Rock Identifier

Category

Mineral Like Biological Tissue

Browse mineral like biological tissue specimens identified by the Rock Identifier community.

Chert (with Quartz vein/coating) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (with Quartz vein/coating)

Microcrystalline Quartz (SiO2)

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

Olivine in Basalt (Peridot) (Magnesium Iron Silicate (Mg,Fe)2SiO4 (Mineral) within Basalt (Rock)) — igneous

Olivine in Basalt (Peridot)

Magnesium Iron Silicate (Mg,Fe)2SiO4 (Mineral) within Basalt (Rock)

Sandstone (Arenite (SiO2 based with mineral cement)) — sedimentary

Sandstone

Arenite (SiO2 based with mineral cement)

Chalcedony (Common Opal variant) (Silicon dioxide (SiO2) with microcrystalline structure) — mineral

Chalcedony (Common Opal variant)

Silicon dioxide (SiO2) with microcrystalline structure

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Fossilized Bone Fragment (Permineralized Vertebrate Fossil (Hydroxyapatite replaced by Minerals)) — sedimentary

Fossilized Bone Fragment

Permineralized Vertebrate Fossil (Hydroxyapatite replaced by Minerals)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Specular Hematite (Specularite) in Matrix (Specularite (Fe2O3)) — mineral

Specular Hematite (Specularite) in Matrix

Specularite (Fe2O3)

Amethyst (Silicon Dioxide (SiO2) with iron impurities) — mineral

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Concretion (Sandstone) (Carbonate-cemented Sandstone Concretion) — sedimentary

Concretion (Sandstone)

Carbonate-cemented Sandstone Concretion

Peridot (Olivine (Mg, Fe)2SiO4) — mineral

Peridot

Olivine (Mg, Fe)2SiO4

Picture Jasper (Silicon Dioxide (SiO2) with iron oxide and clay inclusions) — sedimentary

Picture Jasper

Silicon Dioxide (SiO2) with iron oxide and clay inclusions

Quartzite with inclusions (Metamorphic Rock (Mainly SiO2)) — metamorphic

Quartzite with inclusions

Metamorphic Rock (Mainly SiO2)

Quartz (Rock Crystal) (Quartz (SiO₂ - Silicon Dioxide)) — Mineral

Quartz (Rock Crystal)

Quartz (SiO₂ - Silicon Dioxide)

Smoky Quartz (Chlorite Inclusions) (Silicon Dioxide (SiO2) with trace Aluminum and Natural Irradiation) — mineral

Smoky Quartz (Chlorite Inclusions)

Silicon Dioxide (SiO2) with trace Aluminum and Natural Irradiation

Moss Agate (Cryptocrystalline Quartz (SiO2 with Manganese or Iron Oxide inclusions)) — mineral

Moss Agate

Cryptocrystalline Quartz (SiO2 with Manganese or Iron Oxide inclusions)

Chert (Flint variety) (Microcrystalline or Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Flint variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Agate (Silicon Dioxide (SiO2) - variety: Chalcedony) — mineral

Agate

Silicon Dioxide (SiO2) - variety: Chalcedony

Ferruginous Quartz (Quartz (Silicon Dioxide) with Iron Inclusion, SiO2) — mineral

Ferruginous Quartz

Quartz (Silicon Dioxide) with Iron Inclusion, SiO2

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

Rhodonite

Manganese Silicate (Mn,Fe,Mg,Ca)SiO3

Blue Chalcedony (Silicon Dioxide (SiO2)) — mineral

Blue Chalcedony

Silicon Dioxide (SiO2)

Cubic Zirconia (Zirconium dioxide (ZrO2)) — mineral

Cubic Zirconia

Zirconium dioxide (ZrO2)

Aquamarine (Beryl (Be₃Al₂Si₆O₁₈)) — mineral

Aquamarine

Beryl (Be₃Al₂Si₆O₁₈)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Greenschist / Migmatite (Regional Metamorphic Complex (Facies: Greenschist to Amphibolite)) — metamorphic

Greenschist / Migmatite

Regional Metamorphic Complex (Facies: Greenschist to Amphibolite)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Sunstone (Plagioclase Feldspar (specifically Oligoclase variety with hematite or goethite inclusions)
Chemical Formula: (Ca,Na)(Al,Si)2Si2O8) — Mineral

Sunstone

Plagioclase Feldspar (specifically Oligoclase variety with hematite or goethite inclusions) Chemical Formula: (Ca,Na)(Al,Si)2Si2O8

Serpentinite (Serpentinite (group of hydrous magnesium iron phyllosilicates)) — metamorphic

Serpentinite

Serpentinite (group of hydrous magnesium iron phyllosilicates)

Obsidian (Obsidian (Volcanic Glass, SiO2)) — igneous

Obsidian

Obsidian (Volcanic Glass, SiO2)

Sandstone (Arenite (SiO2 primarily)) — sedimentary

Sandstone

Arenite (SiO2 primarily)

Sandstone (likely Arkose) (Arenite (Feldspathic Sandstone / Arkose)) — sedimentary

Sandstone (likely Arkose)

Arenite (Feldspathic Sandstone / Arkose)

Peridot (Olivine) (Magnesium Iron Silicate (Mg,Fe)2SiO4) — mineral

Peridot (Olivine)

Magnesium Iron Silicate (Mg,Fe)2SiO4

Green Rutilated Quartz (Silicon Dioxide with Actinolite inclusions (SiO2 + Ca2(Mg,Fe)5Si8O22(OH)2)) — mineral

Green Rutilated Quartz

Silicon Dioxide with Actinolite inclusions (SiO2 + Ca2(Mg,Fe)5Si8O22(OH)2)

Sandstone (likely Quartzose Sandstone) (Arenite (SiO2 principal composition)) — sedimentary

Sandstone (likely Quartzose Sandstone)

Arenite (SiO2 principal composition)

Sandstone (Quartzose) (Arenite (primarily SiO2)) — sedimentary

Sandstone (Quartzose)

Arenite (primarily SiO2)

Sandstone (Arenite (Sedimentary Rock)) — sedimentary

Sandstone

Arenite (Sedimentary Rock)

Schorl (Black Tourmaline) in Quartz and Feldspar (NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)) — mineral

Schorl (Black Tourmaline) in Quartz and Feldspar

NaFe2+3Al6(Si6O18)(BO3)3(OH)3(OH)

Rough Gemstone Grains (Mixed Sapphires and Quartz) (Corundum (Al2O3) and Quartz (SiO2)) — mineral

Rough Gemstone Grains (Mixed Sapphires and Quartz)

Corundum (Al2O3) and Quartz (SiO2)

Muscovite Mica (KAl2(AlSi3O10)(F,OH)2) — mineral

Muscovite Mica

KAl2(AlSi3O10)(F,OH)2

Schist (Crystalline Metamorphic Rock (Schistose)) — metamorphic

Schist

Crystalline Metamorphic Rock (Schistose)

Citrine (Silicon Dioxide (SiO2)) — mineral

Citrine

Silicon Dioxide (SiO2)