| Name: | Orthoclase Or |
| Specimens in Collection: |  #1129: Orthoclase var. Moonstone/Sunstone (Tumbled)  #184: Orthoclase / Mica China |
| IMA Chemistry: | K(AlSi3O8) |
| Chemistry Elements: | The mineral Orthoclase contains elements: Potassium (K) Aluminum (Al) Silicon (Si) Oxygen (O) |
| Country of Type Locality: | unknown |
| Year First Published: | 1823 |
| IMA Status: | Approved |
| Status Notes: | Breithaupt J F A (1823) Feldspath. Orthoklas, in Vollständige Charakteristik des Mineral-Systems., Arnoldischen Buchhandlung (Dresden) 271-275 |
| Structural Group Name: | Feldspar |
| Fleischer's Group Name: | feldspar |
| Crystal Systems: | monoclinic|triclinic |
| Oldest Known Age: | 2816 Million Years Ago |
| Mohs Hardness: | 6.0 |
| Diaphaneity: | 2.0 |
| Specific Gravity: | 2.59 |
| More Info: | Search Wikipedia: Orthoclase (Wiki) Search Mindat: Orthoclase Search Web Mineral DB: Orthoclase |