Every stone listed on Nveloop carries its full disclosure record: variety, weight, origin, treatment and the laboratory report backing it. Reports from GRS, GIA, SSEF, Gübelin, AIGS and GIT are verified against the issuing lab before a listing goes live.

Heat is the most common and widely accepted enhancement in sapphire and ruby. Emeralds are routinely oiled, graded from insignificant to moderate. Unheated stones with a reputable report command a substantial premium — filter by Unheated / No Treatment to see them alone.

Trade pricing is quoted per carat, then multiplied by weight. A 5 ct stone at $9,800/ct is $50,176. Larger stones of equal quality carry a higher per-carat rate, so always compare $/ct rather than the total when benchmarking two stones.

Stones ship fully insured door to door with tracked courier and are covered for the invoiced value in transit. Certified stones carry a 7-day inspection window; memo terms are available to verified trade buyers.

Certified Loose Gemstones for Trade

Sapphires, rubies, emeralds and rare stones from verified traders, lapidaries and mine-direct suppliers worldwide.

Lab-verified reports Full treatment disclosure Per-carat trade pricing Updated daily

Certified Loose Gemstones for Trade

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