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Gems Testing Lab - Real or fake certificates? - IGS Forums Hi all, I bought 2 faceted stones, supposedly Emerald and Fire Opal I measured the refractive index and thermal conductivity of both stones and it looks like the stones are cut from glass Has anyone seen such certificates that accompanied the stones? I think these are fake certificates Thank you for the feedback
Using Diamond Suspensions for Precision Finishing In fine grinding and polishing operations, especially on hard and brittle materials, choosing the right diamond suspensions can significantly impact surface finish quality, scratch control, and cycle time Consistent particle size and a stable carrier fluid help maintain uniform cutting action and avoid embedding or gouging at the final stages For reference on different suspension grades and
Fake emeralds, with fake lab certification - IGS Forums My first time on here, so be gentle Does any organization publish a list, or any sort of information regarding which gemological labs are legitimate businesses? I’m not asking which ones do the best work, or have the best standards, but rather which ones do, or do not issue completely phony certificates Three cases to illustrate This is the certificate that came with a 34 8 ct piece of
IGS Forums International Gem Society Community Forums