Granite slab inspection is one of the most important steps before a buyer approves shipment. A beautiful photo is not enough. International buyers need to confirm color range, thickness, finish, cracks, resin, packing, labeling, and batch consistency before the slabs leave the factory.

This CSS STONE checklist is written for importers, builders, fabricators, hotel project buyers, and distributors who need a practical way to review granite slabs before paying the balance or booking a container.

Confirm the Material Name and Batch

Start with the basic identity of the stone. Granite names can vary between suppliers and markets, so buyers should confirm the commercial name, finish, thickness, quantity, and bundle numbers. If the order includes several bundles, ask the supplier to mark each bundle clearly and provide bundle-by-bundle photos.

Check Color Range and Pattern Consistency

Granite is a natural material, so variation is normal. The inspection goal is to confirm whether the range is acceptable for the project. Buyers should review wide-angle bundle photos, close-up surface photos, edge photos, and photos taken under consistent light.

Inspect Cracks, Fissures, and Repairs

Some natural lines are part of the stone, but open cracks, unstable fissures, broken corners, heavy filling, and poor resin treatment can create fabrication risk. Ask for photos under strong light and angled light. Mark unacceptable areas before approval.

Verify Thickness and Size Tolerance

Granite slabs are often ordered in 18 mm, 20 mm, or 30 mm thickness. Buyers should measure several points across the slab or request caliper photos. For tiles and cut-to-size pieces, confirm length, width, diagonal tolerance, edge straightness, and quantity by size.

Review Surface Finish Quality

Polished granite should have a consistent reflection without dull patches, waves, severe scratches, or visible abrasive marks. Honed, flamed, leathered, and bush-hammered finishes need a different check: the texture should be even and suitable for the final application.

Check Packing Before Container Loading

Good packing reduces breakage risk. Slabs should be packed in strong wooden bundles or frames suitable for export. The inspection should confirm bundle strength, bottom support, plastic protection, moisture control, labels, shipping marks, and whether the slabs are fixed tightly enough for container movement.

Granite Slab Inspection Checklist

  • Material name, color, finish, and quantity confirmed
  • Batch photos reviewed before approval
  • Color range accepted for the project
  • No unacceptable cracks, broken corners, or unstable repairs
  • Thickness and size tolerance checked
  • Surface finish matches project requirements
  • Export packing and labels inspected
  • Container loading photos requested

FAQ

Can buyers inspect granite slabs only by photos?

Photo inspection is useful for early approval, but important orders should use a clear photo protocol or third-party inspection when the project has strict color, thickness, or fabrication requirements.

What is the biggest inspection risk for granite slabs?

The most common risks are color mismatch between bundles, unstable cracks, inconsistent finish, incorrect thickness, and weak packing before shipment.

Should buyers inspect before or after packing?

Both stages matter. Slab quality should be checked before packing, and packing quality should be checked before container loading.

CSS STONE buyer note: If you are comparing granite suppliers, prepare one inspection checklist before quotation. It helps every supplier quote and prepare samples under the same standard.