48.90 CTS AMETRINE ROUGH PARCEL-PRE SHAPED-BOLIVIAN [F7577]

アイテム情報

寸法(mm) 14 x 12 x 9んん
重量(カラット) 48.9 カラット
処理...

QUALITY ROUGH

AMETRINE ROUGH

This is a  natural untreated rough pieces from Bolivia which is ready for cutting or keeping as a specimen.

We have cut some stones from this parcel which can be seen at our sister site

SEDA GEMS

Ametrine, also known as trystine or by its trade name as bolivianite, is a naturally occurring variety of  quartz . It is a mixture of amethyst and  citrine  with zones of purple and yellow or orange. Almost all commercially available ametrine is mined Bolivia although there are deposits being exploited in Brazil and India

The colour of the zones visible within ametrine is due to differing oxidation states iron within the crystal. The different oxidation states occur due to there being a temperature gradient across the crystal during its formation.

Artificial ametrine can be created by differential heat treatment of amethyst.

Most ametrine in the low price segment can surely be assumed to stem from synthetic material. Since 1994 a Russian laboratory has perfected the industrial production of bicolored quartz crystals that are later irradiated to bring out the typical ametrine colors. Green-yellow or golden-blue ametrine does not exist naturally.

 

QUALITY ROUGH

AMETRINE ROUGH

This is a  natural untreated rough pieces from Bolivia which is ready for cutting or keeping as a specimen.

We have cut some stones from this parcel which can be seen at our sister site

SEDA GEMS

Ametrine, also known as trystine or by its trade name as bolivianite, is a naturally occurring variety of  quartz . It is a mixture of amethyst and  citrine  with zones of purple and yellow or orange. Almost all commercially available ametrine is mined Bolivia although there are deposits being exploited in Brazil and India

The colour of the zones visible within ametrine is due to differing oxidation states iron within the crystal. The different oxidation states occur due to there being a temperature gradient across the crystal during its formation.

Artificial ametrine can be created by differential heat treatment of amethyst.

Most ametrine in the low price segment can surely be assumed to stem from synthetic material. Since 1994 a Russian laboratory has perfected the industrial production of bicolored quartz crystals that are later irradiated to bring out the typical ametrine colors. Green-yellow or golden-blue ametrine does not exist naturally.

 

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$95.00 USD

$350.00 セーブ $255

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

オークションID 784386
ウォッチャー 5ウォッチング
閲覧済み 1,515回
開始 23rd Jul 2018 8:55pm PDT

配送と保険

プロバイダー 運送 トランジット
FedEx $33.00 10日
Registered Shipping $16.00 21日
配送保険すべてのプロバイダーの$7.00 (オプション)

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