| Mineral | TREMOLITE |
| Chemistry | [][Ca 2 ][Mg 5 ][(OHF)|Si 4 O 11 ] 2 |
| Color | white brown colourlessgreylight Green |
| Luster | Vitreous |
| CrystalSystem | Monoclinic |
| CrystalHabits | include flattened prismatic and elongated crystals with a dome-like termination that is actually two of the four faces of a prism.Fibrous crystals form radial aggregates, masses and hair like clusters.Also as a felted mass (asbestos and mountain leather ). |
| Cleavage | Distinct/Good on {110} |
| Hardness | 5 - 6 |
| Streak | white |
| Characteristics | Index of refraction is 1.60 - 1.63. |
| Occurences | include the area around Wilberforce, Ontario, Canada; De Kalb, St Lawrence Co., New York, California, Arizona and Canaan, Connecticut, USA; Tyrol and Piemonte, Italy; Tremola Valley, Switzerland (hence the name); Tanzania and Finland. |
| Indicators | fibrosity (asbestos), color, cleavage, crystal habit and hardness. |
| DensityNote | very slightly aboveaverage for translucent mineral |
| IMAStatus | Approved - Published prior to 1959 (pre-IMA) - Gra |
| CellParameters | a = 9.84b = 18.02c = 5.27 β=104.95° |
| Ratio | a:b:c = 0.546 : 1 : 0.292 |
| OpticalType | Biaxial (-) |
| RI | n α =1.599 - 1.612 n β =1.613 - 1.626 n |
| Birefringence | δ=0.026 |
| SurfaceRelief | Moderate |
| Strunz | 8/F.10-10 8 : Silicates F : Inosilicates (chain and band) double chains [Si2O6]4- 10 : Amphibole groupTremolite - Sadanagaite series |
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