| Name: | Prehnite Prh |
| Specimens in Collection: |  #67: Prehnite China  #381: Prehnite Lower New St. Quarry, Patterson, New Jersey, USA  #624: Prehnite O+G Quarry, Woodbury, Connecticut, USA  #707: Prehnite Daikon Commune, Kayer Region, Mali  #708: Prehnite Ol' Faithful Pocket, Lower New St. Quarry, Patterson, New Jersey, USA  #709: Prehnite Ol' Faithful Pocket, Lower New St. Quarry, Patterson, New Jersey, USA  #723: Prehnite Goboboseb Mtns., Brandberg Area, Erongo, Namibia  #1139: Prehnite / Epidote (Tumbled) |
| IMA Chemistry: | Ca2Al(Si3Al)O10(OH)2 |
| Chemistry Elements: | The mineral Prehnite contains elements: Calcium (Ca) Aluminum (Al) Silicon (Si) Oxygen (O) Hydrogen (H) |
| Country of Type Locality: | South Africa |
| Year First Published: | 1789 |
| IMA Status: | Approved,Grandfathered |
| Status Notes: | Klaproth M H (1788) Chemische Zergliederung der Prehnits. Schriften der Gesellschaft naturforschender Freunde zu Berlin 8, 211-223 |
| Structural Group Name: | Prehnite |
| Fleischer's Group Name: | |
| Crystal Systems: | orthorhombic |
| Oldest Known Age: | 2900 Million Years Ago |
| Mohs Hardness: | 6.25 |
| Diaphaneity: | 2.0 |
| Specific Gravity: | 2.875 |
| More Info: | Search Wikipedia: Prehnite (Wiki) Search Mindat: Prehnite Search Web Mineral DB: Prehnite |