AAA Richterite Sugilite Cabochon 5.30ct Gel AAA Richterit Sugilith Cabochon
| Sugilite | |
|---|---|
| Sugilite from Wessels Mine in Northern Cape Province , South Africa | |
| General | |
| Category | Cyclosilicate |
| Formula (repeating unit) | K Na 2(Fe ,Mn ,Al )2Li 3Si 12O 30 |
| Strunz classification | 09.CM.05 |
| Dana classification | 63.02.01a.09 |
| Crystal symmetry | Hexagonal |
| Identification | |
| Formula mass | 1,041.66 |
| Color | Light brownish-yellow, purple, violet, reddish violet, pale pink, colourless |
| Crystal habit | Granular |
| Mohs scale hardness | 6–6½ |
| Luster | Vitreous |
| Streak | White |
| Diaphaneity | Transparent to translucent |
| Specific gravity | 2.74 |
| References | [1] [2] |
Sugilite (also known as lavulite ) is a relatively rare pink to purple cyclosilicate mineral with the complex chemical formula K Na 2(Fe ,Mn ,Al )2Li 3Si 12O 30. Sugilite crystallizes in the hexagonal system with prismatic crystals. The crystals are rarely found and the form is usually massive. It has a Mohs hardness of 5.5 to 6.5 and a specific gravity of 2.75 to 2.80. It is mostly translucent.
Sugilite was first described in 1944 by the Japanese petrologist Ken-ichi Sugi (1901–1948) for an occurrence on Iwagi Islet, Japan , where it is found in an aegirine syenite intrusive stock. It is found in a similar environment atMont Saint-Hilaire , Quebec , Canada . In the Wessels mine in northern Cape Province of South Africa , sugilite is mined from a strata-bound manganese deposit. It is also reported from Liguria and Tuscany , Italy ; New South Wales , Australia and Madhya Pradesh , India .
Note: The mineral is commonly pronounced with a soft "g", as in "ginger". However, as with most minerals, its pronunciation is intended to be the same as the person it is named after; in this case, the Japanese name Sugi has a hard "g", as in "geese": / ˈ s uː ɡ ɨ l aɪ t / soo -gi-lyt .
Contents [hide ] |
Gallery [edit ] -
A rich thumber of pretty purple sugilite on a matrix of bladed barite crystals, Wessels Mine inNorthern Cape Province , South Africa , size: 2.4 x 2.1 x 1.2 cm.
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Sugilite tile
See also [edit ]
A rich thumber of pretty purple sugilite on a matrix of bladed barite crystals, Wessels Mine inNorthern Cape Province , South Africa , size: 2.4 x 2.1 x 1.2 cm.
Sugilite tile
| Earth sciences portal |
- Classification of minerals
- List of minerals
- List of minerals named after people
References [edit ] - ^ Webmineral
- ^ Mindat.org
External links [edit ]
| Wikimedia Commons has media related to: Sugilite |
- R. V. Dietrich
- Mineral galleries
- MSA Handbook PDF
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- Potassium minerals
- Sodium minerals
- Iron minerals
- Manganese minerals
- Aluminium minerals
- Lithium minerals
- Cyclosilicates
- Gemstones
- Condition: Neuf : autre (voir les détails)
- Stein: Richterite
- Farbe: Blue Purple
- Reinheit: AAA Gel
- Gewicht: 5.50ct
- Schliff: Cabochon Drop
- Gel Richterite Sugilite: Gel Qualität Richterit Sugilith
PicClick Insights - AAA Richterite Sugilite Cabochon 5.30ct Gel AAA Richterit Sugilith Cabochon PicClick Exclusif
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