Rock Identifier

Category

Mineral Like Biological Tissue

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

Quartz (specifically Clear Quartz or Rock Crystal) (Silicon Dioxide (SiO2)) — mineral

Quartz (specifically Clear Quartz or Rock Crystal)

Silicon Dioxide (SiO2)

Basalt (Extrusive mafic igneous rock) — igneous

Basalt

Extrusive mafic igneous rock

Chert / Flint (Silicon Dioxide (SiO2)) — sedimentary

Chert / Flint

Silicon Dioxide (SiO2)

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

Chert (Iron-stained)

Silicon Dioxide (SiO2)

Fire Agate (Crackle Agate) (Silicon Dioxide (SiO2) - Cryptocrystalline Quartz) — mineral

Fire Agate (Crackle Agate)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Green Onyx (Banded Calcite) (Banded Calcite / Aragonite (CaCO3)) — mineral

Green Onyx (Banded Calcite)

Banded Calcite / Aragonite (CaCO3)

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

Agate (Silicon Dioxide (SiO2)) — mineral

Agate

Silicon Dioxide (SiO2)

Blue Dyed Agate (Silicon Dioxide (SiO2)) — mineral

Blue Dyed Agate

Silicon Dioxide (SiO2)

Chalcedony (Agate/Carnelian variant) (Silicon Dioxide (SiO2)) — mineral

Chalcedony (Agate/Carnelian variant)

Silicon Dioxide (SiO2)

Yellow Chalcedony (Agate/Jasper mix) (Silicon Dioxide (SiO2)) — mineral

Yellow Chalcedony (Agate/Jasper mix)

Silicon Dioxide (SiO2)

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

Dyed Blue Agate (Cryptocrystalline Quartz (SiO2)) — mineral

Dyed Blue Agate

Cryptocrystalline Quartz (SiO2)

Sandstone (Arenite (Siliclastic Sedimentary Rock)) — sedimentary

Sandstone

Arenite (Siliclastic Sedimentary Rock)

Sandstone (Ferruginous) (Arenite (composed primarily of SiO2 with Fe2O3 staining)) — sedimentary

Sandstone (Ferruginous)

Arenite (composed primarily of SiO2 with Fe2O3 staining)

Tumbled Stone Collection (featuring Tiger's Eye, Rose Quartz, and Moss Agate) (Mixed Silicates and Oxides (predominantly SiO2 group minerals)) — mineral

Tumbled Stone Collection (featuring Tiger's Eye, Rose Quartz, and Moss Agate)

Mixed Silicates and Oxides (predominantly SiO2 group minerals)

Gneiss (specifically a Banded Gneiss pebble) (Gneiss (High-grade Regional Metamorphic Rock)) — metamorphic

Gneiss (specifically a Banded Gneiss pebble)

Gneiss (High-grade Regional Metamorphic Rock)

Amethyst (Geode/Druzy) (Silicon Dioxide (SiO2) with iron impurities) — mineral

Amethyst (Geode/Druzy)

Silicon Dioxide (SiO2) with iron impurities

Rainbow Moonstone with Black Tourmaline (White Labradorite (Feldspar variety, (Na,Ca)(Al,Si)4O8) with Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)) — mineral

Rainbow Moonstone with Black Tourmaline

White Labradorite (Feldspar variety, (Na,Ca)(Al,Si)4O8) with Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)

Granite (specifically the Ubatuba variety) (Phaneritic Igneous Rock (Granodiorite/Monzogranite)) — igneous

Granite (specifically the Ubatuba variety)

Phaneritic Igneous Rock (Granodiorite/Monzogranite)

Sandstone (Quartz-rich) (Sandstone (SiO2 dominated)) — sedimentary

Sandstone (Quartz-rich)

Sandstone (SiO2 dominated)

Sand Grain (Silica/Quartz Grain) (Silicon Dioxide (SiO2)) — sedimentary

Sand Grain (Silica/Quartz Grain)

Silicon Dioxide (SiO2)

Jasper with Agate Inclusions (Silicon Dioxide (SiO2) - variety of Quartz/Chert) — sedimentary

Jasper with Agate Inclusions

Silicon Dioxide (SiO2) - variety of Quartz/Chert

Petrified Wood (Silicified Wood (SiO2)) — sedimentary

Petrified Wood

Silicified Wood (SiO2)

Plume Agate (Silicon Dioxide (SiO2)) — mineral

Plume Agate

Silicon Dioxide (SiO2)

Rose Quartz (Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese) — mineral

Rose Quartz

Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese

Pyrite (Iron Disulfide (FeS2)) — mineral

Pyrite

Iron Disulfide (FeS2)

Sandstone (Ferruginous) (Arenite with Iron Oxide cement (primarily SiO2 with Fe2O3)) — sedimentary

Sandstone (Ferruginous)

Arenite with Iron Oxide cement (primarily SiO2 with Fe2O3)

Granite (Orthoclase rich) (Granite (composed primarily of Quartz and Potassium Feldspar KAlSi3O8)) — igneous

Granite (Orthoclase rich)

Granite (composed primarily of Quartz and Potassium Feldspar KAlSi3O8)

Amazonite (Microcline (variety Amazonite), K(AlSi3O8)) — mineral

Amazonite

Microcline (variety Amazonite), K(AlSi3O8)

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

Olivine (Peridot)

Magnesium Iron Silicate (Mg,Fe)2SiO4

Sandstone (Arenite (SiO2 based)) — sedimentary

Sandstone

Arenite (SiO2 based)

Ferruginous Sandstone (Arenite with Iron-Oxide Cement (FeO(OH)·nH2O / Fe2O3)) — sedimentary

Ferruginous Sandstone

Arenite with Iron-Oxide Cement (FeO(OH)·nH2O / Fe2O3)

Green Aventurine (Silicon Dioxide (Quartz) with Fuchsite inclusions (K(Al,Cr)2(AlSi3O10)(OH)2)) — metamorphic

Green Aventurine

Silicon Dioxide (Quartz) with Fuchsite inclusions (K(Al,Cr)2(AlSi3O10)(OH)2)

Sandstone Beach Pebble (Clastic sedimentary rock (SiO2 with iron oxide cement)) — sedimentary

Sandstone Beach Pebble

Clastic sedimentary rock (SiO2 with iron oxide cement)

Quartz (Microcrystalline/Macro crystalline variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Microcrystalline/Macro crystalline variety)

Silicon Dioxide (SiO2)

Unakite (Unakite (Metasomatized Granite)) — metamorphic

Unakite

Unakite (Metasomatized Granite)

Sandstone (Ferruginous) (Arenite (primarily SiO2 with iron oxide cement)) — sedimentary

Sandstone (Ferruginous)

Arenite (primarily SiO2 with iron oxide cement)

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

Bornite (Peacock Ore)

Bornite (Cu5FeS4)

Moss Agate (Agate (Silicon Dioxide, SiO2) with dendritic inclusions) — sedimentary

Moss Agate

Agate (Silicon Dioxide, SiO2) with dendritic inclusions

White Marble (Recrystallized Calcite (CaCO3)) — metamorphic

White Marble

Recrystallized Calcite (CaCO3)

Red Sandstone (Arenite (primarily SiO2 with hematite/iron oxide coating)) — sedimentary

Red Sandstone

Arenite (primarily SiO2 with hematite/iron oxide coating)