| Name: | Actinolite Act |
| Specimens in Collection: |  #255: Actinolite Halliburton County, Ontario, Canada  #441: Actinolite  #683: Quartz / Actinolite Ecuador  #245: Uralite (Actinolite ps. After Diopside) Calumet Iron Mine, Chaffee County, Colorado, USA |
| IMA Chemistry: | [box]Ca2(Mg4.5-2.5Fe2+0.5-2.5)Si8O22(OH)2 |
| Chemistry Elements: | The mineral Actinolite contains elements: Calcium (Ca) Magnesium (Mg) Iron (Fe) Silicon (Si) Oxygen (O) Hydrogen (H) |
| Country of Type Locality: | Germany / Austria |
| Year First Published: | 1794 |
| IMA Status: | Approved,Redefined |
| Status Notes: | Originally named actynolite: Kirwan R (1794) 16th species: actynolite, in Elements of Mineralogy, 2nd Edition, Volume 1, Elmsly (London) 167-170 |
| Structural Group Name: | Amphibole |
| Fleischer's Group Name: | amphibole-group 2 Ca |
| Crystal Systems: | monoclinic |
| Oldest Known Age: | 4000 Million Years Ago |
| Mohs Hardness: | 5.5 |
| Diaphaneity: | 2.0 |
| Specific Gravity: | 1.05 |
| More Info: | Search Wikipedia: Actinolite (Wiki) Search Mindat: Actinolite Search Web Mineral DB: Actinolite |