Orange Sapphire
Corundum (Al2O3 with trace elements)
gemstone
Category
Mineral Like Biological Tissue
Browse mineral like biological tissue specimens identified by the Rock Identifier community.
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Pink Dyed Agate
Chalcedony (SiO2) with artificial dyes
mineral
Prehnite with Epidote inclusions
Prehnite - Ca2Al(AlSi3O10)(OH)2; Epidote - Ca2(Al2,Fe)(Si2O7)(SiO4)O(OH)
mineral
Orthoclase Feldspar
Potassium Feldspar (KAlSi3O8)
mineral
Sandstone
Arenite (SiO2 primarily)
sedimentary
Blue Quartz (Aventurine)
Silicon Dioxide (SiO2) with inclusions of Dumortierite or Magnesio-riebeckite
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Quartz with Iron Oxide Inclusions
Silicon Dioxide (SiO2)
mineral
Strawberry Quartz
Quartz with Hematite or Goethite inclusions (SiO2 + inclusions)
mineral
Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
mineral
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
mineral
Gneiss
Gneiss
metamorphic
Basalt
Basalt
igneous
Gneiss (Granite Gneiss)
Gneiss
metamorphic
Gneiss
Gneiss
metamorphic
Sandstone
Arenite (SiO2 primarily)
sedimentary
Agate (Moss or Dendritic Agate)
Chalcedony (Silicon Dioxide, SiO2)
mineral
Pyrite in Matrix with Copper Alterations
Iron Sulfide (FeS2) with secondary Copper carbonates/sulfides
mineral
Greenschist
Greenschist (Chlorite-actinolite schist)
metamorphic
Granite
Felsic intrusive igneous rock
igneous
Granite
Intrusive igneous rock
igneous
Granite
Phaneritic plutonic rock (Quartz, Feldspar, Mica)
igneous
Granite
Granite (Felsic Intrusive Igneous Rock)
igneous
Granodiorite (River Cobble)
Granodiorite (contains Quartz, Plagioclase Feldspar, Biotite Mica)
igneous
Diorite
Phaneritic Intermediate Plutonic Rock
igneous
Granite Pegmatite
Phaneritic Felsic Igneous Rock (Granite)
igneous
Black Kyanite
Aluminum Silicate (Al2SiO5)
mineral
Blue Quartzite (Blue Aventurine / Dumortierite Quartz)
Quartzite with inclusions (SiO2 with AlAl4BSi3O18)
metamorphic
Granite
Granite (Plutonic Igneous Rock)
igneous
Granodiorite Pebble
Granodiorite
igneous
Gneiss
Gneiss (Foliated Metamorphic Rock)
metamorphic
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
mineral
Gneiss
Gneiss (a rock type, not a specific mineral with a formula)
Metamorphic Rock
Vanadinite
Vanadinite (Pb5(VO4)3Cl)
mineral
Sandstone
Arenite
sedimentary
Granite
Granite (Felsic Intrusive Igneous Rock)
igneous
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals, e.g., Lizardite, Chrysotile, Antigorite)
metamorphic
Copper Ore (likely Malachite or Chrysocolla staining)
Copper Secondary Mineral (e.g., Cu2CO3(OH)2)
mineral
Obsidian
Volcanic glass
igneous
Gneiss
Gneiss
metamorphic
Bornite
Bornite (Cu5FeS4)
mineral
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
mineral