5.0 CTS -ALEXANDERITE ROUGH COLOR CHANGE RG-3180
- 存货单位
- 尺寸(毫米)
- 13.500 x 7.500 x 5.500mm
- 重量 (cts)
- 5.000
- Treatment
- No Treatment
- 类型
- Rough
- 颜色
-
ALEXANDERITE ROUGH colour change
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.
- 存货单位
- 尺寸(毫米)
- 13.500 x 7.500 x 5.500 mm
- 重量 (cts)
- 5.000
- Treatment
- No Treatment
- 类型
- Rough
- 颜色
-
ALEXANDERITE ROUGH colour change
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.
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 |
:国家
Standard Shipping - Tracked折扣至$19.00 ,适用于包含2或更多商品的订单
世界其他地区
Standard Shipping - Tracked折扣至$30.00 ,适用于包含2或更多商品的订单
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FedEx | $39.00 / :几天天 | $40.00 / :几天天 |
:国家
FedEx折扣至$39.00 ,适用于包含2或更多商品的订单
世界其他地区
FedEx折扣至$40.00 ,适用于包含2或更多商品的订单
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DHL | $19.00 / :几天天 | $30.00 / :几天天 |
世界其他地区
DHL折扣至$30.00 ,适用于包含2或更多商品的订单
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积极的
Just received my Ruby it’s a cute little thing. I believe my sister-in-law will like it took a minute to get here to the states, but I am happy with my purchase would buy from you again
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积极的
Great piece of emerald. I have already faceted a 2.5 carat gem from it. Thankyou
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积极的
Great colour change. Thankyou
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积极的
Much nicer in person than in the photo. I am happy to include these into my gemstone family!
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积极的
Beautiful gemstone