Difference between revisions of "Phenakite"
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phenacite; beryllium silicate | phenacite; beryllium silicate | ||
| − | == | + | ==Physical and Chemical Properties== |
| − | Hexagonal systems with flat rhombohedral or long prismatic crystals. Good cleavage in one direction. Fracture = conchoidal to uneven. Luster = vitreous. Streak = colorless. Translucent to transparent. | + | * Hexagonal systems with flat rhombohedral or long prismatic crystals. Good cleavage in one direction. |
| + | * Fracture = conchoidal to uneven. | ||
| + | * Luster = vitreous. | ||
| + | * Streak = colorless. | ||
| + | * Translucent to transparent. | ||
| + | * Composition = Be2SiO4 | ||
| + | * Mohs Hardness = 7.5 - 8.0 | ||
| + | * Density = 2.97-3.00 g/ml | ||
| + | * Refractive Index = 1.654-1.670 | ||
| − | + | ==Resources and Citations== | |
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| − | + | *Mineralogy Database: [http://www.webmineral.com/data/Phenakite.shtml Phenakite] | |
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| − | Mineralogy Database: [http://www.webmineral.com/data/Phenakite.shtml Phenakite] | ||
[[Category:Materials database]] | [[Category:Materials database]] | ||
Latest revision as of 14:08, 24 August 2022
Description
A rare, highly refractive, beryllium silicate mineral that has been used as a gemstone. Phenakite occurs in the Ural Mountains, Norway (Kragerø), Brazil (Miguel de Piricicaba) and the U.S. (Colorado, Virginia). Phenakite can be colorless, pale yellow, pink or brown.
Synonyms and Related Terms
phenacite; beryllium silicate
Physical and Chemical Properties
- Hexagonal systems with flat rhombohedral or long prismatic crystals. Good cleavage in one direction.
- Fracture = conchoidal to uneven.
- Luster = vitreous.
- Streak = colorless.
- Translucent to transparent.
- Composition = Be2SiO4
- Mohs Hardness = 7.5 - 8.0
- Density = 2.97-3.00 g/ml
- Refractive Index = 1.654-1.670
Resources and Citations
- Mineralogy Database: Phenakite