7CTS DUMORTIERITE ROUGH SPECIMEN RARE MINERAL RG-4216 RAREGEMS
- SKU
- RG-4216
- Afmetingen (mm)
- 19.600 x 7.700 x 7.400mm
- Gewicht (cts)
- 7.000
- Treatment
- No Treatment
- Type
- Specimen
- Kleuren
-
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
- SKU
- RG-4216
- Afmetingen (mm)
- 19.600 x 7.700 x 7.400 mm
- Gewicht (cts)
- 7.000
- Treatment
- No Treatment
- Type
- Specimen
- Kleuren
-
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
Verzend provider | Verzending naar Australia | Verzending naar de rest van de wereld |
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Standard Shipping - Tracked | $19.00 / 7 | $30.00 / 14 |
Australia
Standard Shipping - Tracked krijgt korting op $19.00 bij bestellingen met 2 of meer artikelen
Rest van de wereld
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FedEx | $39.00 / 4 | $40.00 / 4 |
Australia
FedEx krijgt korting op $39.00 bij bestellingen met 2 of meer artikelen
Rest van de wereld
FedEx krijgt korting op $40.00 bij bestellingen met 2 of meer artikelen
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DHL | $19.00 / 2 | $30.00 / 14 |
Rest van de wereld
DHL krijgt korting op $30.00 bij bestellingen met 2 of meer artikelen
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Positief
Great quality and price! Item arrived on time. Will purchase from seller again.
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Positief
Good quality for price.
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Positief
Good experience with seller. Items arrived on time and as described for a good price.