Every large-format slab in the StoneWhite portal has cleared the same six-stage inspection — from quarry face to studio capture. This is the protocol that makes "the slab you reserve is the slab you receive" a promise we can keep.
Inspection starts before a slab exists. Our specialists hand-pick blocks at the quarry face, reading geology, vein direction and grain — not just colour. Each candidate block is chalked, photographed and assigned a master block number that follows it through every step.
Cut slabs run through a multi-head polishing line where graded abrasive heads bring the surface from raw saw-cut to a true mirror finish. Water cools the heads and rinses the slab continuously; the operator monitors pressure, gloss and edge consistency along the entire length.
Each slab is stood upright and lit from the side. Raking light reveals what daylight hides — micro-fractures, resin lines, polish defects, surface haze. A specialist walks every slab face-by-face with a flashlight before the slab leaves the inspection bay.
Length, width and thickness are measured in three points across every slab with a digital caliper. Tolerances are recorded against the original block spec sheet. Slabs out of tolerance are pulled before they enter the customer-facing inventory.
Sister slabs are stood side-by-side on A-frames and rotated to confirm true bookmatch — vein flowing across the seam without breaks or jumps. Layouts are photographed in full so architects can preview the actual installed pattern, not a render.
Every approved slab is shot in our light booth: full-slab capture against a neutral backdrop, even lighting, controlled white balance, plus close-ups of veining and edge detail. These are the exact images that power the live portal — no stock, no renders.
Every photo on the portal comes from the inspection bay you just walked through. No stock images. No "similar piece available." The slab #07 from block #2419 is the slab #07 from block #2419 that lands on your jobsite.
