GemstoneCertification
Establishing authenticity, quality, and value of precious and semi-precious gemstones with scientific precision.
The Complexity of Colored Stones
UGL independently certifies an extensive array of both precious and semi-precious colored gemstones. From investment-grade Burmese rubies to everyday commercial stones, our laboratory establishes undeniable authenticity.
Unlike diamonds, colored gemstones require immense empirical knowledge and highly specialized reference databases. Gemstones can be natural, synthetic, simulated, treated, or assembled — identifying exactly what a stone is, and what has been done to it, is paramount for establishing fair market value.
Comprehensive Assessment Protocols
Every UGL gemstone report covers four critical areas, each verified by certified gemologists using state-of-the-art instruments.
Species Identification
Conclusively determining if the gem is Natural Earth-mined, Laboratory Synthetic, or a manufactured imitation using refractive indexing and specific gravity.
Origin Analysis
Mapping trace element chemistry (EDXRF/LA-ICP-MS) alongside inclusion scapes to determine geographic provenance where geologically determinable.
Treatment Detection
Exposing heating, beryllium diffusion, fissure oiling, resin-filling (emeralds), glass filling (rubies), dyeing, and irradiation treatments.
Quality Metrics
Detailed metrics regarding physical dimensions, optical transparency, and color descriptions based on standardized Munsell-style lighting methodologies.
Crucial Clarity for the Trade
A UGL Gemstone Report is an indispensable tool in the high-stakes trade and resale market.
Auction Houses
Our reports are relied upon by major auctioneers to establish provenance and authenticity before sale.
Retailers & Wholesalers
Jewelers use UGL gem reports to confidently price, market, and sell their colored stone inventory.
Insurance & Estate
Insurers and estate planners require credible gemstone documentation — UGL provides the gold standard.