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$1,200.00 USD
Precio
Cerrado
15/07/2021 09:11 am

24 CTS ALEXANDRITE ROUGH TANZANIA COLOUR CHANGE TBM-707

SKU
Dimensiones (mm)
17.000 x 13.000 x 12.000mm
Peso (cts)
24.000
Treatment
No Treatment
Tipo
Rough
Colores

ALEXANDERITE ROUGH   colour change

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.

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trueblueminerals
trueblueminerals
rare large gemstones and minerals
:Ciudad, País
Verificado
805 de comentarios

  • setillia
    setillia
    Neutral

    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
    Positivo

    Paid and shipped - no feedback left after 100 days

  • hippu65
    hippu65
    Positivo

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

20%
Código promocional thanksgiving
Válido hasta
30th Nov 2024

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Comments

The Verified Seller has provided accurate and complete information for this gemstone including weight, dimensions and treatments where applicable.

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Detalles de envío

Envío:
$30.00 :cuenta días a través de :proveedor
Se envía desde:
Australia

Opciones de pago

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Descripción general

Tipo de listado : Standard
ID del Producto : 713240
Empieza : 14th July 2021 11:20 pm PDT
* Todos los precios están en :moneda