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4.75-CTS DUMORTIERITE ROUGH SPECIMEN RARE MINERAL RG-4215 RAREGEMS
- SKU
- RG-4215
- Dimensioni (mm)
- 14.8 x 6.5 x 6.2mm
- Peso (cts)
- 4.75
- Treatment
- No Treatment
- Type
- Specimen
- Colori
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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
| Fornitore di spedizioni | Spedizione a Australia | Spedizione nel resto del mondo | Spedizione combinata ( Australia ) | Spedizione combinata (resto del mondo) |
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- SKU
- RG-4215
- Dimensioni (mm)
- 14.8 x 6.5 x 6.2 mm
- Peso (cts)
- 4.75
- Treatment
- No Treatment
- Type
- Specimen
- Colori
-
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
| Fornitore di spedizioni | Spedizione a Australia | Spedizione nel resto del mondo | Spedizione combinata ( Australia ) | Spedizione combinata (resto del mondo) |
|---|---|---|---|---|
| Standard Shipping - Tracked |
|
|
|
|
| FedEx |
|
|
|
|
| DHL |
|
|
|
|
raregems, all rough.
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PositivoGreat specimen. Good size & colour Best Thumbnail I've seen in 35 years of collecting Can you provide details regarding location of find?
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Positivo
Happy with purchase, arrived today. Thank you
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Positivo
Happy with purchase, arrived today. Thank you
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Positivo
Happy with purchase , arrived today. Thank you
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Positivo
Many thanks.
Perché gli utenti superano se stessi?
Quando viene fatta un'offerta, questo è l'importo massimo che una persona è disposta a offrire per il prodotto. Il nostro sistema farà quindi automaticamente un'offerta per conto dell'offerente, aumentando gradualmente l'offerta fino al massimo per mantenere la sua posizione di miglior offerente.
Quando c'è un'icona che indica "Offerta automatica", significa che il nostro sistema sta attivamente piazzando offerte per l'offerente in base alla sua offerta massima. Questo potrebbe sembrare come se gli offerenti stessero superando se stessi, ma è semplicemente il risultato del sistema che aggiorna l'offerta per riflettere il limite massimo degli offerenti.
