SSEF: New Criteria to Detect Low-T Heated Pink Sapphires

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New and additional criteria to detect low-T heated pink sapphires applied by SSEF In the Swiss Gemmological Institute SSEF's newsletter last week, new and additional...

An Unusual Pearl: Coated or not?

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Roskin Gem News ReportGary Roskin Conch Pearl: Coated, or not? Identification of pearl coatings can be a bit tricky, especially if the coating has been performed...

GIA Alumni: Continuing Education

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Learn from GIA's best. Continuing education sponsored by the GIA Alumni Collective

In Conversation with a Lapidary Historian

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Lauriane Lognay sits down with Justin K. Prim Tap here to read the full story at Jewellery Business Magazine.

2022 CGA Gem Conference

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2022 CGA Gem Conference, October 21-23 – Vancouver, BC Over the next several weeks, the Roskin Gem News will feature the guest speakers who presented...

Ti Surface Diffusion: Just when you thought it was an easy identification

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New research shows that the titanium surface diffusion treatment is being polished off the facets, but left inside cavities and fractures. Stone Group...

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GEM-A Issues Warning: SCAM Alert!

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GEM-A Issues Warning to Members and Public as Scam Products Bearing False Credentials Continue to Circulate World-renowned provider of gemstone education is urging vigilance after...