| Name: | Anorthite An |
| Specimens in Collection: |  #570: Anorthite Japan |
| IMA Chemistry: | Ca(Al2Si2O8) |
| Chemistry Elements: | The mineral Anorthite contains elements: Calcium (Ca) Aluminum (Al) Silicon (Si) Oxygen (O) |
| Country of Type Locality: | Italy |
| Year First Published: | 1823 |
| IMA Status: | Approved,Grandfathered |
| Status Notes: | Rose G (1823) Ueber den Feldspath, Albit, Labrador und Anorthit, Annalen der Physik und der Physikalischen Chemie 73, 173-208 |
| Structural Group Name: | Feldspar |
| Fleischer's Group Name: | feldspar |
| Crystal Systems: | triclinic|unknown |
| Oldest Known Age: | 4700 Million Years Ago |
| Mohs Hardness: | 6.0 |
| Diaphaneity: | 2.0 |
| Specific Gravity: | 2.735 |
| More Info: | Search Wikipedia: Anorthite (Wiki) Search Mindat: Anorthite Search Web Mineral DB: Anorthite |