and supplier. The control mechanism is discussed under Grades and Quality Standards below.
How G633 Differs From G603 and G654
These three codes get confused constantly, and getting the wrong one wastes a container. The short version:
- G603 (Padang Cristallo) is a light grey with a slightly warm cast. It is the lightest of the three and the most commonly specified for large facade areas where a lighter, less institutional look is wanted.
- G633 (Mist Grey) sits in the middle. Cooler in tone than G603, lighter than G654.
- G654 (Padang Dark) is a dark grey that reads almost black when wet or polished. It is the most specified of the three for paving, kerbstones and monument work, largely because dark stone hides dirt and weather marking better in exterior applications.
If you are matching an existing installation, order the physical sample rather than working from photographs or descriptions. Greys are the hardest family of natural stone to match across photographs, and screen calibration varies between devices.
Quarry Origin and Batch Consistency
G633 is a Fujian granite. Fujian has been the centre of China's granite export industry for decades, and the practical consequence for a buyer is that supply is deep: multiple independent factories cut G633, so lead times are short and the material is not hostage to a single quarry's output.
The trade-off is that "G633" describes a colour band, not a single geological deposit. Two factories cutting G633 may be cutting from different quarry blocks. This is why the consistent buyer works from an approved physical sample that the supplier retains, and states in the purchase contract that delivered material must match it.
Specifications
Slab and Tile Sizes
Chinese granite factories cut to standard and custom sizes. The sizes below are the ones most commonly offered; confirm actual availability with your supplier because stock varies by factory and by month.
Large slabs (gang saw)
Large slabs are the primary form for countertop and cladding work. Typical dimensions run in the 2400–3000 mm range on the long edge, with height commonly between 1200 and 1800 mm depending on the block. Thicknesses are commonly 18 mm, 20 mm and 30 mm. A large slab is sold as-is and the fabricator cuts the final piece from it, so slab size determines how much yield the fabricator gets per slab.
Cut-to-size and tiles
Tiles are cut to fixed dimensions. Standard floor and wall formats include 300×300, 400×400, 600×300, 600×600 and 800×800 mm, with 600×600 being the most commonly specified for commercial flooring. Stair treads, window sills, kerbstones and coping are cut to project dimensions.
Custom sizes
Cut-to-size work is normal rather than exceptional. Most factories will cut to a drawing, but tooling set-up adds cost and, more importantly, adds lead time. If you can work within a standard format, you will generally get better pricing and faster delivery.
Thickness and Tolerance
Common thicknesses are 18 mm, 20 mm and 30 mm for slabs, and 20 mm to 50 mm for paving and kerbstone. Thicker sections — 50 mm and above — are used where the stone has a structural role or where edge profile depth matters visually, such as pool coping and monument bases.
Tolerance is where specifications diverge between suppliers. A tolerance of ±1 mm is commonly quoted on calibrated slab. Uncalibrated material can vary considerably more. If your installation requires a consistent bed depth — and mechanically fixed cladding does — specify calibrated material with a stated tolerance and hold the supplier to it in writing.
A practical note on measurement. Thickness is typically checked at the edges of the slab. A slab can meet nominal thickness at the edge and still be thicker in the middle if the saw was not set correctly. If thickness is critical, ask how the supplier measures it and where.
Surface Finishes
The finish changes both the appearance and the performance of the stone, and it is not reversible. Once a face is flamed, it cannot be polished back.
Polished gives the darkest, most colour-saturated appearance and the highest reflectivity. It is the standard finish for interior cladding, countertops and monument work. Polished surfaces are slippery when wet, which is why polished granite is generally not specified for exterior paving.
Honed produces a matte, low-sheen surface by stopping the polishing process short. It gives a more muted colour than polished and a lower slip risk. Commonly used for interior flooring and for a more contemporary, less reflective look.
