Tag Archives: disclosure

Pink zones in Mozambique tourmaline not diffusion

February 17, 2009

Surface-reaching growth tubes surrounded by intense pink ‘sleeves’ in Mozambique tourmaline is not the result of diffusion treatment, says the Gemological Institute of America (GIA).

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Blue Nile sued over emerald disclosure

December 15, 2008

A battle is brewing between online diamond retailers Yehuda Diamonds and Blue Nile Inc. over the sale of undisclosed treated emeralds.

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SSEF warns of synthetic red spinel

November 17, 2008

A resurgence in the demand for fine-quality red spinels may be the catalyst for the recent appearance of flux synthetics, says the SSEF Swiss Gemmological Institute.

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