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$340.00 USD
价格

2.2 ct. Color Change Garnet Oval Cut

1243
0

存货单位
#14480
尺寸(毫米)
8.900 x 7.000 x 4.300mm
重量 (cts)
2.220
Treatment
No Treatment
Clarity
SI
类型
Faceted
Shape
Oval
颜色

COLOR CHANGE GARNET

Origin: Madagascar

Color: Color-change

The color changing garnet is a rare and precious garnet from the Pyralspites series, which is a series made up of the Pyrope Garnet, the Almandine Garnet and the Spessartite Garnet. This color-changing Garnet hybrid is predominantly composed of Pyrope Garnet, Spessartite Garnet and impurities of chromium and / or vanadium.

Physical and optical properties of Garnet color change

Color-changing garnets are found in the form of small pebbles (alluviums), grainy aggregates and crystals. Under natural daylight conditions, its color can be blue-green, green, blue (rare), green-gray, brown, beige. It is a mineral species in which we very often find minerals in inclusions, such as Rutile and Apatite to name a few. Large gem-quality stones that appear clean to the naked eye are extremely rare. Color-changing garnet is a stone that is not subject to any treatment or improvement of any kind, which is a good point for buyers. In the color changing garnets of the Pyralspites series, the coloring is generally due to manganese (Mn2 +) in the case of orange-colored stones and to iron (Fe2 +) in the case of red to pink stones. The color change, meanwhile, occurs when the gem contains vanadium (V3 +) or chromium (Cr3 +).

Cause of color change

The Garnet color changer has the ability to change color depending on the type of light source. The intensity of the color change phenomenon can be truly spectacular, much more than the change that can be observed among the majority of Alexandrians. Most of the color-changing garnets therefore present, under normal conditions of daylight observation, as we indicated above, the following colors: blue-green, green, blue (rare), green-gray, brown , beige, bronze. And can become, when viewed in incandescent light: pink, pink-orange to red, yellow-greenish, red-pink, light red, purple red, blood red, bluish green, light purple. The majority of color-changing garnets come mainly from Tanzania, Kenya, Sri Lanka and Madagascar. The color-changing garnet, commercially called Grenat Malaya or Grenat Malaia, has only been discovered to date in Africa and Madagascar (Bekily).

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SHIPPING & RETURNS

$9.50 for registered post with insurance and signature at the delivery - Trackable (delivery 15-30 days average).

Refund Policy – all wins have a 7 day period for return if the buyer is not 100% satisfied with their purchase - Return Postage to be paid by the buyer.

We do not offer combining for No Reserve Auctions.

All payments are expected within 2 days after auction is closed.

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gemcod
gemcod
All kind of Madagascar gemstones & cabochon. Operation in FRANCE. We ship worldwide by registered priority mail with signature.
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  • nrwalker
    nrwalker
    积极的

    Very nice, thank you!

  • skarastu
    skarastu
    积极的

    Nice tourmaline. Multiple layers of different colors,

  • lorraine0313
    lorraine0313
    积极的

    Paid and shipped - no feedback left after 100 days

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发货自:
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概述

列表类型 : Standard
产品编号 : 2136318
开始 : 10th December 2024 11:01 pm PST
* 所有价格均以:货币为单位