Rock Identifier

Category

Mineral Like Biological Tissue

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

Epidote (Epidote ({Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH))) — mineral

Epidote

Epidote ({Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH))

Chalcedony (specifically Agate or Common Opal variety) (Cryptocrystalline Silica (SiO2)) — mineral

Chalcedony (specifically Agate or Common Opal variety)

Cryptocrystalline Silica (SiO2)

Silver (Native Element / Alloy) (Silver (Ag)) — mineral

Silver (Native Element / Alloy)

Silver (Ag)

Quartz Druzy (on Calcedony/Quartz base) (Silicon Dioxide (SiO2)) — mineral

Quartz Druzy (on Calcedony/Quartz base)

Silicon Dioxide (SiO2)

Agate (translucent slice) (Silicon Dioxide (SiO2) - Microcrystalline Quartz) — mineral

Agate (translucent slice)

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Sandstone (Arenite (SiO2 based)) — sedimentary

Sandstone

Arenite (SiO2 based)

Rutile in Quartz (Rutilated Quartz) (SiO2 with TiO2 inclusions) — Mineral

Rutile in Quartz (Rutilated Quartz)

SiO2 with TiO2 inclusions

Caribbean Calcite (Calcium Carbonate (CaCO3) with Aragonite (CaCO3)) — sedimentary

Caribbean Calcite

Calcium Carbonate (CaCO3) with Aragonite (CaCO3)

Limonite (Iron Ore) (Limonite (FeO(OH)·nH2O)) — mineral

Limonite (Iron Ore)

Limonite (FeO(OH)·nH2O)

Gneiss (Foliated Metamorphic Rock (Gneiss)) — metamorphic

Gneiss

Foliated Metamorphic Rock (Gneiss)

Petrified Wood (Silicified Wood (primarily SiO2)) — sedimentary

Petrified Wood

Silicified Wood (primarily SiO2)

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

Druzy Quartz on Limestone

Silicon Dioxide (SiO2)

Garden Quartz (Lodolite) (Quartz with inclusions (SiO2 + various inclusions such as Chlorite, Hematite, or Feldspar)) — mineral

Garden Quartz (Lodolite)

Quartz with inclusions (SiO2 + various inclusions such as Chlorite, Hematite, or Feldspar)

Schist (Mica Schist) — metamorphic

Schist

Mica Schist

Green Aura Quartz (Titanium treated Kyanite or Quartz) (Silicon Dioxide (SiO2) or Aluminum Silicate (Al2SiO5) with Titanium/Metal Oxide coating) — mineral (man-made aura treatment)

Green Aura Quartz (Titanium treated Kyanite or Quartz)

Silicon Dioxide (SiO2) or Aluminum Silicate (Al2SiO5) with Titanium/Metal Oxide coating

mineral (man-made aura treatment)

Smoky Quartz (Silicon Dioxide (SiO2) with trace aluminum and irradiation) — mineral

Smoky Quartz

Silicon Dioxide (SiO2) with trace aluminum and irradiation

Conglomerate (Conglomerate (clastic sedimentary rock)) — sedimentary

Conglomerate

Conglomerate (clastic sedimentary rock)

Lapis Lazuli (Lapis Lazuli (a rock type, not a single mineral; main component is Lazurite (Na,Ca)8[(S,Cl,SO4,OH)2|(Al6Si6O24)])) — Metamorphic Rock (primarily composed of minerals)

Lapis Lazuli

Lapis Lazuli (a rock type, not a single mineral; main component is Lazurite (Na,Ca)8[(S,Cl,SO4,OH)2|(Al6Si6O24)])

Metamorphic Rock (primarily composed of minerals)

Green Jasper with Quartz veins (Jasper (Silicon Dioxide, SiO2)) — sedimentary

Green Jasper with Quartz veins

Jasper (Silicon Dioxide, SiO2)

