Lab Services

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As a well-trained researcher and gemologist in the San Francisco Bay Area, I utilize cutting-edge technology and scientific equipment to offer professional, independent, and objective service for gemstone identification, grading and appraising. Our 21 years experience and expertise allows us to accurately identify a wide range of gemstones, diamonds, jade (Fei Cui, Nephrite, turquoise, etc.,), and the purity of precious metals, providing reliable results for all your jewelry identification needs.

Diamond

With EXA diamond detector and diamond master stones, we can accurately identify both mined and lab-grown diamonds, determine the diamond’s 4Cs: Carat weight, Cut, Color, and Clarity.

Color Gemstones

Accurately identifying all kinds of color gemstones (ruby, sapphire, emeralad, etc): determining their mineral species, quality grade, any treatments, and distinguishing them from simulants

Fui Cui ( > Jadeite)

Raman, IR and V-VIS Spectra allow us to accurately identify the mineral composition of Fei Cui (a family name of Jadeite, Omphacite and Kosmochlor), the treatment (B+C Jade) and their color origin.

DALL·E 2024-09-04 23.19.03 - A detailed gold bar similar to the ones sold at Costco, featu

Metal Purity

With XRF spectra, we can accurately determine the purity and composition of precious metals (gold, silver, platinum, palladium, etc., ) in a completely nondestructive manner.