Buying stone slabs as a fabricator: suppliers, landed cost, negotiating and purchase orders

Most U.S. countertop fabricators buy slabs from stone distributors and regional yards, and buy branded engineered quartz through each brand's authorized distribution. Larger shops add direct purchases from importers or whole containers from overseas, which can cut material cost but ties up cash and moves freight, customs and quality risk onto the shop. Whatever the source, compare suppliers on landed cost, meaning price plus freight, duties and handling, not the price on the sheet. The best terms come from being a predictable, well-organized customer who pays on time, and every purchase should run through a purchase order tied to the job it is for.

How stone gets to your shop

Natural stone passes through several hands between the quarry and your saw:

1. Quarry. Cuts large blocks from the ground.

2. Processor or exporter. Saws blocks into slabs, polishes them and bundles them, usually near the quarry in Brazil, India, Italy, Spain, Turkey and other countries.

3. Importer. Buys by the container, clears U.S. customs and holds large stock. Many importers are also distributors.

4. Distributor or regional yard. Keeps slabs on display in U.S. warehouses, lets fabricators and their customers pick specific slabs, and sells in single slabs.

5. Fabricator. Cuts, finishes and installs.

Each step adds cost for freight, storage, breakage, financing and margin. Engineered quartz takes a shorter path: the manufacturer sells through its own distribution centers or appointed distributors, and the big brands usually require fabricators to qualify as authorized dealers or fabricators.

A bundle is a group of slabs, often around 4 to 8, sawn one after another from the same block and sold together. A lot is a set of slabs from one block or production run. Slabs from the same bundle or lot match in color and pattern. Slabs of the same color name from different lots often don't, which is why multi-slab jobs should come from one lot.

Opening a trade account

Distributors are mostly trade-only. To open an account you typically need a registered business, a physical address, proof of insurance, sometimes trade references, and a credit application if you want payment terms.

Sales tax needs care. A resale certificate (issued by your state, not the IRS) lets a business buy goods it will resell without paying sales tax at purchase. Whether a countertop shop can use one depends on how your state treats countertop installation. In some states the shop resells the stone and collects tax from the customer. In others, installing countertops is treated as a contractor improving real property, and the shop pays tax on the materials it buys. Ask your state revenue department or your accountant before you set up accounts.

Where to buy: the main supplier types

Most shops use two or three distributors for natural stone plus one or two quartz programs. One supplier for everything is simple but leaves you with no alternative when they run out or raise prices. Ten suppliers spreads your volume so thin that nobody treats you as an important customer.

Price terms: FOB and landed cost

FOB stands for free on board. It says where ownership and the risk of damage pass from seller to buyer, and who pays freight after that point. The term is used two ways:

• Domestic U.S. freight. FOB origin (or FOB shipping point) means you own the slabs, and pay for and insure the freight, from the moment they are loaded at the supplier's warehouse. FOB destination means the seller owns the slabs until they reach your door, and the freight is usually built into a higher price.

• International shipping. FOB is an Incoterm, one of the standard international trade terms. The seller loads the goods onto the ship at a named port, and the buyer takes over from there: ocean freight, insurance, U.S. customs and inland trucking. CIF (cost, insurance and freight) means the seller also pays ocean freight and insurance to the U.S. port. EXW (ex works) puts even more on the buyer, including loading at the seller's warehouse.

Under FOB origin, if a slab cracks in transit, your claim is against the trucking company, not the supplier. For interstate shipments, federal law generally gives you at least nine months to file a freight claim, but the claim is only as good as your paperwork. Write damage on the delivery receipt before signing and photograph it with the truck in frame. Receiving checks are covered in slab inventory management.

Landed cost is what a slab really costs by the time it stands in your rack:

Landed cost = purchase price + freight + insurance + duties and tariffs + fees + unloading

A worked example. You buy a bundle of seven 3cm granite slabs at $900 each ($6,300), about 55 sq ft per slab, FOB origin from a distributor 250 miles away.

Freight and handling added about 13%. A "cheaper" slab from a supplier 400 miles away can easily cost more than a local one. Watch for extra charges on the freight bill: liftgate, residential or limited-access delivery, and waiting time if your crew isn't ready to unload.

Price your jobs and value your inventory at landed cost. A shop that uses the price-sheet number underprices every job by the freight. See pricing methods.

