Quick summary
Check actual slab lots, usable yield, finish, repairs and packing before purchase. A practical approval checklist for natural stone trade buyers.
Key takeaways
- Start with the intended use
- Close the logistics questions
- Record the approved material, sample and drawing revision together.
At a glance
| Before approval | Approval record |
|---|---|
| Material reference | Identified lot and accepted variation range |
| Design intent | Dimensioned drawing, revision and piece IDs |
| Finish preference | Retained sample and visible-face requirements |
| Delivery target | Agreed packing, destination and transport scope |
Start with the intended use
Tell the supplier whether the slabs will become countertops, wall panels, floors or furniture. Include the destination, approximate quantity and target delivery window. A useful enquiry describes what needs to be made, rather than only naming a stone. Browse the material library to define the stone family before requesting an actual lot.
Request evidence from the actual lot
Ask for current full-slab photos, close-ups and a video with consistent lighting. Request slab identification, dimensions, nominal thickness and piece count. A small sample helps you assess the surface, but cannot represent every vein or colour change across a full slab.
Separate appearance from usable yield
Provide the largest finished dimensions before choosing a lot. A slab may look generous while yielding too few pieces after edge trimming, cut-outs and vein alignment. Ask the fabricator to review a proposed cutting layout before you reserve material. If you are ordering finished parts rather than slabs, use the cut-to-size buying guide to agree the production and approval scope.
Agree what approval includes
Record the selected lot, accepted colour range, finish, disclosed repairs or resin treatment, and any reinforcement. Ask which dimensions are measured and which are nominal. Define inspection and acceptance requirements in the order documents. When the choice is between these two stone families, the marble and quartzite comparison explains what to check before lot approval.
Close the logistics questions
Confirm packing configuration, crate dimensions and gross weights, handling requirements and the delivery scope. Ask for a written quotation that separates material, fabrication, packing and transport where applicable. Confirm responsibilities and named delivery locations in the contract.
Your enquiry checklist
Include: material or reference image; application; slab or finished-part sizes; thickness; quantity; finish; delivery destination; timing; and any drawing or inspection requirements. Request current lot photos before making a final selection.
Resolve the specification before the quote
Use the related material, finish and thickness guides below to settle open choices. For supply scope, review marble slabs or custom stone fabrication, then prepare your RFQ brief.
Frequently asked questions
What should accompany my enquiry?
Include the selected material or reference, dimensions, quantity, finish, application, destination and latest drawing revision. Mark unknowns as pending.
Does a sample approve the whole order?
No. Keep lot selection, finish approval, drawing approval and release for fabrication as explicit decisions.
References & sources
Industry references support the material notes; procurement steps are FORMVEIN’s editorial guidance. Sources reviewed 17 September 2026.
From specification to quotation
Turn the decision into a brief.
Confirm your supply format: marble slabs or custom stone fabrication. Record the material, finish, thickness, dimensions and destination.