Rock Identifier

Category

Mineral, Often Found As A Rock

Browse mineral, often found as a rock specimens identified by the Rock Identifier community.

Learn about Mineral, Often Found As A Rock in the encyclopedia

Rock Salt

Rock Gypsum

Coral Rock

Asphalt Rock

Calc-Silicate Rock

Calc-Silicate Rock

Talc-carbonate Rock

Talc-carbonate Rock

Halite

Dolomite

Gypsum

Coal

Limestone

Glauconite

Chert (Flint) (Chert (SiO2)) — sedimentary

Chert (Flint)

Chert (SiO2)

Granite River Rock (Intrusive igneous rock (composed mainly of quartz, alkali feldspar, and plagioclase)) — igneous

Granite River Rock

Intrusive igneous rock (composed mainly of quartz, alkali feldspar, and plagioclase)

Coquina (Bioclastic Limestone (composed primarily of CaCO3)) — sedimentary

Coquina

Bioclastic Limestone (composed primarily of CaCO3)

Chert (specifically Red Chert or Jasper) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (specifically Red Chert or Jasper)

Microcrystalline Quartz (SiO2)

Banded Sedimentary Rock (Sedimentary rock with mineral veins/banding) — sedimentary

Banded Sedimentary Rock

Sedimentary rock with mineral veins/banding

Massive Quartz (Milky or Gray) (Silicon Dioxide (SiO2)) — mineral

Massive Quartz (Milky or Gray)

Silicon Dioxide (SiO2)

Gravel and Sand Aggregate (Unconsolidated Clastic Sediment) — sedimentary

Gravel and Sand Aggregate

Unconsolidated Clastic Sediment

Chert (often called Flint when dark) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (often called Flint when dark)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Serpentine (Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)3(Si, Al, Fe)2O5(OH)4) — metamorphic

Serpentine

Serpentinite (Mg, Fe, Ni, Al, Zn, Mn)3(Si, Al, Fe)2O5(OH)4

Chert (Flint) (Chert (SiO2)) — sedimentary

Chert (Flint)

Chert (SiO2)

Chert (Flint) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Flint)

Microcrystalline Quartz (SiO2)

Chert / Flint (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert / Flint

Cryptocrystalline Quartz (SiO2)

Rhodonite ((Mn,Fe,Mg,Ca)SiO3) — mineral

Rhodonite

(Mn,Fe,Mg,Ca)SiO3

Quartz (Druzy) (Silicon Dioxide (SiO2)) — mineral

Quartz (Druzy)

Silicon Dioxide (SiO2)

Milky Quartz Pebble with Iron Inclusions (Silicon Dioxide (SiO2)) — mineral

Milky Quartz Pebble with Iron Inclusions

Silicon Dioxide (SiO2)

Chert (Nodule) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Nodule)

Silicon Dioxide (SiO2)

Turquoise (Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]) — Mineral

Turquoise

Hydrated phosphate of copper and aluminium [CuAl6(PO4)4(OH)8·4H2O]

Druzy Quartz on Host Rock (Silicon Dioxide (SiO2) with various iron-oxide inclusions) — mineral

Druzy Quartz on Host Rock

Silicon Dioxide (SiO2) with various iron-oxide inclusions

Unakite (Granite (altered hydrothermal)) — igneous

Unakite

Granite (altered hydrothermal)

Tumbled yellow-orange jasper (Microcrystalline quartz (chalcedony), SiO₂, colored by iron oxides) — mineral

Tumbled yellow-orange jasper

Microcrystalline quartz (chalcedony), SiO₂, colored by iron oxides

Vuggy Quartz on Matrix (Crystalline Silicon Dioxide (SiO2)) — mineral

Vuggy Quartz on Matrix

Crystalline Silicon Dioxide (SiO2)

Granite (Intrusive Igneous Rock) — igneous

Granite

Intrusive Igneous Rock

Chert (Jasper/Flint variation) (Chert (SiO2)) — sedimentary

Chert (Jasper/Flint variation)

Chert (SiO2)

Nephrite Jade (Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)) — metamorphic

Nephrite Jade

Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)

Unakite (Tumbled) (Epidotized Granite) — metamorphic

Unakite (Tumbled)

Epidotized Granite

Druzy Quartz on Matrix (Silicon Dioxide (SiO2)) — mineral

Druzy Quartz on Matrix

Silicon Dioxide (SiO2)

Milky Quartz with Country Rock contact (Silicon Dioxide (SiO2) in contact with Metamorphic/Igneous rock) — mineral

Milky Quartz with Country Rock contact

Silicon Dioxide (SiO2) in contact with Metamorphic/Igneous rock

Satin Spar Selenite (Gypsum (Calcium Sulfate Dihydrate, CaSO4·2H2O)) — mineral

Satin Spar Selenite

Gypsum (Calcium Sulfate Dihydrate, CaSO4·2H2O)

Agate (Banded Chalcedony) (Cryptocrystalline Silica (SiO2)) — mineral

Agate (Banded Chalcedony)

Cryptocrystalline Silica (SiO2)

Fuchsite (Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)) — mineral

Fuchsite

Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)

Quartzite Pebble (Metamorphic Quartzite (SiO2)) — metamorphic

Quartzite Pebble

Metamorphic Quartzite (SiO2)

Chert (with nodule) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (with nodule)

Microcrystalline Quartz (SiO2)

Quartzite (River Pebble) (Metamorphic Quartzite (SiO2)) — metamorphic

Quartzite (River Pebble)

Metamorphic Quartzite (SiO2)

Sandstone (Weathered Fragment) (Clastic Sedimentary Rock) — sedimentary

Sandstone (Weathered Fragment)

Clastic Sedimentary Rock

Sandstone (Sedimentary Rock (Quartz Sandstone)) — sedimentary

Sandstone

Sedimentary Rock (Quartz Sandstone)

Agate (Silicon dioxide (Chalcedony), SiO2) — sedimentary

Agate

Silicon dioxide (Chalcedony), SiO2

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Lapis Lazuli (in Matrix) (Lazurite-bearing Metamorphic Rock (Na,Ca)8(AlSiO4)6(SO4,S,Cl)2) — metamorphic

Lapis Lazuli (in Matrix)

Lazurite-bearing Metamorphic Rock (Na,Ca)8(AlSiO4)6(SO4,S,Cl)2

Chert (Jasper/Chalcedony) (Microcrystalline Silica (SiO2)) — sedimentary

Chert (Jasper/Chalcedony)

Microcrystalline Silica (SiO2)

Chert (Jasper variation) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Jasper variation)

Silicon Dioxide (SiO2)

Sandstone with Iron Banding (Arenite with Hematite or Limonite staining (SiO2 with Fe2O3)) — sedimentary

Sandstone with Iron Banding

Arenite with Hematite or Limonite staining (SiO2 with Fe2O3)

Unakite (Unakite (altered granite containing Epidote, Orthoclase, and Quartz)) — metamorphic

Unakite

Unakite (altered granite containing Epidote, Orthoclase, and Quartz)