Negotiating better prices

Slabs are not a pure commodity. Two yards rarely have the same slabs, and the right slab for a customer is often worth more than a small discount. Still, there is room to improve your terms.

What actually moves a supplier:

• Predictable volume. A shop that buys a steady amount every month is worth more to a distributor than one that buys in bursts. Offering to route most of your purchases in a material to one supplier for six months can earn a better price tier or a price lock.

• Consolidated orders. One order for five slabs across several jobs costs the supplier less to pick, load and invoice than five separate trips.

• Paying early. Many suppliers offer terms like 2/10 net 30: 2% off if you pay within 10 days, otherwise the full amount in 30 days. Taking a 2% discount for paying 20 days early is worth roughly 37% a year in interest terms, far more than most shops earn on cash in the bank. If you have the cash, take the discount.

• Aged lots and remnants. Slabs that have sat for months cost the distributor storage and tie up its money. These usually carry the deepest discounts, and they are often fine stone in colors that went out of fashion.

• Timing. Demand is usually softer in late fall and winter than in the spring rush, and new container arrivals give distributors a reason to move older stock.

• Competing quotes. Get a second price on the same material before a large purchase. Be honest about it, and don't use fake quotes. The stone world is small.

When not to push hard: when a job is on a tight deadline and you could lose the slab, when you need a specific lot for a matched job, or when the supplier's service (holds, quick pickups, damage credits) is worth more than a few percent.

Keep your own purchase history by supplier, material and price. When you ask for a better tier, a record showing $180,000 of purchases last year is far more persuasive than "we buy a lot from you."

Volume discounts, rebates and carrying cost

Distributors reward volume in two ways:

• A volume discount lowers the invoice price once you reach a spending tier. You see the savings immediately.

• A rebate charges full price and pays back a percentage later, quarterly or yearly, once you prove you hit the threshold. It creates a cash-flow gap, and rebate claims often have deadlines. Shops that don't track their invoices lose rebates they earned.

Check how tiers reset. A tier based on each month's spend punishes shops with seasonal swings. A tier based on a quarterly or yearly average is kinder to them.

Buying more to reach a tier only pays if the stone turns into jobs quickly. Holding inventory costs money: storage space, insurance, breakage, and the cash tied up in it. A common rule of thumb puts the yearly cost of carrying inventory at 20 to 30% of its value. At 25% a year, a slab held for six months has cost you about 12% of its price before it's cut. A 10% discount on stone that sits that long loses money. Buy ahead only in colors you sell every month.

Buying groups

A buying group pools the purchases of many independent shops to negotiate prices closer to what a large chain gets. Some are member-owned co-ops that pay year-end rebates, some are for-profit groups funded by dues or supplier fees, and some are purchasing programs run by trade associations. The Natural Stone Institute and ISFA, for example, offer member discount programs with some suppliers, but they are associations first, not buying groups.

Things to know before joining:

• Savings vary widely and no trade body publishes audited numbers. Groups tend to do best on tooling and consumables, which are true commodities. Slab pricing, and especially branded quartz, moves much less.

• Many groups require a minimum revenue or years in business, annual dues, insurance certificates and a commitment to route a share of purchases through contracted suppliers.

• Do the math on your own spend. If you buy $300,000 a year of material and tooling and a group saves you 5% on the half that its suppliers cover, that is $7,500 a year against the dues and the time spent on rebate paperwork.

• The common failure is paying dues and then buying the same way as before.

Groups make the most sense for small and mid-size shops with a steady material mix. Very large shops can often negotiate as well on their own.

Buying direct from importers and by the container

Buying direct from an importer, or importing a container yourself, removes one or more margins from the chain. Savings of 20 to 40% on the material are often quoted, but those figures come from market conversations, not published invoices, and they are before your own costs of doing the importer's job.

What a container holds

Stone fills a container by weight long before it fills it by volume. A 20-foot container, the usual size for stone, typically carries about 18 to 20 metric tons (roughly 40,000 to 44,000 lb) of cargo on U.S. roads. With a 3cm granite slab weighing roughly 1,000 lb, that is about 35 to 45 slabs, or roughly 2,000 to 2,500 sq ft. 2cm slabs are lighter, so more fit. A 40-foot container carries little or no more stone, because the road weight limit is about the same.

