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1.65 CTS ALEXANDRITE CAT EYES GEMSTONE TBM- 940-TRUEBLUEMINERALS
- SKU
- TBM-940
- Dimensiones (mm)
- 6.200 x 6.200 x 4.300mm
- Peso (cts)
- 1.650
- Treatment
- No Treatment
- Tipo
- Cabochon
- Colores
-
ALEXANDERITE
BI-COLOUR
TANZANIA-MANGHOLA DUMAWANGA DISTRICT ARUSHA REGION
NICE GREEN CHANGES TO PURPLE
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
- TBM-940
- Dimensiones (mm)
- 6.200 x 6.200 x 4.300 mm
- Peso (cts)
- 1.650
- Treatment
- No Treatment
- Tipo
- Cabochon
- Colores
-
ALEXANDERITE
BI-COLOUR
TANZANIA-MANGHOLA DUMAWANGA DISTRICT ARUSHA REGION
NICE GREEN CHANGES TO PURPLE
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.
| Proveedor de envío | Envío a: país | Envíos al resto del mundo |
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| Standard Shipping - Tracked | $20.00 / :días días | $30.00 / :días días |
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| FedEx | $40.00 / :días días | $40.00 / :días días |
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:país
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Resto del mundo
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| DHL | $30.00 / :días días | $30.00 / :días días |
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Resto del mundo
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PositivoVery pleased with the specimen and transaction
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Positivo
Sweet Thank you
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Neutral
Responsive seller, which is appreciated. Lovely gem. The only issue was with shipping. I paid for post but it was sent via Fedex. Fedex (of course) charged me illegal fees over a month after delivery! This was why I chose post and not Fedex.
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Positivo
Paid and shipped - no feedback left after 100 days
