7CTS DUMORTIERITE ROUGH SPECIMEN RARE MINERAL RG-4216 RAREGEMS
- 存货单位
- RG-4216
- 尺寸(毫米)
- 19.600 x 7.700 x 7.400mm
- 重量 (cts)
- 7.000
- Treatment
- No Treatment
- 类型
- Specimen
- 颜色
-
DUMORTIERITE
NICE PALE BLUE COLOUR
FINE CRYSTAL SPECIMEN
Dumortierite is a fibrous variably coloured aluminium boro-silicate mineral, Al7BO3(SiO4)3O3. Dumortierite crystallizes in the orthorhombic system typically forming fibrous aggregates of slender prismatic crystals. The crystals are vitreous and vary in color from brown, blue, and green to more rare violet and pink. Substitution of iron and other tri-valent elements for aluminium result in the color variations. It has a Mohs hardness of 7 and a specific gravity of 3.3 to 3.4. Crystals show pleochroism from red to blue to violet. Dumortierite quartz is blue colored quartzcontaining abundant dumortierite inclusions.
Dumortierite was first described in 1881 for an occurrence in Chaponost, in the Rhône-Alps of France and named for the French paleontologist Eugène Dumortier (1803–1873).[4] It typically occurs in high temperature aluminium rich regional metamorphic rocks, those resulting from contact metamorphism and also in boron rich pegmatites. The most extensive investigation on dumortierite was done on samples from the high grade metamorphic Gfohl unit in Austria by Fuchs et al. (2005).
It is used in the manufacture of high grade porcelain. It is sometimes mistaken for sodalite and has been used as imitation lapis lazuli.
Sources of Dumortierite include Austria, Brazil, Canada, France, Italy, Madagascar, Namibia, Nevada, Norway, Peru, Poland, Russia and Sri Lanka.
TRADING AS TRUEBLUEOPALS / LIGHTNINGOPALS LLC
- 存货单位
- RG-4216
- 尺寸(毫米)
- 19.600 x 7.700 x 7.400 mm
- 重量 (cts)
- 7.000
- Treatment
- No Treatment
- 类型
- Specimen
- 颜色
-
DUMORTIERITE
NICE PALE BLUE COLOUR
FINE CRYSTAL SPECIMEN
Dumortierite is a fibrous variably coloured aluminium boro-silicate mineral, Al7BO3(SiO4)3O3. Dumortierite crystallizes in the orthorhombic system typically forming fibrous aggregates of slender prismatic crystals. The crystals are vitreous and vary in color from brown, blue, and green to more rare violet and pink. Substitution of iron and other tri-valent elements for aluminium result in the color variations. It has a Mohs hardness of 7 and a specific gravity of 3.3 to 3.4. Crystals show pleochroism from red to blue to violet. Dumortierite quartz is blue colored quartzcontaining abundant dumortierite inclusions.
Dumortierite was first described in 1881 for an occurrence in Chaponost, in the Rhône-Alps of France and named for the French paleontologist Eugène Dumortier (1803–1873).[4] It typically occurs in high temperature aluminium rich regional metamorphic rocks, those resulting from contact metamorphism and also in boron rich pegmatites. The most extensive investigation on dumortierite was done on samples from the high grade metamorphic Gfohl unit in Austria by Fuchs et al. (2005).
It is used in the manufacture of high grade porcelain. It is sometimes mistaken for sodalite and has been used as imitation lapis lazuli.
Sources of Dumortierite include Austria, Brazil, Canada, France, Italy, Madagascar, Namibia, Nevada, Norway, Peru, Poland, Russia and Sri Lanka.
TRADING AS TRUEBLUEOPALS / LIGHTNINGOPALS LLC
运输商 | 运送至:国家 | 运送到世界其他地区 |
---|---|---|
Standard Shipping - Tracked | $19.00 / :几天天 | $30.00 / :几天天 |
:国家
Standard Shipping - Tracked折扣至$19.00 ,适用于包含2或更多商品的订单
世界其他地区
Standard Shipping - Tracked折扣至$30.00 ,适用于包含2或更多商品的订单
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FedEx | $39.00 / :几天天 | $40.00 / :几天天 |
:国家
FedEx折扣至$39.00 ,适用于包含2或更多商品的订单
世界其他地区
FedEx折扣至$40.00 ,适用于包含2或更多商品的订单
|
||
DHL | $19.00 / :几天天 | $30.00 / :几天天 |
世界其他地区
DHL折扣至$30.00 ,适用于包含2或更多商品的订单
|
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积极的
Great quality and price! Item arrived on time. Will purchase from seller again.
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积极的
Good quality for price.
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积极的
Good experience with seller. Items arrived on time and as described for a good price.