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71.3 CTS ALEXANDRITE ROUGH TANZANIA COLOUR CHANGE TBM-1126
- 存貨單位
- 尺寸（毫米）
- 20.000 x 17.800 x 17.000mm
- 重量 (cts)
- 71.300
- Treatment
- No Treatment
- 類型
- Rough
- 顏色
-
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.
- 存貨單位
- 尺寸（毫米）
- 20.000 x 17.800 x 17.000 mm
- 重量 (cts)
- 71.300
- Treatment
- No Treatment
- 類型
- Rough
- 顏色
-
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.
| 運輸商 | 運送至：國家 | 運送到世界其他地區 |
|---|---|---|
| Standard Shipping - Tracked | $20.00 / ：幾天天 | $30.00 / ：幾天天 |
|
：國家
Standard Shipping - Tracked 對包含 2 或更多商品的訂單折扣為 $25.00
世界其他地區
Standard Shipping - Tracked 對包含 2 或更多商品的訂單折扣為 $30.00
|
||
| FedEx | $40.00 / ：幾天天 | $40.00 / ：幾天天 |
|
：國家
FedEx 對包含 2 或更多商品的訂單折扣為 $40.00
世界其他地區
FedEx 對包含 2 或更多商品的訂單折扣為 $40.00
|
||
| DHL | $30.00 / ：幾天天 | $30.00 / ：幾天天 |
|
世界其他地區
DHL 對包含 2 或更多商品的訂單折扣為 $30.00
|
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積極的Very pleased with the specimen and transaction
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積極的
Sweet Thank you
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中性的
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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積極的
Paid and shipped - no feedback left after 100 days
