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

物品信息

尺寸(毫米) 14 x 12 x 9毫米
重量(克拉) 48.9 克拉
颜色
加工...

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 节省 $255

审计信息

Gemstone Sheriff计划允许我们的会员请求对任何拍卖进行审核,该审核由独立的Gemologist完成,他会评估项目描述和图片的准确性。

定价和详细信息

拍卖编号 784386
观察者 5看
看过 1,616次
开始 23rd Jul 2018 8:55pm PDT

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