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$320.00 USD
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29/08/2022 03:39 pm

ALEXANDRITE ROUGH TANZANIA COLOURCHANGE 10.70 CTS TBM-586

存貨單位
尺寸(毫米)
13.000 x 11.000 x 8.000mm
重量 (cts)
10.700
Treatment
No Treatment
類型
Rough
顏色

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.

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

trueblueminerals
trueblueminerals
rare large gemstones and minerals
:城市,國家
已驗證
:總反饋

  • peketrain
    peketrain
    積極的

    Very pleased with the specimen and transaction

  • setillia
    setillia
    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.

  • bainesrh
    bainesrh
    積極的

    Beautiful gemstone

  • olga22220
    olga22220
    積極的

    Paid and shipped - no feedback left after 100 days

審計

Gemstone Sheriff計劃允許我們的會員請求對任何產品進行審核,該審核由獨立的 Gemologist 人員完成,該資格人員評估商品描述和圖片的準確性。

送貨細節

船運:
$30.00 :通過 Standard Shipping - Tracked 計算天數
發貨自:
Australia

付款方式

  • stripe

概述

列表類型 : Standard
產品編號 : 997871
開始 : 17th August 2022 11:48 pm PDT
* 所有價格均以:貨幣為單位