Wholesale Granite Slab Natural Stone

Three Different Things Get Called "Wholesale" Granite

Before comparing prices, it helps to know which tier you are being quoted, because the word wholesale covers three quite different offers and they carry different risks.

• Container lot direct from the factory. This is the real wholesale tier. You buy by the container or a part-container, priced FOB a named Chinese port, with the slabs or tiles cut to your sizes. Price is the lowest and the specification is whatever you wrote down; you carry the quality risk and the working capital.
• Bundle or stock lot. Buying a specific bundle, or the factory's remaining stock, at a discount. Genuine bargains exist, but you are accepting someone else's grade and thickness mix, and the lot will not repeat when you reorder.
• Landed stock from a distributor. No minimum, fast delivery, and you pay the landed cost plus a margin. This is the right tier when you need 60 m² next week. It is the wrong tier if you are building an import programme, because you are paying someone else's freight and duty.

Which explains the rule worth keeping: a wholesale price far below the market is not a favour. It usually means B-grade with shade variation across the lot, nominal thickness that arrives under, no shade sorting between bundles, no batch test report, or a bundle cut from the end of a block. Decide which of those you will accept and which you will not, and put that decision in the purchase order rather than in an email.

Where the stone comes from decides the port. Chinese granite is quarried mainly in three provinces, and each ships from its own port: Fujian (G603, G614, G654 — loading Xiamen), Shandong (G377 Spray White, G682 — loading Qingdao) and Guangdong (G4418 — Xiamen or Shenzhen). The quarry province fixes the loading port, and the port fixes both the inland haulage and the sailing schedule. "FOB China" without a port named is not a shipping term.

Container Maths: Why the Limit Is Weight, Not Volume

Granite is dense — about 2.6 to 2.8 tonnes per cubic metre — so a container of slabs runs out of payload long before it runs out of space. Trade indications put a 20ft container at roughly 400–450 m² of 20mm slab but only about 280–300 m² of 30mm slab, and a 20mm slab costs roughly a third less per square metre to ship.

Reality is messier than any rule of thumb. Published customs and bill-of-lading records for granite slabs shipped in 20ft containers show anything from 22 to 65 slabs in 2 to 8 bundles, with cargo weights from about 7.5 tonnes to about 23.5 tonnes. That spread is normal: slab dimensions, thickness and whether the buyer mixed colours all change the count. A part-loaded container is a legitimate shipment, not a suspicious one.

What you should do is set the quantity from the payload limit rather than from the supplier's m² figure:

• At 20mm and about 54 kg/m², a 400 m² load is roughly 21.6 tonnes.
• At 30mm and about 81 kg/m², a 300 m² load is roughly 24 tonnes.
• One published logistics source puts the practical 20ft cargo limit at roughly 27 tonnes for Europe and about 19.9 tonnes for the United States. On a US lane, both of the loads above are already at or past the limit.

Confirm the payload limit for your own route and destination with your freight forwarder, then work back to a square-metre quantity. That way the order you place is one the container can legally carry — not one the supplier can fit in the door.

How slabs are packed to survive that weight. Granite has high compressive strength but low tensile strength, so slabs are never laid flat. They travel vertically on A-frames at roughly 75–80°, leaning against a central spine so the mass sits over the centre of gravity, with anti-slip pads and strapping holding the bundle. Bundle frames normally carry the block number, bundle number and slab sequence numbers, which is what lets you trace a slab back to its block after arrival. Ask for the packing list with frame and bundle numbers so you can reconcile it against what you unload. Tiles and cut-to-size pieces travel differently: in reinforced wooden crates with internal padding and edge protection, not on A-frames.

Pre-Shipment Inspection: the Six Checks That Matter

1. Shade and pattern across the whole lot, with the bundles photographed before the container is closed. Shade is a lot-level property: approving one bundle tells you nothing about the rest.
2. Thickness, measured with a caliper at several points per slab. Loose tolerance is the most common hidden downgrade on a wholesale lot, and it appears as lippage on site.
3. Ring test each slab with a rubber mallet. A clear, metallic ring means sound stone; a dull thud points to an internal crack that will open when the slab is lifted.
4. Wet the unpolished back of a slab. Hairline fissures and unseen cracks read as dark lines once the surface is wet.
5. Resin treatment and mesh backing. Both are legitimate — resin fills natural pits and reinforces microfissures, mesh backing stabilises the slab in transit and during fabrication — but they change how the stone behaves. A resin-treated slab takes up less sealer than an untreated one of the same type, resin can yellow under prolonged UV on light stones, and it softens with strong solvents such as acetone. Ask for the disclosure in writing.
6. Dye check on dark material. Wipe a clean white rag with acetone, then with MEK, across the surface. Any colour transfer means the granite has been dyed, and dyed dark granite fades back toward its true colour with nothing more than water and a mild cleaner. The fade shows as blotches across an installed floor or facade, not as a gradual even change.

A third-party inspection from SGS, Bureau Veritas or an equivalent issuing a Quality Inspection Certificate is normal practice when payment is by letter of credit, and it is worth the fee on a first order from any new supplier even when nothing requires it.

Landed Cost: What You Actually Pay Beyond FOB

FOB covers the stone and delivery to the named Chinese port. On top of it sit ocean freight, marine cargo insurance, destination terminal handling and inland delivery, customs duty and — for the United States — the Section 301 tariff on Chinese-origin goods. This is where a "cheap" FOB quote stops being cheap, and it is the part of the calculation most first-time importers underestimate.

Current published guidance for the US market: granite classified under HTS heading 6802 carries a 3.7% general (MFN) rate plus a 25% Section 301 tariff, an effective rate often quoted at about 28.7%, and some 2026 sources describe an additional 10–12.5% tier that can push all-in exposure past 35%. Section 301 is origin-based rather than route-based, so goods that are a product of China can attract it even when shipped from a third country, and misclassification is a real risk — engineered stone is sometimes entered under a different heading, and customs authorities can and do reclassify, with back-duty, penalties and demurrage following. Confirm the exact 10-digit line, the origin and any Chapter 99 reporting with your own customs broker before you commit to a price. This is the line item that changes most often and by the most.

Classification is not a detail. 6802.23 covers granite that is merely cut or sawn with a flat, even surface; 6802.93 covers granite further worked — polished slabs, for example. Crude blocks of uniform size fall in Chapter 25 (2516.12). Rates differ between those lines and between destination countries, so the duty you pay depends on how far the stone has been worked and where it enters, not on what the trade name says.

How to compare two wholesale quotes honestly. Compare landed cost per square metre against an identical specification: same thickness, same finish, same thickness tolerance, same packing, same spare allowance, same named port, same Incoterm. Any comparison that skips one of those is not a comparison, it is a price. And fix the commercial terms in writing before production: the named loading port; whether the price is FOB, CFR or CIF; which origin charges are excluded; the payment terms; the delivery window from deposit; and your right to inspect and reject before the balance payment is released.

Where to read next

• Granite slab and tile supply and G602 granite tiles
• Granite paving, slabs and tiles from the manufacturer
• Granite slabs wholesale guide — grades, sizes and buying direct
• Stone import guide — documentation, Incoterms and customs
• Import duties and tariffs 2026 — rates by destination market
• Container loading guide and supplier verification checklist