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35.75 CTS ALEXANDRITE ROUGH TANZANIA COLOUR CHANGE TBM-1125
- SKU
- Dimensions (mm)
- 21.300 x 13.700 x 9.100mm
- Weight (cts)
- 35.750
- Treatment
- No Treatment
- Type
- Rough
- Colours
-
ALEXANDERITE ROUGH
BI-COLOUR
TANZANIA-MANGHOLA DUMAWANGA DISTRICT ARUSHA REGION
NICE GREEN CHANGES TO PURPLE
IDEAL FOR CABBING
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.
- SKU
- Dimensions (mm)
- 21.300 x 13.700 x 9.100 mm
- Weight (cts)
- 35.750
- Treatment
- No Treatment
- Type
- Rough
- Colours
-
ALEXANDERITE ROUGH
BI-COLOUR
TANZANIA-MANGHOLA DUMAWANGA DISTRICT ARUSHA REGION
NICE GREEN CHANGES TO PURPLE
IDEAL FOR CABBING
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.
| Shipping provider | Shipping to Australia | Shipping to rest of world |
|---|---|---|
| Standard Shipping - Tracked | $20.00 / 7 days | $30.00 / 14 days |
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Australia
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Rest of the world
Standard Shipping - Tracked is discounted to $30.00 on orders with 2 or more items
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| FedEx | $40.00 / 3 days | $40.00 / 7 days |
|
Australia
FedEx is discounted to $40.00 on orders with 2 or more items
Rest of the world
FedEx is discounted to $40.00 on orders with 2 or more items
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| DHL | $30.00 / 2 days | $30.00 / 21 days |
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Rest of the world
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rare large gemstones and minerals.
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Negativeunfortunately the colors in person under artificial or natural light look nothing like the ones posted on the listing. The stone appears very dark blue and it is hard to guess it is a parti sapphire.
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Positive
Amazing stone!
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Positive
Love it!
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Positive
Paid and shipped - no feedback left after 100 days