A worked container example

A container of 42 commercial-grade 3cm Brazilian granite slabs, about 2,300 sq ft. The figures are an illustration only.

U.S. customs duties are generally charged on the value of the goods, not on the ocean freight. Compare the landed figure with what your distributor charges for the same colors, then subtract what the container costs you after arrival: unloading equipment and labor, rack space, the cash tied up until the last slab is used, broken slabs, and colors that don't sell.

Risks of buying direct

• You buy blind. Importers and exporters sell from photos of blocks or slabs. Pattern and color can differ from the photos, and you can't return a container.

• Lead time. Sea time is roughly 2 to 3 weeks from Brazil and 4 to 6 weeks from India, but order to yard is often 6 to 12 weeks once production, booking, customs and trucking are added. Port delays add storage and demurrage charges (daily fees for keeping a container too long).

• Cash. A container is usually paid for before or at shipping. A bank letter of credit, which pays the seller only when shipping documents prove the goods are on the ship, protects you but costs fees.

• Customs. Commercial shipments worth over $2,500 need formal customs entry and a customs bond, normally arranged through a licensed customs broker.

• Fraud. Wire fraud with fake bank details is common in import deals. Always confirm wire instructions by phone, using a number you found yourself, not one from the email.

• Sell-through. A container of one color is only cheap if you use it. A good test is whether you can realistically cut the whole container within two to three months.

Many mid-size shops get most of the benefit with less risk by buying bundles direct from a U.S. importer, or by splitting a container with one or two non-competing shops.

Tariffs and supply risk

Most U.S. countertop granite, marble and quartzite is imported, so trade policy and exchange rates flow straight into slab prices. The U.S. Geological Survey puts net import reliance at about 81% for all dimension stone and 85% for granite (2025, by value). As of October 3, 2026:

• A 25% U.S. tariff applies to Brazilian granite, marble and slate entered from July 22, 2026. Brazilian quartzite is exempt from it.

• A separate duty applies to goods from about 60 countries from July 24, 2026: 10% for some (including India) and 12.5% for the rest (including Brazil, China, Vietnam and Turkey). It stacks with the Brazil tariff, so Brazilian granite, marble and slate pay about 37.5% in added duty and Brazilian quartzite pays 12.5%. Lawsuits against this duty were argued at the U.S. Court of International Trade on September 30, 2026, and the U.S. and Brazil agreed that day to start trade talks, so either rate could change.

• Since August 15, 2026, imported engineered quartz carries a four-year safeguard tariff: an extra 25% within a quarterly quota and 50% above it. Canada, Mexico, Israel, Korea, Australia and some others are exempt. It stacks on other duties and does not cover natural stone.

• Chinese natural stone has carried a 25% tariff since 2019, and quartz surface products from China (since 2019) and from India and Turkey (since 2020) carry antidumping and countervailing duties that vary by manufacturer.

• The 2025 emergency tariffs (IEEPA) were struck down by the Supreme Court on February 20, 2026. If your shop was the importer of record on containers that paid them, you may be owed a refund with interest. It is not automatic: you or your customs broker must file a claim through CBP's ACE portal, and refunds on older entries that CBP has already closed out (finally liquidated) are limited to importers with a court case.

• Engineered stone faces regulatory risk. Australia banned it from July 1, 2024. In California, public comment on a proposed Cal/OSHA emergency ban on fabricating engineered stone above 1% crystalline silica closed September 30, 2026, and the rule still needs a Standards Board vote. Check with Cal/OSHA for the current status.

Tariff rates change often. Ask suppliers for current landed prices before you update price lists, put expiry dates on quotes, and add a price-escalation clause to long builder contracts. More in pricing and supply trends and granite grades and origins.

Purchase orders and special orders

A purchase order (PO) is your written order to a supplier. It is how you prove what you ordered, catch billing errors and know what is on the way.

