0.9 CTS ALEXANDRITE CAT EYES GEMSTONE TBM-945-trueblueminerals

アイテム情報

寸法(mm) 5.2 x 5.2 x 3.4んん
重量(カラット) 0.9 カラット
No Treatment
処理...

ALEXANDERITE

BI-COLOUR

TANZANIA-MANGHOLA DUMAWANGA DISTRICT ARUSHA REGION

NICE GREEN CHANGES TO PURPLE

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.

ALEXANDERITE

BI-COLOUR

TANZANIA-MANGHOLA DUMAWANGA DISTRICT ARUSHA REGION

NICE GREEN CHANGES TO PURPLE

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.

このテキストは機械翻訳されています。 オリジナルを表示しますか?
あなたはこのオークションに入札していません。

閉まっている

1 これまでに配置されたbid

$120 jan2020
気に入ったリストに追加する 質問する * USDすべての価格

監査情報

Gemstone Sheriffプログラムを使用すると、メンバーはオークションの監査をリクエストできます。監査は、アイテムの説明と写真の正確性を評価するGemologist

価格と詳細

入札の増分 $1
入札の開始 $149
オークションID 1529218
ウォッチャー 1ウォッチング
閲覧済み 171回
開始 8th Sep 2021 9:20am PDT
終了 8th Sep 2021 2:30pm PDT

配送と保険

プロバイダー 運送 トランジット
DHL $25.00 7日
FedEx $35.00 5日
配送保険すべてのプロバイダーの$20.42 (オプション)

あなたも好きかも