GRS announces that it has completed its research on “Paraiba tourmalines”. Paraiba tourmaline is a Cuprian-Elbaite of “neon-colors” of pastel greenish-blue to blue hue from the origin of Brazil (lit. 1). Such tourmalines, however, have recently become known from various other origins. The trade had to settle the question whether these tourmalines from these different […]
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The colour of the Be-treated sapphire matches other types of conventional heated sapphires (low to medium tone, medium saturation, not dark, no greenish overtone, good transparency and brilliancy). The identification occurred during routine Beryllium-testing at GRS. Testing in immersion did show a slight discoloration from blue to grey in the rim of the sapphire. No […]
A faceted approx. 1 ct Be-treated blue sapphire (acquired 2 weeks ago from the market, sold as Be-treated) was cut in half. The half-cut sapphire provided the possibility of measuring the penetration of the Beryllium into the sapphires body (length 5mm and with 3mm). Two profiles were measured across the sample perpendicular to each other, […]
Dr.A. Peretti receives the title of a European Geologist, Euro.Geol from the Federation of European Geologists. The title is a strongly protected professional title including checks CDP (Conitnuous Professional Development). It is mentioned in the GRS gemmological reports in the future as “European Geologist” or EurGeol togehter with the gemmological titles “FGG” and “FGA”.