Opals
Gemstones
Jewelry
Coins
No has pujado en esta subasta.
4.75-CTS DUMORTIERITE ROUGH SPECIMEN RARE MINERAL RG-4215 RAREGEMS
- SKU
- RG-4215
- Dimensiones (mm)
- 14.8 x 6.5 x 6.2mm
- Peso (cts)
- 4.75
- Treatment
- No Treatment
- Type
- Specimen
- Colores
-
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
| Proveedor de envío | Envío a Australia | Envíos al resto del mundo | Envío combinado ( Australia ) | Envío combinado (resto del mundo) |
|---|---|---|---|---|
| Standard Shipping - Tracked |
|
|
|
|
| FedEx |
|
|
|
|
| DHL |
|
|
|
|
- SKU
- RG-4215
- Dimensiones (mm)
- 14.8 x 6.5 x 6.2 mm
- Peso (cts)
- 4.75
- Treatment
- No Treatment
- Type
- Specimen
- Colores
-
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
| Proveedor de envío | Envío a Australia | Envíos al resto del mundo | Envío combinado ( Australia ) | Envío combinado (resto del mundo) |
|---|---|---|---|---|
| Standard Shipping - Tracked |
|
|
|
|
| FedEx |
|
|
|
|
| DHL |
|
|
|
|
-
PositivoGreat specimen. Good size & colour Best Thumbnail I've seen in 35 years of collecting Can you provide details regarding location of find?
-
Positivo
Happy with purchase, arrived today. Thank you
-
Positivo
Happy with purchase, arrived today. Thank you
-
Positivo
Happy with purchase , arrived today. Thank you
-
Positivo
Many thanks.
¿Por qué los usuarios se superan a sí mismos?
Cuando se realiza una oferta, este es el monto máximo que una persona está dispuesta a ofertar por el producto. Nuestro sistema ofertará automáticamente en nombre del postor y aumentará la oferta de manera gradual hasta el máximo para mantener su posición como el mejor postor.
Cuando hay un ícono que indica "Oferta automática", significa que nuestro sistema está realizando ofertas de forma activa para el postor en función de su oferta máxima. Esto puede parecer como si los postores estuvieran pujando más que ellos mismos, pero es simplemente el resultado de que el sistema actualiza la oferta para reflejar el límite máximo del postor.
