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33.90 cts ALEXANDRITE ROUGH TANZANIA COLOUR CHANGE TBM-93
- SKU
- tbm-23
- 寸法(mm)
- 14.500 x 14.000 x 13.500mm
- 重さ (CT)
- 33.900
- Treatment
- No Treatment
- タイプ
- Rough
- 色
-
- ALEXANDERITE
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.
- SKU
- tbm-23
- 寸法(mm)
- 14.500 x 14.000 x 13.500 mm
- 重さ (CT)
- 33.900
- Treatment
- No Treatment
- タイプ
- Rough
- 色
-
- ALEXANDERITE
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.
| 配送業者 | 発送先:国 | その他の国への配送 |
|---|---|---|
| Standard Shipping - Tracked | $20.00 / :日日 | $30.00 / :日日 |
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：国
:数量以上のアイテムを含む注文では、:プロバイダーは $25.00 に割引されます
世界のその他の地域
:数量以上のアイテムを含む注文では、:プロバイダーは $30.00 に割引されます
|
||
| FedEx | $40.00 / :日日 | $40.00 / :日日 |
|
：国
:数量以上のアイテムを含む注文では、:プロバイダーは $40.00 に割引されます
世界のその他の地域
:数量以上のアイテムを含む注文では、:プロバイダーは $40.00 に割引されます
|
||
| DHL | $30.00 / :日日 | $30.00 / :日日 |
|
世界のその他の地域
:数量以上のアイテムを含む注文では、:プロバイダーは $30.00 に割引されます
|
||
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ポジティブPaid and shipped - no feedback left after 100 days
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ポジティブ
Very pleased with the specimen and transaction
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ポジティブ
Sweet Thank you
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中性
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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ポジティブ
Beautiful gemstone
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ポジティブ
Paid and shipped - no feedback left after 100 days
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