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184.5 CTS ALEXANDRITE ROUGH TANZANIA COLOUR CHANGE TBM-1124
- 存货单位
- 尺寸(毫米)
- 27.500 x 26.400 x 22.000mm
- 重量 (cts)
- 184.500
- Treatment
- No Treatment
- 类型
- Rough
- 颜色
-
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.
- 存货单位
- 尺寸(毫米)
- 27.500 x 26.400 x 22.000 mm
- 重量 (cts)
- 184.500
- Treatment
- No Treatment
- 类型
- Rough
- 颜色
-
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.
运输商 | 运送至:国家 | 运送到世界其他地区 |
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Standard Shipping - Tracked | $20.00 / :几天天 | $30.00 / :几天天 |
:国家
Standard Shipping - Tracked 对包含 2 或更多商品的订单折扣为 $25.00
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 | $40.00 / :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 $40.00
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 | $30.00 / :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
Paid and shipped - no feedback left after 100 days
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积极的
Very pleased with the specimen and transaction
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积极的
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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积极的
Beautiful gemstone
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积极的
Paid and shipped - no feedback left after 100 days
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Comments
The Verified Seller responsible for this item has diligently provided us with accurate and comprehensive information, encompassing crucial details such as weight, dimensions, and treatment. It is important to reiterate our commitment to upholding the highest standards of integrity and transparency in the gemstone industry. As part of our policy, we strictly permit the sale of exclusively natural gemstones that have been sourced directly from the Earth. However, in the event that a gemstone has undergone any form of treatment, it is mandatory for the seller to provide full disclosure regarding the treatment process. Furthermore, we would like to emphasize that man-made gemstones, including simulants and imitations, are strictly prohibited on our platform. We prioritize the promotion of authentic, natural gemstones to ensure a genuine and trustworthy marketplace for our valued customers. Should you have any further inquiries or require additional assistance, please do not hesitate to reach out. We are here to assist you and provide a seamless experience on Gem Rock Auctions.