Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2)
metamorphic
Category
Mineral (Processed Metal)
Browse mineral (processed metal) specimens identified by the Rock Identifier community.
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Quartz Boulder
Silicon Dioxide (SiO2)
mineral
Green Calcite
Calcium Carbonate (CaCO3)
mineral
Snowflake Obsidian
Spherulitic Obsidian (Volcanic Glass with Cristobalite inclusions)
igneous
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Quartz (specifically Citrine or Iron-stained Quartz)
Silicon Dioxide (SiO2)
mineral
Snowflake Obsidian
Hydrated Volcanic Glass with Cristobalite inclusions
igneous
Quartz (River Pebble)
Silicon Dioxide (SiO2)
mineral
White Moonstone (Feldspar)
Potassium aluminum silicate (KAlSi3O8)
mineral
Ocean Jasper
Orbicular Jasper (Silicon Dioxide, SiO2)
mineral
Granite
Felsic intrusive igneous rock
igneous
Blue Goldstone
Aventurine Glass
Man-made mineral simulant (Glass)
Mica Schist with Quartz
Mica-Quartz Schist (Muscovite subclass)
metamorphic
Pink Tumbled Agate
Silicon Dioxide (SiO2) with dye
mineral
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Bauxite
Al2O3·2H2O (principally composed of gibbsite, boehmite, and diaspore)
sedimentary
Citrine Quartz
Silicon Dioxide (SiO2)
mineral
Greenstone or Epidote-rich Metamorphic Rock
Chlorite/Epidote Schist or Greenstone
metamorphic
Petrified Wood
Silicified Wood (SiO2)
fossil
Chevron Amethyst
Silicon Dioxide (SiO2) with iron impurities and white quartz bands
mineral
Aquamarine
Beryl (Be3Al2Si6O18)
mineral
Druzy Quartz on Limestone
Silicon Dioxide (SiO2)
mineral
Ferruginous Quartz
Quartz (Silicon Dioxide) with Iron Inclusion, SiO2
mineral
Turquoise
CuAl6(PO4)4(OH)8·4H2O
gemstone
Petrified Wood
Silicified Wood (SiO2)
fossil
Sandstone (Quartzite-leaning)
Arenite (primarily SiO2)
sedimentary
Shale or Mudstone
Argillaceous sedimentary rock
sedimentary
Sandstone Concretion
Clastic sedimentary rock (primarily Quartz SiO2)
sedimentary
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with inclusions of Iron Oxide)
Metamorphic
Schist
Mica Schist (primarily composed of quartz, feldspar, and mica)
metamorphic
Red Jasper
Jasper (Silicon Dioxide based crypto-crystalline Quartz with Iron inclusions)
sedimentary
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) within Metasedimentary or Igneous Matrix
metamorphic
Acicular Azurite (indicated by deep blue, fibrous/fuzzy appearance)
Azurite (Copper Carbonate Hydroxide) - Cu3(CO3)2(OH)2
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Orange Calcite (Polished Sphere)
Calcium Carbonate (CaCO3)
mineral
Quartz-Tourmaline Pebble
Quartz with Tourmaline inclusions
igneous
Hematite
Hematite (Fe2O3)
Mineral
Sandstone (Ferruginous)
Arenite with Iron Oxide cement
sedimentary
Magnetite Nodule
Magnetite (Fe3O4)
mineral
Megalodon Shark Tooth
Otodus megalodon
fossil
Mahogany Obsidian
Volcanic Glass with Hematite inclusions (SiO2)
igneous
Iron Ore / Hematite Rock
Iron oxide (primarily Hematite, Fe2O3)
mineral