Rock Identifier

Category

Mineral And Metamorphic Rock

Browse mineral and metamorphic rock specimens identified by the Rock Identifier community.

Mica Schist (Mica Schist (KAl2(AlSi3O10)(OH)2 / K(Mg,Fe)3AlSi3O10(OH)2)) — metamorphic

Mica Schist

Mica Schist (KAl2(AlSi3O10)(OH)2 / K(Mg,Fe)3AlSi3O10(OH)2)

Hematite (Hematite (Fe2O3)) — Mineral

Hematite

Hematite (Fe2O3)

Quartz Vein in Host Rock (Gabbro or Basalt) (Silicon Dioxide (SiO2) with Mafic Silicates) — metamorphic/igneous

Quartz Vein in Host Rock (Gabbro or Basalt)

Silicon Dioxide (SiO2) with Mafic Silicates

metamorphic/igneous

Phyllite (Phyllite (Foliated metamorphic rock)) — metamorphic

Phyllite

Phyllite (Foliated metamorphic rock)

Quartzite (Metamorphic Rock (Mainly SiO2)) — metamorphic

Quartzite

Metamorphic Rock (Mainly SiO2)

Dendritic Agate (Chalcedony (SiO2) with manganese/iron oxide inclusions) — mineral

Dendritic Agate

Chalcedony (SiO2) with manganese/iron oxide inclusions

Mica Schist (Mica Schist (primarily Muscovite and Quartz)) — metamorphic

Mica Schist

Mica Schist (primarily Muscovite and Quartz)

Clear Quartz (Rock Crystal) (Quartz (Silicon Dioxide, SiO2)) — mineral

Clear Quartz (Rock Crystal)

Quartz (Silicon Dioxide, SiO2)

Clear Quartz (Rock Crystal) (Silicon Dioxide (SiO2)) — mineral

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Clear Quartz (Rock Crystal) (Silicon Dioxide (SiO2)) — mineral

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Arsenopyrite in Quartz/Host Rock (Arsenopyrite (FeAsS)) — mineral

Arsenopyrite in Quartz/Host Rock

Arsenopyrite (FeAsS)

Mica Schist (Mica Schist (Composition typically includes Muscovite KAl2(AlSi3O10)(OH)2 and Quartz SiO2)) — metamorphic

Mica Schist

Mica Schist (Composition typically includes Muscovite KAl2(AlSi3O10)(OH)2 and Quartz SiO2)

Quartzite (River Pebble) (Metamorphosed Quartz Sandstone (SiO2)) — metamorphic

Quartzite (River Pebble)

Metamorphosed Quartz Sandstone (SiO2)

Quartzite with inclusions (Metamorphosed Quartz-rich Rock (SiO2)) — metamorphic

Quartzite with inclusions

Metamorphosed Quartz-rich Rock (SiO2)

Epidote (Epidote (Ca2(Al2,Fe3+)AlSi3O12(OH))) — mineral

Epidote

Epidote (Ca2(Al2,Fe3+)AlSi3O12(OH))

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Beryl (likely Aquamarine) in matrix (Be3Al2(SiO3)6 (Beryllium Aluminum Silicate)) — mineral

Beryl (likely Aquamarine) in matrix

Be3Al2(SiO3)6 (Beryllium Aluminum Silicate)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Greenstone / Serpentinite (Serpentinite (composed largely of Serpentine group minerals, Mg3Si2O5(OH)4)) — metamorphic

Greenstone / Serpentinite

Serpentinite (composed largely of Serpentine group minerals, Mg3Si2O5(OH)4)

Yellow Quartz (Citrine/Yellow Jasper mix) (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz (Citrine/Yellow Jasper mix)

Silicon Dioxide (SiO2)

Quartzite Pebble (with Iron Inclusions) (Metamorphic Rock (Mainly SiO2)) — metamorphic

Quartzite Pebble (with Iron Inclusions)

Metamorphic Rock (Mainly SiO2)

Quartzite (Metamorphic Rock (Mainly SiO2)) — metamorphic

Quartzite

Metamorphic Rock (Mainly SiO2)

Pink Quartzite (Silica (SiO2) - Metamorphic rock) — metamorphic

Pink Quartzite

Silica (SiO2) - Metamorphic rock

Quartzite pebble (Metamorphic rock (mainly SiO2)) — metamorphic

Quartzite pebble

Metamorphic rock (mainly SiO2)

Quartzite (Metamorphic rock (primarily SiO2)) — metamorphic

Quartzite

Metamorphic rock (primarily SiO2)

Quartzite (River Cobble) (Metamorphic Quartz-rich Rock) — metamorphic

Quartzite (River Cobble)

Metamorphic Quartz-rich Rock

Gneiss (with Quartz and Biotite Mica) (Gneiss) — metamorphic

Gneiss (with Quartz and Biotite Mica)

Gneiss

Quartz (likely Milky Quartz) (Quartz (SiO₂ - Silicon Dioxide)) — Mineral

Quartz (likely Milky Quartz)

Quartz (SiO₂ - Silicon Dioxide)

Tiger's Eye (Pseudomorph of Quartz after Crocidolite (SiO2)) — metamorphic

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Quartz (likely tumbled or naturally water-worn) (Quartz (SiO₂ - Silicon Dioxide)) — Mineral

Quartz (likely tumbled or naturally water-worn)

Quartz (SiO₂ - Silicon Dioxide)

Green Aventurine (Silicon Dioxide (Quartz variety) with Fuchsite inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)) — metamorphic

Green Aventurine

Silicon Dioxide (Quartz variety) with Fuchsite inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Red Jasper (Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions) — sedimentary

Red Jasper

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions

Unakite (Epidotized Granite) — metamorphic

Unakite

Epidotized Granite

Diamond (in a metal ring setting) (Diamond (Pure Carbon, C)) — mineral

Diamond (in a metal ring setting)

Diamond (Pure Carbon, C)

Blue Apatite (Apatite (Calcium Phosphate) - Ca5(PO4)3(F,Cl,OH)) — mineral

Blue Apatite

Apatite (Calcium Phosphate) - Ca5(PO4)3(F,Cl,OH)

Slate (Slate (foliated metamorphic rock rich in quartz, sericite, and chlorite)) — metamorphic

Slate

Slate (foliated metamorphic rock rich in quartz, sericite, and chlorite)

Quartzite Pebble (with Iron Inclusions) (Quartzite (primarily SiO2 with Fe2O3/FeOOH impurities)) — metamorphic

Quartzite Pebble (with Iron Inclusions)

Quartzite (primarily SiO2 with Fe2O3/FeOOH impurities)

Biotite Mica (Biotite, K(Mg,Fe)3AlSi3O10(F,OH)2) — mineral

Biotite Mica

Biotite, K(Mg,Fe)3AlSi3O10(F,OH)2

Quartzite (Metamorphosed Quartz Sandstone (SiO2)) — metamorphic

Quartzite

Metamorphosed Quartz Sandstone (SiO2)

Aventurine (likely Green Aventurine) (Silicon Dioxide (SiO2) with mineral inclusions) — Mineral/Mineraloid within a rock matrix

Aventurine (likely Green Aventurine)

Silicon Dioxide (SiO2) with mineral inclusions

Mineral/Mineraloid within a rock matrix