Flamed is produced by subjecting the surface to a high-temperature flame, which causes the surface crystals to spall and leaves a rough, non-reflective texture. It is the standard finish for exterior paving and is the finish most often specified for G633 in paving applications. Flamed surfaces are notably lighter in appearance than polished.
Bush-hammered is mechanically textured with a hammer head. The finish is coarser than flamed and is used where maximum slip resistance is required.
Brushed and leathered finishes sit between honed and flamed. The surface is wire-brushed to produce a subtle texture that reads as tactile rather than rough. These finishes have grown in popularity for interior flooring.
Split face and natural face are the rough, quarry-split surfaces used for wall cladding and stack stone applications, where texture is the point.
Physical Properties: What to Ask For, Not What to Assume
Granite is a family of rocks, not a single material, so a single set of physical values does not apply to every grade. Published figures for granite as a rock type place its density in the region of 2.65–2.75 g/cm³ [source: en.wikipedia.org].
That figure is useful as a sanity check — it tells you a cubic metre of granite weighs roughly 2.7 tonnes, which is what you need for freight calculations. It is not a substitute for test data on the specific material you are buying.
Two common traps:
Geological values and dimension-stone values are measured differently. Compressive strength figures quoted in geology references describe intact rock under laboratory conditions, tested to geological standards. Dimension stone is tested to different standards — in the US, ASTM C615 governs granite dimension stone — and the numbers are not interchangeable. If you see a very high compressive strength figure quoted on a stone trading site without a stated test standard, treat it as unverified.
"Typical" is not "this batch." A supplier quoting a typical density or absorption figure is telling you what the material usually does, not what your container did. For any project where the physical properties matter, request the Certificate of Analysis (CoA) for the specific production batch.
What a usable G633 specification sheet contains:
| Item | What it should state |
|---|---|
| Density | Value, plus whether it is typical or batch-tested |
| Water absorption | Value and test standard |
| Compressive strength | Value and test standard |
| Flexural strength | Value and test standard |
| Finish | Polished / honed / flamed / etc., stated per item |
| Thickness and tolerance | Nominal plus permitted deviation |
| Test body | In-house QC or third-party laboratory |
If a supplier cannot say which standard the numbers were tested to, the numbers are decoration.
Available Product Forms
G633 is a general-purpose granite and is cut into a wide range of finished products. The forms below are the ones that move in export volumes.
Slabs and Tiles
A G633 slab is the primary export form for countertop and cladding work. The relevant commercial distinction is between large slab, which is sold by the slab and gives the fabricator freedom to cut, and cut-to-size, which arrives finished to the project drawing and reduces on-site waste. Cut-to-size generally costs more per square metre but produces less waste and less site labour.
Kerbstones and Paving
A G633 kerbstone is cut in flamed or bush-hammered finish, and is a standard material for kerbstones, setts and paving. Kerbstones are cut to profile — typically with a chamfered or bullnose edge — and to dimensions set by the receiving country's road or municipal standard, which vary considerably. This is one product where the buyer's local specification, not the supplier's stock list, dictates the dimensions.
Paving is supplied in fixed formats or as random-length pieces. For projects with a visible joint pattern, fixed formats are easier to lay consistently.
Monument and Tombstone Blanks
Grey granite is the dominant material for cemetery work in most markets, and G633 is used both for full monuments and for the base and surround components of monuments whose main die is a different material. Monument work is dealt with in more detail below, because the buying process differs from architectural work.
Grades and Quality Standards
Commercial Grade vs Export Grade
Chinese granite factories commonly sort production into quality tiers for their own internal purposes. There is no universal definition of these tiers across the industry — one factory's "A grade" is another factory's standard export. What matters is that the specification in your purchase contract describes the material in observable terms rather than by grade name.
A workable specification states:
- Permitted colour variation from the approved sample
- Maximum acceptable surface defect size and count
- Thickness tolerance
- Tolerance on cut dimensions and squareness
- Edge finish quality
If your contract says "A grade" and nothing else, you have no basis for a claim.
