| Name: | Opal Opl |
| Specimens in Collection: |  #179: Opal Barstow, California, USA  #414: Opal var. Hyalite Moon Beam Claim, Saguacho County, Colorado, USA  #160: Opal var. Hyalite Mexico  #495: Opal South Wollo Zone, Amhara Region, Ethiopia  #181: Opalized Wood Java, Indonesia  #180: Opal Welo, Ethiopia  #486: Opal var. Hyalite El Teptate Municipality, San Luis Potosi, Mexico  #575: Opal South Wollo Zone, Amhara Region, Ethiopia  #800: Opal var. Honduran Basalt Honduras  #885: Chalcedony / Opal var. Tiffany Stone Utah, USA  #959: Opal var. Green St. John, U.S. Virgin Islands  #1275: Opal Opal Butte, Oregon |
| IMA Chemistry: | SiO2·nH2O |
| Chemistry Elements: | The mineral Opal contains elements: Silicon (Si) Oxygen (O) Hydrogen (H) |
| Country of Type Locality: | unknown |
| Year First Published: | 0 |
| IMA Status: | Approved,Grandfathered |
| Status Notes: | Mineral name has been known since antiquity and predates any formal descriptive publication. |
| Structural Group Name: | Amorphous |
| Fleischer's Group Name: | |
| Crystal Systems: | hexagonal|tetragonal, amorphous |
| Oldest Known Age: | 4000 Million Years Ago |
| More Info: | Search Wikipedia: Opal (Wiki) Search Mindat: Opal Search Web Mineral DB: Opal |