A useful slab PO lists:

• PO number and the job number it is for (or "stock")

• supplier, contact and your account number

• each slab or item: material, color, thickness, finish, size, and slab, bundle or lot number when you picked specific slabs

• agreed price, freight terms (FOB origin or destination) and payment terms

• required-by date and delivery or pickup details

• any hold the supplier has placed, with its expiry date

Special orders are the weak spot in most shops. A special order is material bought for one job: a quartz color you don't stock, a customer-selected slab, a specific sink. The salesperson promises it, nobody orders it, and the job stalls a week before install. The fix is simple:

1. Every special order gets a PO the same day the deal is signed, linked to the job.

2. Every PO has a required-by date, worked back from the template or cut date.

3. Someone checks expected arrival dates every week and chases anything late.

4. Holds are confirmed in writing. A verbal hold is how you lose the second slab of a matched pair.

Receiving and billing. When slabs arrive, check them against the PO before signing, then enter them into inventory the same day (see slab inventory management). When the supplier's bill comes, compare three documents: what you ordered (PO), what you received, and what you were billed. Shops call this a three-way match. Differences in size, price or quantity get resolved with the supplier before you pay, or at least recorded, so your job costs use the real price.

Keeping score on suppliers

Once a quarter, look at each main supplier on a few points:

Common mistakes

• Comparing suppliers on sheet price instead of landed cost.

• Pricing jobs from last quarter's slab cost after a supplier increase or a tariff.

• Chasing a volume tier with stone that then sits for months.

• Special orders without a PO or a date, discovered missing the week of install.

• Signing a clean delivery receipt and finding broken slabs afterward.

• Paying bills without checking them against the PO and what arrived.

• Losing rebates because nobody filed the claim.

Where software helps

Purchasing gets expensive when special orders live in someone's head and freight never reaches the job cost. In Stonify, special orders are created from the job and become purchase requests, and a purchaser turns a request into a PO in one click with a requested date. POs can carry extra charges such as freight, which are spread into each slab's landed cost, and a PO calendar shows expected arrivals by ETA. Receiving creates inventory at PO prices with barcodes, and the supplier's barcodes can be kept. Slab photos and dimensions can come in from Slabsmith or Horus scanners. When a PO is closed, any difference between what was received and what was billed goes to a purchase price variance account, so the books and job costs use the real cost. A special order report shows every open special order and which products are ordered most.

FAQ

How much should I keep in stock versus special order? Stock the colors you sell every month, usually a core set of quartz and a few granites, and special order everything else. Review stock every quarter. Anything unsold after about 90 days is a candidate for a promotion or a remnant sale.

Can a new shop get trade pricing? Yes. Most distributors open accounts for any registered business with insurance, though payment terms and the best price tiers usually come after several months of steady buying and on-time payment.

Should I let customers pick slabs at the distributor? For natural stone, usually yes. It sells the job and prevents "that's not what I expected." Tag the chosen slabs, get a written hold with an expiry date and record the slab numbers on the job.

Who pays if a slab arrives broken? It depends on the freight terms. Under FOB origin you own the slab in transit and claim against the carrier. Under FOB destination the supplier does. Either way, note the damage on the delivery receipt before signing.

Is it worth importing a container myself? Only if you can use the whole container within a few months, have the cash and storage, and are ready to handle customs and quality risk. Most shops do better buying bundles from importers or splitting a container.

Do suppliers take back slabs we don't use? Some accept uncut slabs within a short window, often with a restocking fee. Cut material is almost never returnable, and neither are special orders in many cases. Ask before you order.

Sources

• USTR, Notice of action: Section 301 investigation of Brazil, 25% additional duty from July 22, 2026 (July 2026)

• USTR, USTR takes action in forced labor Section 301 investigations (July 23, 2026)

• Stone World, Two Section 301 actions stack tariffs on Brazilian stone (August 24, 2026)

• The White House, Proclamation on imports of quartz surface products (July 31, 2026)

• U.S. Department of Commerce (ITA), Quartz surface products from India and Turkey: continuation of antidumping and countervailing duty orders (applicable December 18, 2025)

• U.S. Customs and Border Protection, IEEPA duty refunds (updated September 30, 2026)

• U.S. Geological Survey, Mineral Commodity Summaries 2026: stone (dimension) (February 2026)

• eCFR, 19 CFR 143.21, merchandise eligible for informal entry ($2,500 limit)

• U.S. Code, 49 U.S.C. 14706, liability of carriers (Carmack Amendment)

• Cal/OSHA, Emergency silica advisory committee and draft artificial stone rule (2026)