Common Defects and How They Arise
Colour variation between slabs. The most common issue, and the one most likely to matter on a visible elevation. It arises from different quarry blocks and from different positions within a single block. Control it by requiring pre-assembly (dry-lay) photographs before packing.
Hairline cracks. Usually handling damage rather than a material defect, though natural fissures do occur. Fissures that run through the slab thickness are a reject; surface crazing is generally not.
Rust staining and colour bleed. Some granites contain iron-bearing minerals that oxidise over time, producing a brownish stain on the surface. This is a material characteristic, not a manufacturing fault, and it is worth asking specifically about for any granite going into an exterior application in a wet climate.
Edge chipping. Arises in cutting and handling. Specifying how edges are protected in packing is a more effective control than complaining after arrival.
Thickness variation within a slab. Discussed under Specifications.
Controlling Colour Variation
For any project where multiple slabs are visible together, the effective controls are:
- Approve a physical sample, and require the supplier to retain a matching reference piece.
- Require pre-assembly photographs of the actual slabs that will ship, laid out dry and photographed in daylight.
- Require single-block selection where the project justifies the cost. This limits colour range but reduces yield and raises price.
- State the acceptance criterion in the contract, in terms the supplier can check before packing.
Pre-assembly is the single most effective control and the least commonly requested. It costs the supplier time, not material, and it moves the colour conversation to before the container leaves.
Applications
Exterior Cladding and Facades
G633's fine grain and low variation suit large flat elevations where a coarse or heavily veined stone would look busy. Flamed or honed finishes are typical for exterior work; polished is used for entrance areas and interior lobbies.
Note the weight implications for mechanically fixed cladding. At roughly 2.7 tonnes per cubic metre, a 30 mm thick granite panel weighs in the region of 80 kg per square metre. Fixing systems and substrate must be designed for that load.
Paving and Hardscaping
Flamed G633 is used for external paving where a light-to-mid grey is wanted. Slip resistance is the governing performance requirement, and it is a function of finish rather than of the stone itself — a flamed surface is dramatically less slippery than a polished one in wet conditions.
Where the paving will be trafficked, thickness matters: 30 mm is common for pedestrian areas, and thicker sections are specified where vehicle loads are expected.
Kerbstones and Municipal Work
Supply to municipal specifications, which are set locally. Ask your supplier early whether they have cut kerbstones to your target market's standard before, because the profile and tolerance requirements are specific and a first-time cut is a first-time cut.
Monument and Cemetery Work
Grey granite dominates cemetery work because it is durable, takes lettering and carving cleanly, and does not weather visibly over decades. A G633 monument is a normal specification in markets where a mid-grey memorial is wanted. G633 is used for full monuments and for components.
Monument buying differs from architectural buying in three ways:
- The end client sees the material, not a specification. Colour and finish consistency matter to them directly.
- Lettering and carving quality is the product. The quality of the sandblasting, the depth of the cut and the definition of the letterform are what the customer is paying for, and they cannot be assessed from a specification sheet.
- Quantities are small and varied. A monument order is often many different designs in small numbers, which is a different production model from cut-to-size architectural work.
If you are buying monument work, ask to see photographs of completed lettering in the actual stone, not renders.
Ordering & MOQ
Minimum Order Quantities
MOQ is set by the factory, not by the material, and varies with the product form. A cut-to-size order carries a different minimum from a full-container slab order, and mixing forms in one container usually changes the calculation.
Ask your supplier directly, and ask in a way that gets a usable answer:
> "What is the minimum order quantity for G633 in large slab, in cut-to-size tile, and in paving — and can different forms be mixed in one container?"
If MOQ is a hard constraint for you, it is worth checking whether the constraint is genuinely the factory's or simply the trading company's own margin requirement. Factories that specialise in small-format work can often accommodate smaller runs than their headline MOQ suggests.
