Marble Sourcing Guide for Importers: What to Lock Before You Compare Supplier Quotes

Quick Answer：Three quotes on the same marble can differ by a quarter and all three be honest. The stone name and the square metres you sent aren't enough to make them the same order.

Five things decide whether two quotes are measuring the same thing: which material, how the quantity was counted, how much of the work the price covers, whether the stone is reserved or merely in stock, and which of your approvals lets the factory start cutting. Lock those five and the prices become comparable. Leave them open and the lowest number is usually just the one with the most left out of it.

What has to be fixed before suppliers can quote the same order

A stone name and a size are a starting point, not a specification. Suppliers will read whatever you left open, and they will read it in the direction that makes their quote easier to win.

Commercial names in marble aren't controlled by anyone. The same Chinese white marble is sold as Aran White, White Magnolia and Magnolia White depending on who is writing the offer, so two quotes can name the same stone and price two different blocks. A name on its own doesn't identify material. What identifies it is a name plus something checkable: a photograph of actual slabs, a sample you can trace back to a block, or a reference the supplier can match against.

Four lines do most of the work, and the first one costs the most when it's missing:

That last line has to be written as a limit rather than as a wish. Natural veining wanders inside a block, so there is no such thing as no variation between slabs. A specification that asks for none can't be met by anyone, which makes agreement to it worth less than it looks. The usable form is a maximum: how far a vein may be out of line at a joint, how far the background tone may shift across a batch, measured against a sample or a photograph both sides hold.

What quantity are you actually asking suppliers to quote?

When you write 500 m² (5,400 sq ft) in an enquiry, you haven't yet told anyone what to price. That figure is a project quantity, and the number that gets ordered is larger than the number that gets installed.

The gap is cutting. Stone is sold by area but consumed by piece, and the offcut around a shaped piece can't be sold to anyone else. How much larger the order has to be depends on the material and on what is being made from it, which is why a single allowance figure doesn't travel well between orders. You'll see 10–15% quoted as a rule of thumb; it answers a fabricator's question about waste in their own shop, not yours about how much to buy.

What matters for a quote is which of the two conversions the supplier has applied to your number, and the answer differs by order type:

Ask each supplier which figure they've quoted: the quantity you gave, or a larger one worked back from it. Both are legitimate. But a rate per square metre priced against your figure isn't comparable with a rate priced against a worked-back one, and two quotes whose rates look close can land a long way apart on the total. Compare the totals, and ask what quantity each total is for. Ask about spares while you're there, because a replacement piece cut from the same batch a year later is a different conversation from one cut now.

What supply responsibility is actually included in the price?

A quote is a price for a scope of work, and marble scopes vary more than most buyers expect. Asking whether a price is final is the wrong question, because a supplier can quote material only, material with fabrication, ex-works, or delivered to a port, and every one of those is a legitimate answer.

The useful question is which steps of the chain sit inside the number. Run the quote against the sequence and ask what falls outside it:

• Material form: blocks, sawn slabs, or finished pieces
• Fabrication: cutting to your drawing, shaping, cut-outs
• Treatment: resin filling and mesh backing
• Edges and cut-outs: profiles, mitres, sink openings
• Numbering and layout: piece numbers and a layout drawing, or neither
• Packing: crates, bundles, and the materials inside them
• Trade basis: FOB, CIF, or something before either
• Stated exclusions: what the supplier has written down as not included

Treatment and layout are easy to miss, because both are invisible in a photograph of a finished slab and both cost real money. Resin and mesh are normal parts of turning a block into slabs rather than a repair to a bad one, so their absence from a quote is more likely to mean they were priced elsewhere than that they were skipped.

Crating is worth its own question. Some suppliers price the marble alone and list crating, packing and similar items separately, which makes the headline rate per square metre look lower while the total can end up higher once those lines are added back. That's a pattern we've seen in quotations rather than a rule about the trade, and it's easy to neutralise: ask every supplier to quote on the same trade basis, with packing shown either inside the rate or as a named line.

When does "available" material actually become your allocated stock?

Available means the supplier has it today. It doesn't mean they're holding it for you.

Three questions settle it, and they're worth asking before the price is agreed rather than after:

• What action actually reserves these slabs against my order?
• How long will they be held?
• What releases the reservation?

The answers vary by supplier, so take them individually rather than assuming an industry norm. On our orders, material is reserved against a deposit: for a project it's held around the project schedule, and for wholesale or smaller quantities the holding period is typically one to two months. Without a deposit, stock stays available to whoever buys it first. We lose orders that way, to buyers who needed another week to decide.

Marble makes this sharper than most categories. If the bundle you were looking at sells, the replacement isn't the same bundle. It may be the same variety from the same quarry and still read differently on a wall, because the veining changed further down the block. Waiting a fortnight to confirm costs nothing when you're buying a manufactured product. Here it can cost you the material you selected.

Which buyer approval lets the supplier move to the next step?

Approving something in a marble order isn't a formality, and the question worth asking isn't what you've committed to but what the factory is now allowed to do. Each approval unlocks a different step.

The last row is the one to slow down on, because cutting can't be undone. Photographs of actual slabs, a specific slab number, a whole bundle, a digital layout drawing: each tells the factory something different about what you've accepted, and a buyer who says "looks good" to a photograph hasn't told them which slabs, or in what order.

Two points in that sequence are worth pinning down with any supplier. The first is price: once selected slabs are locked into an order, we hold the material price for that order, which turns slab selection into a commercial step rather than a browsing one. The second is the layout. Every slab that has to be cut is laid out digitally first, and that drawing goes to the buyer before anything is cut, because the drawing decides where each piece falls in the veining. It's the last approval that can still change the outcome, and it's worth reading properly rather than returning the same day.

What can a marble supplier reasonably guarantee before production?

Some things can't be fixed in a specification.

Nobody knows what the second block will look like until it's opened. Colour and veining shift as a block is worked through, and a quarry that supplies a variety consistently still supplies batches that are close rather than identical. These are properties of the material, not gaps in anyone's quality control, and contract language doesn't change them.

What works instead is to convert each of them into something that can actually be agreed:

This also gives you a way to read the three quotes in front of you. If one supplier has agreed to something the other two declined, that isn't automatically the better offer, and it's worth asking how they intend to hold to it. An argument avoided at the quotation stage tends to come back at the container, where it costs more to settle.

Before you send the enquiry

If you're about to send the same request to three suppliers, the useful step isn't asking for a better price. It's closing those five gaps before it goes out — the material, the quantity, the scope, the reservation, and the approval that releases cutting. Three numbers built on the same five answers are measuring the same order.