20.87 CTS ALEXANDRITE ROUGH PARCEL RG-5286-raregems
- 存货单位
- 尺寸(毫米)
- 11.000 x 7.000 x 6.000mm
- 重量 (cts)
- 20.870
- Treatment
- No Treatment
- 颜色
-
ALEXANDRITE ROUGH PARCEL colour change
TANZANIA-MANGHOLA DUMAWANGA DISTRICT ARUSHA REGION
NICE GREEN CHANGES TO PURPLE/RED
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.
- 存货单位
- 尺寸(毫米)
- 11.000 x 7.000 x 6.000 mm
- 重量 (cts)
- 20.870
- Treatment
- No Treatment
- 颜色
-
ALEXANDRITE ROUGH PARCEL colour change
TANZANIA-MANGHOLA DUMAWANGA DISTRICT ARUSHA REGION
NICE GREEN CHANGES TO PURPLE/RED
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.
运输商 | 运送至:国家 | 运送到世界其他地区 |
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Standard Shipping - Tracked | $19.00 / :几天天 | $30.00 / :几天天 |
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Standard Shipping - Tracked 对包含 2 或更多商品的订单折扣为 $19.00
世界其他地区
Standard Shipping - Tracked 对包含 2 或更多商品的订单折扣为 $30.00
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FedEx | $39.00 / :几天天 | $40.00 / :几天天 |
:国家
FedEx 对包含 2 或更多商品的订单折扣为 $39.00
世界其他地区
FedEx 对包含 2 或更多商品的订单折扣为 $40.00
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DHL | $19.00 / :几天天 | $30.00 / :几天天 |
世界其他地区
DHL 对包含 2 或更多商品的订单折扣为 $30.00
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积极的
Beautiful stone! Thank you so much!
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积极的
Thanks so much. It was easy
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积极的
Nice can’t wait
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积极的
Very nice stone lots of color
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积极的
Paid and shipped - no feedback left after 100 days