Pyrite in Matrix
Iron Sulfide (FeS2)
mineral
Category
Mineral And Metamorphic Rock
Browse mineral and metamorphic rock specimens identified by the Rock Identifier community.
Learn about Mineral And Metamorphic Rock in the encyclopedia
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Rose Quartz
Silicon Dioxide (SiO2)
mineral
Granitic Pegmatite
Pegmatite (composed primarily of Quartz, Feldspar, and Muscovite mica)
igneous
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Unakite
Unakite (Epidotized Granite)
metamorphic
Limonite
FeO(OH)•nH2O
mineral
Quartzite
Metamorphosed Quartz Sandstone (SiO2)
metamorphic
Red Sandstone
Clastic Sandstone (typically Quartz-rich with Iron Oxide)
sedimentary
Banded Serpentinite (Beach Pebble)
Serpentine-group silicate rock ((Mg,Fe,Ni,Al,Zn,Mn)3(Si,Fe,Al)2O5(OH)4)
metamorphic
Quartzite
Quartzite (SiO2)
metamorphic
Granite / Pegmatite Pebble
Felsic intrusive igneous rock
igneous
Mica Schist
Mica Schist (KAl2(AlSi3O10)(OH)2 / K(Mg,Fe)3AlSi3O10(OH)2)
metamorphic
Quartzite Pebble
Metamorphic Quartzite (SiO2)
metamorphic
Weathered serpentinite (likely serpentine-rich rock)
Serpentinite; chiefly serpentine-group minerals, Mg₃Si₂O₅(OH)₄, with possible magnetite and accessory minerals
metamorphic
Serpentinite
Serpentinite (composed primarily of Serpentine group minerals such as Antigorite, Lizardite, and Chrysotile)
metamorphic
Tumbled milky quartz
Quartz (silicon dioxide, SiO₂)
mineral
Unakite
Epidotized Granite
metamorphic
Serpentinite
Serpentinite (composed primarily of serpentine group minerals like lizardite, chrysotile, or antigorite; Mg3Si2O5(OH)4)
metamorphic
Serpentinite (Serpentine Rock)
Serpentinite is a rock composed of one or more serpentine group minerals, chiefly antigorite, chrysotile, and lizardite, with the general formula (Mg,Fe)3Si2O5(OH)4. Often includes other minerals like magnetite, talc, and chromite.
Metamorphic Rock
Petrified Wood
Silicified Wood (SiO2)
metamorphic
Blue Dumortierite Quartz
Dumortierite Inclusions in Quartz (SiO2 with Al7(BO3)(SiO4)3O3)
mineral
Honey calcite (calcite-rich limestone/marble fragment)
Calcite — CaCO₃; likely coarse crystalline calcitic rock
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Gray slate
Slate; fine-grained foliated metamorphic rock composed mainly of mica and quartz
metamorphic
Milky quartz
Quartz (silicon dioxide, SiO₂)
mineral
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Turquoise
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
mineral
Sulfur (on Matrix)
Native Sulfur (S8)
mineral
Serpentinite
Serpentinite (composed largely of Serpentine minerals such as Lizardite, Antigorite, and Chrysotile: Mg3Si2O5(OH)4)
metamorphic
River Rock / Stream Pebble
Fluvial Clast / Rounded Sedimentary Particle
Sedimentary Rock (possibly composed of various minerals)
Quartzite Pebble (or Quartz Pebble)
Quartzite (SiO2)
metamorphic
Lepidolite
K(Li,Al)3(Si,Al)4O10(F,OH)2
mineral
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
mineral
Gypsum (Alabaster variety)
Calcium sulfate dihydrate (CaSO4·2H2O)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Serpentinized ultramafic rock (serpentinite)
Serpentinite; chiefly serpentine-group minerals, Mg₃Si₂O₅(OH)₄, with possible magnetite, chromite, talc, and carbonate
metamorphic
Magnetite
Iron(II,III) oxide (Fe3O4)
mineral
Bornite (Peacock Ore)
Bornite (Cu5FeS4)
mineral
Green Aventurine
Silicon Dioxide (Quartz) with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)
metamorphic
Quartzite River Rock
Quartzite (primarily SiO2)
metamorphic
Lapis Lazuli
Sodalite-rich metamorphic rock containing Lazurite (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2
metamorphic