Rock Identifier

Category

Mineral Like Biological Tissue

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

Learn about Mineral Like Biological Tissue in the encyclopedia

Blue Line Jasper

Lime Green Tourmaline

Lime Green Tourmaline

Glauconite

Hutcheonite

Halite

Sperrylite

Baddeleyite

Anatase

Brookite

Talc

Euxenite

Eltyubyuite

Sandstone (Red/Brown Sandstone pebble) (Arenite (SiO2 dominated sandstone)) — sedimentary

Sandstone (Red/Brown Sandstone pebble)

Arenite (SiO2 dominated sandstone)

Clear Quartz (Tumbled) (Silicon Dioxide (SiO2)) — mineral

Clear Quartz (Tumbled)

Silicon Dioxide (SiO2)

Gneiss (Gneiss (High-grade metamorphic rock)) — metamorphic

Gneiss

Gneiss (High-grade metamorphic rock)

Mica-rich Schist fragment (Mica Schist) — metamorphic

Mica-rich Schist fragment

Mica Schist

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Ruby (Corundum (Al2O3)) — gemstone

Ruby

Corundum (Al2O3)

Slate (Slate (Foliated Metamorphic Rock)) — metamorphic

Slate

Slate (Foliated Metamorphic Rock)

Almandine Garnet (Almandine (Fe3Al2(SiO4)3)) — gemstone

Almandine Garnet

Almandine (Fe3Al2(SiO4)3)

Gneiss (Gneiss (High-grade metamorphic rock)) — metamorphic

Gneiss

Gneiss (High-grade metamorphic rock)

Granite (Phaneritic Felsic Intrusive Igneous Rock) — igneous

Granite

Phaneritic Felsic Intrusive Igneous Rock

Basalt with Weathering Crust (Extrusive mafic volcanic rock) — igneous

Basalt with Weathering Crust

Extrusive mafic volcanic rock

Limonite (Iron Ore) (FeO(OH)·nH2O (Hydrous ferric oxide)) — mineral

Limonite (Iron Ore)

FeO(OH)·nH2O (Hydrous ferric oxide)

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

Amethyst

Amethyst (Silicon Dioxide - SiO2 with impurities of iron)

Magnetite (Magnetite (Fe3O4)) — mineral

Magnetite

Magnetite (Fe3O4)

Microcline Feldspar (KAlSi3O8) — mineral

Microcline Feldspar

KAlSi3O8

Amygdaloidal Basalt with Quartz Veining (Basalt (Extrusive Igneous Rock) with Quartz (SiO2) veining) — igneous

Amygdaloidal Basalt with Quartz Veining

Basalt (Extrusive Igneous Rock) with Quartz (SiO2) veining

Lepidolite with Quartz (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2) — mineral

Lepidolite with Quartz

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

Sandstone (Arenite (primarily Quartz-rich)) — sedimentary

Sandstone

Arenite (primarily Quartz-rich)

Mixed Gemstone and Mineral Collection (Silicon Dioxide (SiO2) based minerals and others) — mineral

Mixed Gemstone and Mineral Collection

Silicon Dioxide (SiO2) based minerals and others

Banded Gneiss (with possible weathered sulfide or iron staining) (Gneiss, potentially with iron oxide/hydroxide staining (e.g., limonite) or weathered sulfides) — Metamorphic

Banded Gneiss (with possible weathered sulfide or iron staining)

Gneiss, potentially with iron oxide/hydroxide staining (e.g., limonite) or weathered sulfides

Gneiss (Gneiss (high-grade metamorphic rock)) — metamorphic

Gneiss

Gneiss (high-grade metamorphic rock)

Vesicular Basalt (Scoria) (Basalt (Extrusive Igneous Rock)) — igneous

Vesicular Basalt (Scoria)

Basalt (Extrusive Igneous Rock)

Greenstone (or River-tumbled Basalt / Greywacke with Epidote) (Metabasalt / Greenschist facies rock) — metamorphic

Greenstone (or River-tumbled Basalt / Greywacke with Epidote)

Metabasalt / Greenschist facies rock

Green Jasper (Jasper (Silicon Dioxide, SiO2)) — sedimentary

Green Jasper

Jasper (Silicon Dioxide, SiO2)

Silicon Carbide (Carborundum) (Moissanite (SiC)) — mineral

Silicon Carbide (Carborundum)

Moissanite (SiC)

Quartzwacke / Impure Sandstone (Arenite with minor lithic fragments (Silicon Dioxide matrix)) — sedimentary

Quartzwacke / Impure Sandstone

Arenite with minor lithic fragments (Silicon Dioxide matrix)

Arsenopyrite with Schist Matrix (Arsenopyrite (FeAsS)) — mineral

Arsenopyrite with Schist Matrix

Arsenopyrite (FeAsS)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Conglomerate (Conglomerate (clastic sedimentary rock)) — sedimentary

Conglomerate

Conglomerate (clastic sedimentary rock)

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

Muscovite Mica

Muscovite, KAl2(AlSi3O10)(OH)2

Raw smoky quartz with dark mineral inclusions (Quartz (SiO₂), likely smoky quartz; dark inclusions may be chlorite, tourmaline, or iron/manganese oxides) — mineral

Raw smoky quartz with dark mineral inclusions

Quartz (SiO₂), likely smoky quartz; dark inclusions may be chlorite, tourmaline, or iron/manganese oxides

Quartz Geode (Silicon Dioxide (SiO2)) — mineral

Quartz Geode

Silicon Dioxide (SiO2)

Banded Agate (specifically Carnelian Agate) (Silicon Dioxide (SiO2)) — mineral

Banded Agate (specifically Carnelian Agate)

Silicon Dioxide (SiO2)

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

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

White Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Granite (Phaneritic Igneous Rock (composed primarily of Quartz, Feldspar, and Mica)) — igneous

Granite

Phaneritic Igneous Rock (composed primarily of Quartz, Feldspar, and Mica)

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

Quartz Druzy on Matrix

Silicon Dioxide (SiO2)

Gneiss (specifically Banded Gneiss) (Gneiss) — metamorphic

Gneiss (specifically Banded Gneiss)

Gneiss

Agate (Agate (Microcrystalline Quartz, SiO2)) — mineral

Agate

Agate (Microcrystalline Quartz, SiO2)

Shungite (Shungite (carbon-rich Precambrian mineraloid)) — mineral

Shungite

Shungite (carbon-rich Precambrian mineraloid)

Fossilized Echinoid (Sea Urchin) or Brachiopod (Echinoidea / Invertebrate Fossil) — fossil

Fossilized Echinoid (Sea Urchin) or Brachiopod

Echinoidea / Invertebrate Fossil

Red Sandstone (Iron-Rich) (Arenite (Fe2O3)) — sedimentary

Red Sandstone (Iron-Rich)

Arenite (Fe2O3)