Pink Granite
Phaneritic Felsic Igneous Rock (composed primarily of Quartz and Potassium Feldspar)
igneous
Category
Metamorphic Rock (Primarily Composed Of Minerals)
Browse metamorphic rock (primarily composed of minerals) specimens identified by the Rock Identifier community.
Learn about Metamorphic Rock (Primarily Composed Of Minerals) in the encyclopedia
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Desert Rose (Baryte or Selenite variant)
Barium Sulfate (BaSO4) or Gypsum (CaSO4·2H2O) with Sand inclusions
mineral
Green Aventurine
Aventurine Quartz (SiO2 + Fuchsite mica)
metamorphic
Quartz (Milk Quartz / Massive Quartz)
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (SiO2 based with various mineral cements)
sedimentary
Tiger's Eye (Rough)
Pseudomorph of Quartz after Crocidolite (SiO2)
mineral
Granite
Phaneritic Plutonic Igneous Rock (composed of Quartz, Feldspar, and Mica)
igneous
Chalk
Calcareous Ooze (composed primarily of coccoliths)
Sedimentary Rock
Marble
Recrystallized Calcite (CaCO3) Rock
metamorphic
Quartz Vein
Silicon Dioxide (SiO2)
Mineral
Banded Gneiss (River Rock/Pebble)
Gneiss (specifically a banded variety often found as a river rock)
Metamorphic Rock
Greenschist
Greenschist (Chlorite Schist)
metamorphic
Gneiss
High-grade metamorphic rock (Gneiss)
metamorphic
Brick
Fired clay or Ceramic material (no specific mineralogical scientific name as it's a composite)
Man-made material (constructed)
Mixed Tumbled Gemstones and River Rocks
Mixed Decorative Stones (predominantly Silicon Dioxide - SiO2 variants)
Mixed (Igneous, Sedimentary, Metamorphic, and Minerals)
Sandstone (Quartzose Sandstone)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Serpentinite
Serpentinite (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4
metamorphic
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxide inclusions)
metamorphic
Aventurine
Quartz (Aventurine variety)
Mineral
Epidote
Calcium aluminum iron silicate hydroxide (Ca2(Al,Fe)3(SiO4)3(OH))
metamorphic
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Serpentine
Serpentinite (group of minerals based on (Mg,Fe,Ni,Al,Zn,Mn)2-3(Si,Al,Fe)2O5(OH)4)
metamorphic
Specular Hematite with Pyrite
Iron Oxide (Fe2O3) with Iron Sulfide (FeS2)
mineral
Black Sand (Magnetite Sand)
Magnetite-rich Placers (Fe3O4)
sedimentary
Garnet
Almandine formula: Fe3Al2(SiO4)3
mineral
Quartz with Iron Staining
Silicon Dioxide (SiO2) with Limonite/Hematite inclusions
mineral
Iron Meteorite (Individual)
Siderite (composed of Kamacite and Taenite minerals)
igneous
Ruby in Fuchsite
Corundum (Al2O3) in Fuchsite (K(Al,Cr)3Si3O10(OH)2)
Mineral
Schist
Mica Schist (Metamorphic Rock)
metamorphic
Quartz Vein in Sedimentary Matrix
Silicon Dioxide (SiO2) with host rock
mineral
Sandstone
Arenite
sedimentary
Granite
Granite (a plutonic igneous rock)
Igneous
Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2)
mineral
Greenstone / Graywacke
Metagraywacke or Chlorite Schist
metamorphic
Plume Agate or Moss Agate
Agate (SiO2)
mineral
Sandstone
Arenite (general term for sandstone)
Sedimentary Rock
Green Aventurine
Silicon Dioxide (Quartz with Fuchsite inclusions) - SiO2
mineral
Granodiorite or Diorite
Granodiorite / Diorite
igneous
Banded Agate
Chalcedony / Silicon Dioxide (SiO2)
mineral
Greisen (Quartz-Muscovite-Turretine Rock)
Greisen
Metamorphic Rock
Nephrite Jade
Ca2(Mg,Fe)5Si8O22(OH)2 (Tremolite-Actinolite series)
metamorphic