Sample Policy
Most exporters will supply a small sample free of charge and charge only for courier. What matters is what the sample represents. A sample cut from a single slab tells you the colour of that slab, not the colour range of the production run.
For a material where colour variation is the dominant risk — which includes all greys — request a sample set that spans the range, not a single piece.
Container Loading Guide
Container loading is where inexperienced buyers lose money, and it is also where the arithmetic is least standardised.
What Determines How Much Fits
Weight limit, not volume, is usually the binding constraint for granite. A 20-foot general purpose container has a payload limit typically in the region of 25–28 tonnes depending on the container and the carrier. At roughly 2.7 tonnes per cubic metre of granite, a fully packed container would exceed the weight limit long before it ran out of space.
That is the core reason why granite shipping is calculated in tonnes or square metres rather than cubic metres.
Why We Do Not Quote A Fixed Figure
You will find pages that state "a 20GP holds X square metres of granite slab." Those figures are usually derived from one particular thickness and one particular packing method, and they are wrong the moment either changes.
The variables:
- Thickness. A container holds roughly half as much 30 mm material as 15 mm, by area.
- Packing method. Slabs are shipped in wooden bundles or A-frames with timber bracing between them. The thickness of that bracing consumes volume.
- Format. Large slabs waste more container volume than tiles, which nest more efficiently.
- Destination road limits. Some markets impose road weight limits that constrain the container load independently of the container's own capacity.
- Carrier limits. Actual permitted payload varies between shipping lines and routes.
What to Ask Instead
Ask your supplier for a packing plan for your specific order — the actual number of bundles, their dimensions, the total weight, and the container type. A supplier who can produce this quickly is a supplier who has done it before.
Then check the figure against the carrier's stated payload limit for your route. If the supplier's total weight is close to the limit, ask what margin they have allowed and what happens if the port weighs heavy.
Quality Inspection & Documentation
Pre-Shipment Inspection
For container-volume orders, inspection before loading is the highest-value quality control step available, and it costs a fraction of what a rejected container costs.
A useful inspection covers:
- Count and dimensions against the packing list
- Thickness measured at multiple points
- Colour against the retained reference sample, in daylight
- Surface defects — chips, cracks, staining, polishing marks
- Edge quality, particularly on cut-to-size and kerbstone
- Packing integrity — bundle construction, bracing, edge protection
A third-party inspection company can carry this out at the factory before loading. It is normal for the buyer to commission and pay for this directly, so that the inspector reports to the buyer rather than to the supplier.
Documentation
A typical granite shipment moves with:
Certificate of Analysis (CoA) — the test report for the batch. This is the document that carries the physical properties, and it is the one most often missing or generic. Read it critically:
- Which standard was the material tested to? If no standard is stated, the values are not comparable to anything.
- Is it a typical value or a batch result? A "typical" figure describes the material family, not your container.
- Is it third-party or in-house? Both can be legitimate, but they carry different weight, and your own customer may require one or the other.
Packing list — item, dimensions, quantity, bundle number, net and gross weight. This should reconcile against the physical load.
Commercial invoice — value, terms, HS code.
Certificate of Origin — required in many markets for duty purposes. Check whether your destination requires a specific form (a generalised preference certificate rather than a plain origin declaration, for example).
Bill of Lading — issued by the carrier.
Fumigation or heat treatment certificate — timber packing material is subject to phytosanitary rules in most markets, and an untreated pallet can hold up a container at port. Confirm who is responsible for this.
Lead Time & Shipping
Lead time has three components, and suppliers often quote only the first.
Production time — cutting, finishing and packing. This varies with order size and how much custom cutting is involved, and it is longer in the run-up to Chinese New Year, when factories close for an extended period.
Inland transit and loading — moving the packed material to the port and loading. Usually short, but it is a separate step and it shows up in the schedule when port congestion occurs.
Ocean transit — varies by route and by whether the service is direct or transhipment.
