Sunstone
Plagioclase Feldspar (Na,Ca)(Al,Si)4O8
mineral
Category
Mineral (Extraterrestrial)
Browse mineral (extraterrestrial) specimens identified by the Rock Identifier community.
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Hawk's Eye (Blue Tiger's Eye)
Quartz (fibrous crocidolite variety)
Mineral
Amazonite
K(AlSi3O8) - Lead-bearing Microcline (Potassium Feldspar)
Mineral
Blue Lace Agate
Silicon Dioxide (SiO2)
mineral
Amazonite
Tectosilicate Microcline (KAlSi3O8)
mineral
Gold flakes
Native Gold (Au)
mineral
Amethyst
Amethyst (Silicon Dioxide SiO2 + Fe4+)
mineral
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Native Copper within Host Rock
Native Copper (Cu)
Mineral
Raw Emerald in Schist Matrix
Beryl (Be3Al2Si6O18) in Mica Schist
Mineral in Metamorphic Rock
Peach Moonstone
Orthoclase Feldspar (KAlSi3O8)
mineral
Amethyst
Silicon Dioxide (SiO2) with traces of Iron (Fe3+)
mineral
Snowflake Obsidian
Spherulitic Obsidian (primarily SiO2 with Cristobalite inclusions)
igneous
Pyrite in Matrix (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Opal
Hydrated Amorphous Silica (SiO2·nH2O)
Mineral
Goethite / Limonite Gossan
Goethite, FeO(OH)
mineral
Quartz Geode (Druzy)
Crystalline Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Amethyst
Silicon dioxide with iron impurities (SiO2)
mineral
Amethyst
SiO2 (Silicon Dioxide with iron impurities)
mineral
Septarian Nodule Geode
Septarian concretions (composed of Calcite, Aragonite, and Limestone)
sedimentary
Gold-bearing Quartz
Auriferous Quartz (SiO2 with native Au)
mineral
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Tiger's Eye (Rough)
Pseudomorph of Quartz after Crocidolite (SiO2 with FeOOH inclusions)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Chalcedony (Botryoidal/Chalcedony Rose)
Silicon Dioxide (SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Chalcedony (Agate/Carnelian)
Cryptocrystalline Quartz (SiO2)
mineral
Orange Calcite with Siderite/Iron Oxide Coating
Calcium Carbonate (CaCO3)
mineral
Quartz (Smoky or Citrine variety)
Silicon Dioxide (SiO2)
mineral
Ruby in Zoisite (Anyolite)
Anyolite (Combination of Corundum and Zoisite)
metamorphic
Quartz (Citrine or Smoky variety)
Silicon Dioxide (SiO2)
mineral
Moonstone
Adularia (orthoclase) or Albite (plagioclase), a potassium aluminum silicate of the feldspar group
Mineral
Amethyst
Silicon Dioxide with Iron impurities (SiO2)
mineral
Amethyst
Silicon Dioxide (SiO2) with iron impurities
mineral
Smoky Quartz
Smoky Quartz (Silicon Dioxide - SiO2)
mineral
Herkimer Diamond
Quartz (Silicon Dioxide) - SiO2
mineral
Amethyst (Tumbled)
Quartz (Silicon Dioxide, SiO2) with iron impurities
mineral
Herkimer Diamond
Quartz (Silicon Dioxide) - SiO2
mineral
Unakite
Unakite (Epidotized Granite)
metamorphic
Himalayan Pink Salt
Halite (NaCl)
sedimentary
Granite River Rock
Phaneritic Felsic Igneous Rock (Granite)
igneous