Rock Identifier

Category

Mineralogical Specimen

Browse mineralogical specimen specimens identified by the Rock Identifier community.

Learn about Mineralogical Specimen in the encyclopedia

Emerald in Matrix

Emerald in Matrix

Morganite Crystal

Morganite Crystal

Aquamarine Matrix

Aquamarine Matrix

Emerald Crystal

Emerald Crystal

Mushroom Tourmaline

Mushroom Tourmaline

Aquamarine Crystal

Aquamarine Crystal

White Beryl

White Beryl

Smoky Quartz

Smoky Quartz

Clear Obsidian

Clear Obsidian

Goshenite Crystal

Goshenite Crystal

Magnetite

Magnetite

Crocoite

Crocoite

Chert (Jasper/Carnelian variety) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper/Carnelian variety)

Microcrystalline Quartz (SiO2)

Chert (Iron-stained) (Chert (SiO2)) — sedimentary

Chert (Iron-stained)

Chert (SiO2)

Sandstone (Arenite (Sedimentary rock composed of sand-sized grains)) — sedimentary

Sandstone

Arenite (Sedimentary rock composed of sand-sized grains)

Obsidian (Extrusive igneous volcanic glass (rich in SiO2)) — igneous

Obsidian

Extrusive igneous volcanic glass (rich in SiO2)

Silver (Native Element) (Silver (Ag) in an alloy of 90% Silver and 10% Copper) — mineral

Silver (Native Element)

Silver (Ag) in an alloy of 90% Silver and 10% Copper

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

Limestone (River Pebble) (Sedimentary Calcium Carbonate (CaCO3)) — sedimentary

Limestone (River Pebble)

Sedimentary Calcium Carbonate (CaCO3)

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

Quartzite Pebble

Metamorphosed Quartz Sandstone (SiO2)

River Pebble (likely Quartzite or Quartz) (Quartzite (SiO2)) — metamorphic

River Pebble (likely Quartzite or Quartz)

Quartzite (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — Mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Quartzite in Conglomerate (Clastic Sedimentary Rock with Silicon Dioxide (SiO2) inclusions) — sedimentary

Quartzite in Conglomerate

Clastic Sedimentary Rock with Silicon Dioxide (SiO2) inclusions

Quartzite Pebble (Quartzite (SiO2)) — metamorphic

Quartzite Pebble

Quartzite (SiO2)

Sandstone (River Cobble) (Arenite) — sedimentary

Sandstone (River Cobble)

Arenite

Milky Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Milky Quartz Pebble

Silicon Dioxide (SiO2)

Basalt River Pebble (Basalt (Mafic volcanic rock)) — igneous

Basalt River Pebble

Basalt (Mafic volcanic rock)

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

Quartzite (River Pebble)

Quartzite (primarily SiO2)

Quartzite Pebble (Quartzite (SiO2)) — metamorphic

Quartzite Pebble

Quartzite (SiO2)

Riverstone Quartzite (Quartzite (primarily SiO2)) — metamorphic

Riverstone Quartzite

Quartzite (primarily SiO2)

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

Quartzite with inclusions

Metamorphosed Quartz-rich Rock (SiO2)

Quartz (Grain/Pebble) (Silicon Dioxide (SiO2)) — mineral

Quartz (Grain/Pebble)

Silicon Dioxide (SiO2)

Quartz (Yellow/Milky variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Yellow/Milky variety)

Silicon Dioxide (SiO2)

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

Chert (Flint)

Chert (Microcrystalline Quartz, SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Basalt (Basalt (composition of plagioclase feldspar, pyroxene, and olivine)) — igneous

Basalt

Basalt (composition of plagioclase feldspar, pyroxene, and olivine)

Quartz Pebble (Quartz (Silicon Dioxide, SiO2)) — mineral

Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Quartzite Cobble (Quartzite (SiO2)) — metamorphic

Quartzite Cobble

Quartzite (SiO2)

River Pebble (Gabbro or Dark Sandstone variety) (Mafic Intrusive Rock (Plagioclase Feldspar and Pyroxene)) — igneous

River Pebble (Gabbro or Dark Sandstone variety)

Mafic Intrusive Rock (Plagioclase Feldspar and Pyroxene)

Chert (and/or Chalcedony) (Silicon dioxide (SiO2)) — sedimentary

Chert (and/or Chalcedony)

Silicon dioxide (SiO2)

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

Quartzite (River Pebble)

Quartzite (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

Granite Cobble (Granitoid (composed mainly of Quartz, Feldspar, and Mica)) — igneous

Granite Cobble

Granitoid (composed mainly of Quartz, Feldspar, and Mica)

Chert (Tan/Yellow variety) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Tan/Yellow variety)

Microcrystalline Quartz (SiO2)

Granite (Phaneritic plutonic rock (SiO2 > 69%)) — igneous

Granite

Phaneritic plutonic rock (SiO2 > 69%)

Milky Quartz (Water-Worn Pebble) (Silicon Dioxide (SiO2)) — mineral

Milky Quartz (Water-Worn Pebble)

Silicon Dioxide (SiO2)

Sandstone (Arenite (SiO2 principal component)) — sedimentary

Sandstone

Arenite (SiO2 principal component)

Granite Pebble (Granite (High-silica plutonic rock)) — igneous

Granite Pebble

Granite (High-silica plutonic rock)

River Cobble (likely Basalt or Chert) (Basalt (Mafic volcanic rock)) — igneous

River Cobble (likely Basalt or Chert)

Basalt (Mafic volcanic rock)

Basalt Pebble (Basalt (Mafic Volcanic Rock)) — igneous

Basalt Pebble

Basalt (Mafic Volcanic Rock)

Basalt Pebble (Basalt (Extrusive Mafic Igneous)) — igneous

Basalt Pebble

Basalt (Extrusive Mafic Igneous)

Quartz (River Pebble) (Silicon Dioxide (SiO2)) — mineral

Quartz (River Pebble)

Silicon Dioxide (SiO2)

Sandstone (Ferruginous) (Clastic Sedimentary Rock (Litharenite)) — sedimentary

Sandstone (Ferruginous)

Clastic Sedimentary Rock (Litharenite)