Stone Group Labs
A trade-only laboratory used in the United States for coloured stone testing and diamond verification.
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Founded in 1999 by Bear and Cara Williams. The current site names no report products and gives no address, so no city is recorded. It lists instrumentation including ED-XRF, FTIR, Raman and UV-Vis-NIR and describes these as aiding geographic origin work, but it does not state that the laboratory issues country-of-origin opinions. Report queries go through an enquiry form rather than an online lookup.
Sammensatt fra stonegrouplabs.com, les mer på 16. august 2026.
Vi kontrollerer forhandlere, ikke edelstener. En laboratorierapport beskriver én edelsten på ett bestemt tidspunkt; den er ikke en garanti for verdien, og det er ikke vår oppgave å stå inne for den.