Ask for all three separately, and ask for them in writing rather than as a single "delivery time" figure. A supplier who quotes "30 days" without breaking it down is not giving you a number you can plan against.
Incoterms
The term you agree determines where your risk starts. The practical distinction for a granite buyer:
- FOB (Free On Board) — the supplier delivers to the port and loads; your risk and cost begin there. This is the most common term for buyers who have their own freight forwarder.
- CIF (Cost, Insurance and Freight) — the supplier arranges and pays freight and insurance to your destination port. Convenient, but check that the insurance cover is adequate and that the freight rate is competitive.
- DDP (Delivered Duty Paid) — the supplier delivers to your door with duties paid. Simplest for the buyer, and usually the most expensive, and it requires the supplier to be competent at destination clearance.
There is no universally correct choice. The right term depends on whether you have forwarding capability, where your cash flow sits, and how much you want the supplier involved in the destination end.
FAQ
Is G633 the same as Mist Grey?
Mist Grey is the trade name most commonly used for G633 in export markets. The G-code is the underlying designation. Because trade names are not regulated, different suppliers may list the same material under different trade names, or occasionally different materials under the same one. Confirm against a physical sample rather than a name.
Can G633 be used for countertops?
Yes. Polished or honed G633 is used for countertops, and granite in general is a common countertop material because of its hardness and resistance to scratching. Two practical points: granite is porous and benefits from sealing, and polished granite is slippery when wet.
Does G633 fade outdoors?
Granite itself is stable in UV, and G633 does not have the fading problem that affects some dyed or resin-treated products. Some granites develop surface rust staining over time if they contain iron-bearing minerals; ask your supplier specifically whether G633 is susceptible and whether a sealer is recommended for your climate.
How do I check quality before the container ships?
Commission a third-party inspection at the factory before loading. Specify what you want checked — dimensions, thickness, colour against the retained sample, surface defects, packing — and have the inspector report to you rather than to the supplier.
What is the minimum order?
It depends on the product form, the factory and the current production schedule. Ask directly, and ask for the MOQ in each form separately.
Can I get a sample?
Yes, from most exporters. Request a sample set spanning the colour range rather than a single piece, particularly if you are matching an existing installation.
How much fits in a container?
Ask for a packing plan for your specific order rather than a rule-of-thumb figure. Weight limits usually bind before volume does for granite, and the amount that fits depends on thickness, format and packing method.
Related Chinese Granite Grades
If you are specifying across a project, these are the neighbouring grades worth comparing:
- G603 (Padang Cristallo) — light grey, the lightest of the family.
- G654 (Padang Dark) — dark grey, the standard choice for paving and monument work.
- G682 (Sunset Gold) — a warm yellow-brown granite, frequently used for paving and walling where a non-grey palette is wanted.
- G684 (Fuding Black) — a black basalt, not a granite, often specified alongside these grades for contrasting banding.
- G562 (Maple Red) — the red member of the same Fujian family, and the usual accent against a grey field.
- Granite Cobblestone & Sett — G633 in small-format paving: the same granite, sold by the tonne for carriageways and setts.
When specifying multiple grades on one project, order samples of all of them together and view them side by side. Greys in particular are difficult to compare across separate photographs.
Summary
G633 is a mid-grey Fujian granite sold internationally as Mist Grey. It is a general-purpose material available in slab, tile, paving, kerbstone and monument form, and its fine grain and low variation make it a sensible choice for large surfaces where uniformity matters.
The things that decide whether an order goes well are not the colour — it is a grey granite, and it will look like the sample if the controls are in place. They are the controls themselves: a retained reference sample, pre-assembly photographs before packing, a specification that states observable acceptance criteria rather than grade names, third-party inspection before loading, and a CoA that states which standard the material was tested to.
Get those five things right and G633 is an unremarkable, reliable material to buy. Get them wrong and the colour conversation happens after the container has arrived, when there is nothing left to do about it.