Granite
Phaneritic Felsic Igneous Rock
igneous
Category
Crystal
Browse crystal specimens identified by the Rock Identifier community.
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Optical Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Green Aventurine and Clear Quartz
Green Aventurine (Silicon Dioxide - SiO2 with Fuchsite inclusions); Clear Quartz (Silicon Dioxide - SiO2)
Mineral
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Olivine in Basalt matrix
Olivine (Magnesium Iron Silicate - (Mg, Fe)2SiO4)
igneous
Magnetite (Iron Ore)
Magnetite (Fe3O4)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Yellow Diamond
Diamond (Carbon, C)
mineral
Aragonite Star Cluster
Aragonite (Calcium Carbonate, CaCO3)
mineral
Strawberry Quartz (or Hematoid Quartz)
Silicon Dioxide (SiO2) with inclusions of Hematite or Goethite
mineral
Dendritic Siltstone (or Mudstone)
Siltstone with Manganese Oxide dendrites
sedimentary
Chalcedony (Agate/Blue Quartzite)
Silicon Dioxide (SiO2)
mineral
Granite (specifically Brown Granite Countertop)
Phaneritic Felsic Igneous Rock (Granite-Gabbro series)
igneous
Feldspar (specifically Orthoclase)
Potassium Aluminum Silicate (KAlSi3O8)
mineral
Fluorite
Fluoride (Calcium Fluoride - CaF2)
mineral
Hematite (Iron Ore)
Hematite (alpha-Fe2O3)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Staurolite (Fairy Stone)
Staurolite (Fe2+2Al9Si4O23(OH))
metamorphic
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Milky Quartz (Tumbled/Water-worn)
Silicon Dioxide (SiO2)
mineral
Citrine (Yellow Quartz)
Silicon Dioxide (SiO2)
Mineral
Blue Apatite
Apatite (Ca5(PO4)3(F,Cl,OH))
mineral
White Onyx (Marble Onyx)
Calcite (CaCO3) - Banded Calcium Carbonate
sedimentary
Blue Sapphire
Corundum (Al2O3)
mineral
Sunstone
Oligoclase (Plagioclase Feldspar) - (Na,Ca)(Si,Al)4O8 with Hematite or Copper inclusions
mineral
Obsidian
Volcanic Glass (Primary composition: SiO2 - Silicon Dioxide)
Igneous
Quartz Geode
Silicon Dioxide (SiO2) in a Secondary Sedimentary/Volcanic cavity
mineral
Quartz Geode (partially formed)
Silicon Dioxide (SiO2)
mineral
Obsidian
Volcanic Glass (70-75% SiO2)
igneous
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz / Quartz Cluster
Silicon Dioxide (SiO2)
mineral
Pink Granite
Phaneritic Plutonic Rock (Granite with K-Feldspar)
igneous
Granite
Phaneritic Felsic Igneous Rock
igneous
Amethyst
Silicon dioxide (SiO2) with iron impurities
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Nephrite Jade
Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)
metamorphic