Sandstone
Arenite (SiO2 primarily)
sedimentary
Category
Mineral Side Rock
Browse mineral side rock specimens identified by the Rock Identifier community.
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Marble
Recrystallized Calcite (CaCO3)
metamorphic
Banded Agate
Agate (Silicon Dioxide - SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Turquoise
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
mineral
Granodiorite
Granodiorite (containing Plagioclase, Quartz, and Biotite)
igneous
Turquoise or Chrysocolla (Inlaid Jewelry)
Hydrated copper aluminum phosphate / Hydrated copper phyllosilicate
mineral
Schist
Mica Schist (Metamorphic Rock)
metamorphic
Granite
Phaneritic Plutonic Felsic Rock
igneous
Sandstone (Quartzose Sandstone)
Clastic Sedimentary Rock (primarily SiO2)
sedimentary
Schist (Micaceous Schist)
Schist (comprising Muscovite/Biotite mica, Quartz, and Feldspar)
metamorphic
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Granite
Granite (a common rock type, not a single mineral with a formula. Composed primarily of quartz, feldspar, and mica/amphibole).
igneous
Quartz vein in Host Rock
Crystalline Silicon Dioxide (SiO2) in Lithic Matrix
metamorphic
Marble
Recrystallized Carbonate Rock (CaCO3)
metamorphic
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Gneiss
Gneiss
metamorphic
Quartz Vein on Matrix
Silicon Dioxide (SiO2)
mineral
Emerald in Matrix
Beryl (Be3Al2Si6O18)
mineral
Geode (Chert or Quartz Nodule)
Silicon Dioxide (SiO2)
sedimentary
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Sandstone (specifically an Iron-Concretion)
Arenite with Iron Oxide (Limonite/Goethite) cementation
sedimentary
Green Slag Glass
Cullet (Amorphous Silicon Dioxide with impurities)
Man-made rock-like material
Turquoise
Turquoise, CuAl6(PO4)4(OH)8·4H2O
mineral
Granodiorite
Granodiorite
igneous
Quartz with Iron Staining
Silicon Dioxide (SiO2) with Limonite/Hematite inclusions
mineral
Diorite
Diorite (Intermediate plutonic rock)
igneous
Gold in Quartz Matrix
Native Gold (Au) in Quartz (SiO2)
mineral
Granite
Granite (composed primarily of Quartz SiO2, Alkali Feldspar KAlSi3O8, and Plagioclase)
igneous
Obsidian
Volcanic glass (SiO2-rich extrusive igneous rock)
igneous
Quartz with Hematite Staining
Silicon Dioxide (SiO2) with Ferric Oxide (Fe2O3) inclusions
mineral
Tree Agate
Dendritic Chalcedony (SiO2)
sedimentary
Quartzite pebble
Quartzite (composed primarily of Quartz, SiO2)
metamorphic
Quartz (Variety of Rough Mineral Specimens)
Silicon Dioxide (SiO2)
mineral
Quartz Druzy on Matrix (with Copper Mineralization)
Silicon Dioxide (SiO2) with Chrysocolla (Cu2-xAlx(H2-xSi2O5)(OH)4·n H2O)
mineral
Breccia
Breccia - Clastic sedimentary rock
sedimentary
Amygdaloidal Basalt with Quartz Infill
Basalt (SiO2 for the quartz inclusion)
igneous
Amygdaloidal Basalt
Amygdaloidal Basalt (Mafic Extrusive)
igneous
Rough Corundum (likely Sapphire/Zircon-bearing)
Aluminium Oxide (Al2O3)
mineral
Siltstone with Quartz Vein
Siltstone (primarily SiO2, Al2O3, Fe2O3)
sedimentary
Mica Schist
Mica Schist (predominantly Muscovite or Biotite sheet silicates)
metamorphic
Tiger's Eye
Silicon Dioxide with Crocidolite (SiO2)
mineral