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1032
8

0.30cts Alexandrite Cab Catseye PG-4157 preciousgems

SKU
PG-4157
Afmetingen (mm)
4.400 x 2.700 x 1.900mm
Gewicht (cts)
0.300
Treatment
No Treatment
Type
Cabochon
Shape
Oval
Kleuren

ALEXANDRITE

INDIA

BEAUTIFUL CATSEYE ROLL

COLOUR SHIFT

NICE GREEN CHANGES TO BROWNISH

TREATMENT-NONE

This rare gemstone is named after the Russian tsar Alexander II (1818-1881), the very first crystals having been discovered in April 1834 in the emerald mines near the River in the Urals. The discovery was made on the day the future tsar came of age. Although alexandrite is a relatively young gemstone, it certainly has a noble history. Since it shows both red and green, the principal colours of old Imperial Russia, it inevitably became the national stone of tsarist Russia.

Alexandrite is very scarce: this is due to its chemical composition. It is basically a chrysoberyl, a mineral consisting of colourless or yellow transparent chrysoberyl, chrysoberyl cat’s eye and colour-changing alexandrite (also in cat’s eye varieties). It differs from other chrysoberyls in that it not only contains iron and titanium, but also chromium as a major impurity. And it is this very element which accounts for the spectacular colour change. Rarely, vanadium may also play a part. According to CIBJO nomenclature, only chrysoberyls displaying a distinct change of colour may be termed alexandrite.

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preciousgems
preciousgems
wholesaler quality stones- TRADING SINCE 1995----All items are shipped from our Australian Head Office
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    joslorand
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    Just received them and they are exactly how they look in the video, lovely!

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    remygem
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Vermeldingstype : Standard
Product-ID : 2239971
Begint : 6th November 2024 04:35 pm PST
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