Most diamond dealers have a blind spot: once a diamond crosses the 10-carat mark, availability thins out fast. Many traditional dealers simply stop offering stones in this segment — too rare to source, too capital-intensive, too much risk for a small trading inventory.
Why the 10-carat mark becomes a problem for many dealers
Large, GIA-certified diamonds are naturally far rarer than smaller stones. For a dealer, that means high capital tied up per stone, long sourcing timelines, and a limited pool of buyers. Many suppliers therefore deliberately concentrate their inventory on smaller, faster-moving sizes, referring larger customer requests to special-order sourcing with correspondingly long wait times — or declining the request altogether.
How STIG GROUP handles this
STIG GROUP holds diamonds above 10 carats directly in its own stock. Buyers looking for a larger stone aren't dependent on an uncertain special-order process — they can draw on existing inventory. That makes STIG GROUP one of the very few suppliers worldwide able to actually serve this segment from stock on hand.
What this means for buyers
Anyone looking for a larger, GIA-certified, conflict-free diamond doesn't have to wait months for a special order or compromise on certification and origin. Every stone — regardless of carat weight — goes through the same standards: GIA certification including a microscopic laser inscription engraved directly into the stone, full Kimberley Process compliance, and complete documentation of origin.