Monthly Archives: January 2014

GIA v EGL certs

With respect to the GIA v EGL cert issue: GIA (Gemological Institute of America) www.gia.edu, a non-profit educational institution, invented a diamond grading scale in the 1950s. This scale describes diamond quality in terms of color on a scale of … Continue reading

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Trigon formation in a natural pink diamond from Mirny, Republic of Sakha, Siberia, Russia.

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Chrysoberyl crystal in the form of a star

Chrysoberyl crystal in the form of a star. Collection: D. Preite. Photo: M.Chinellato

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