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25/06/2022 04:05 pm

161.90CTS ALEXANDRITE ROUGH TANZANIA COLOUR CHANGE TBM-1553

存货单位
尺寸(毫米)
29.000 x 21.000 x 21.000mm
重量 (cts)
161.900
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
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
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
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

trueblueminerals
trueblueminerals
rare large gemstones and minerals
:城市,国家
已验证
:总反馈

  • 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.

  • olga22220
    olga22220
    积极的

    Paid and shipped - no feedback left after 100 days

  • hippu65
    hippu65
    积极的

    Been watching this for some time.. Got me a deal..! Great !

20%
优惠券代码 thanksgiving
有效期至
30th Nov 2024

审计

Gemstone Sheriff计划允许我们的会员请求对任何产品进行审核,该审核由独立的 Gemologist 人员完成,该资格人员评估商品描述和图片的准确性。

送货细节

船运:
$30.00 :通过 Standard Shipping - Tracked 计算天数
发货自:
Australia

付款方式

  • stripe

概述

列表类型 : Standard
产品编号 : 824630
开始 : 24th June 2022 07:10 pm PDT
* 所有价格均以:货币为单位