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$50.00 USD
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2

0.50cts Alexandrite Cab Catseye PG-4150 preciousgems

SKU
PG-4150
Dimenzije (mm)
4.800 x 3.300 x 2.100mm
Težina (cts)
0.500
Treatment
No Treatment
Tip
Cabochon
Shape
Oval
Boje

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
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Provjereno
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  • joslorand
    joslorand
    Pozitivan

    Just received them and they are exactly how they look in the video, lovely!

  • geologist
    geologist
    Pozitivan

    Paid and shipped - no feedback left after 100 days

  • tharealneo
    tharealneo
    Pozitivan

    Paid and shipped - no feedback left after 100 days

25.00%
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Vrijedi do
1st Nov 2024

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Detalji dostave

dostava:
$30.00 14 days putem Standard Shipping - Tracked
Brodovi iz:
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Pregled

Vrsta unosa : Standard
Identifikacijski broj proizvoda : 2239959
Počinje : 23rd October 2024 05:00 pm PDT
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