Green Schist (Greenschist (composed of Chlorite, Actinolite, and Epidote)) — metamorphic

Green Schist

Greenschist (composed of Chlorite, Actinolite, and Epidote)

Green Aventurine (Silicon Dioxide (SiO2) with inclusions of Fuchsite) — metamorphic

Green Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite

Pyrite (Fool's Gold) (Iron Sulfide (FeS2)) — mineral

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Sandstone (Clastic sedimentary rock (primarily SiO2)) — sedimentary

Sandstone

Clastic sedimentary rock (primarily SiO2)

Sandstone (Arenite (composed primarily of SiO2)) — sedimentary

Sandstone

Arenite (composed primarily of SiO2)

Fluorite (Calcium Fluoride (CaF2)) — mineral

Fluorite

Calcium Fluoride (CaF2)

Yellow Aventurine (Quartz (Silicon Dioxide - SiO2) with inclusions of Mica) — Mineral

Yellow Aventurine

Quartz (Silicon Dioxide - SiO2) with inclusions of Mica

Bornite (Peacock Ore) (Bornite (Cu5FeS4)) — mineral

Bornite (Peacock Ore)

Bornite (Cu5FeS4)

Sandstone (Ferruginous) (Arenite (Fe2O3 staining)) — sedimentary

Sandstone (Ferruginous)

Arenite (Fe2O3 staining)

Carved Mottled Greenish-Yellow Crystal/Glass Object (Unknown; possibly a form of quartz (chalcedony/jadeite/nephrite) or glass/resin.) — Man-made Object/Uncertain Mineral

Carved Mottled Greenish-Yellow Crystal/Glass Object

Unknown; possibly a form of quartz (chalcedony/jadeite/nephrite) or glass/resin.

Man-made Object/Uncertain Mineral

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

Amethyst

Amethyst (Silicon Dioxide - SiO2 with impurities of iron)

Emerald (Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities) — mineral

Emerald

Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities

Dendritic Agate (Silicon Dioxide (SiO2) with Manganese or Iron Oxide inclusions) — mineral

Dendritic Agate

Silicon Dioxide (SiO2) with Manganese or Iron Oxide inclusions

Quartz Geode (Silicon Dioxide (SiO2)) — sedimentary

Quartz Geode

Silicon Dioxide (SiO2)

Gneiss (Metamorphic Rock) (Gneiss) — metamorphic

Gneiss (Metamorphic Rock)

Gneiss

Sandstone (Clastic sedimentary rock (primarily SiO2)) — sedimentary

Sandstone

Clastic sedimentary rock (primarily SiO2)

Lepidolite (K(Li,Al)3(Si,Al)4O10(F,OH)2) — Mineral

Lepidolite

K(Li,Al)3(Si,Al)4O10(F,OH)2

Obsidian (in jewelry setting) (Volcanic Glass (Amorphous Silica)) — igneous

Obsidian (in jewelry setting)

Volcanic Glass (Amorphous Silica)

Bauxite (Bauxite (Mixture including Gibbsite Al(OH)3, Boehmite γ-AlO(OH), and Diaspore α-AlO(OH))) — sedimentary

Bauxite

Bauxite (Mixture including Gibbsite Al(OH)3, Boehmite γ-AlO(OH), and Diaspore α-AlO(OH))

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

Obsidian

Obsidian (Volcanic Glass, SiO2 dominated)

Geode with Quartz Crystal Cavity (Silicon Dioxide (SiO2) in Calcareous/Siliceous Matrix) — sedimentary

Geode with Quartz Crystal Cavity

Silicon Dioxide (SiO2) in Calcareous/Siliceous Matrix

Green Fluorite (Calcium Fluoride (CaF2)) — mineral

Green Fluorite

Calcium Fluoride (CaF2)

Petrified Wood (Silicified Wood (primarily SiO2)) — sedimentary

Petrified Wood

Silicified Wood (primarily SiO2)