Tremolite is a mineral of the amphibole group from metasomatic and metamorphic rocks. It has a number of varieties, including tremolite-asbestos and jade.
You can see tremolite stone for sale and buy it in the Minerals of Russia online store.
General | |
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Category | Inosilicates |
Formula (repeating unit) |
Ca2(Mg5.0-4.5Fe2+0.0-0.5)Si8O22(OH)2 |
IMA symbol | Tr |
Strunz classification | 9.DE.10 |
Crystal system | Monoclinic |
Crystal class | Prismatic (2/m) (same H-M symbol) |
Space group | C2/m (no. 12) |
Unit cell | a = 9.84 Å, b = 18.02 Å c = 5.27 Å; β = 104.95°; Z = 2 |
Identification | |
Color | White, gray, lavender to pink, light green, light yellow |
Crystal habit | Elongated prismatic, or flattened crystals; also as fibrous, granular or columnar aggregates |
Twinning | Simple or multiple, common parallel to {100}; rarely parallel to {001} |
Cleavage | Perfect on {110} at 56° and 124°; partings on {010} and {100} |
Tenacity | Brittle |
Mohs scale hardness | 5 – 6 |
Luster | Vitreous and silky |
Streak | White |
Diaphaneity | Transparent to translucent |
Specific gravity | 2.99 – 3.03 |
Optical properties | Biaxial (-) |
Refractive index | nα = 1.599 - 1.612 nβ = 1.613 - 1.626 nγ = 1.625 - 1.637 |
Birefringence | δ = 0.026 |
2V angle | Measured: 86° to 88° |
Ultraviolet fluorescence | Short UV=yellow, Long UV=range pink |