Rock Identifier

Category

Mineral (Evaporite)

Browse mineral (evaporite) specimens identified by the Rock Identifier community.

Fossil Sand Dollar (Echinoidea) (Phylum Echinodermata, Class Echinoidea (likely Dendraster or Scutella)) — sedimentary

Fossil Sand Dollar (Echinoidea)

Phylum Echinodermata, Class Echinoidea (likely Dendraster or Scutella)

Spinosaurid Dinosaur Tooth (Spinosaurus aegyptiacus (fossilized)) — fossil

Spinosaurid Dinosaur Tooth

Spinosaurus aegyptiacus (fossilized)

Spinosaurus Tooth (Spinosaurus aegyptiacus (fossilized in Hydroxyapatite)) — sedimentary

Spinosaurus Tooth

Spinosaurus aegyptiacus (fossilized in Hydroxyapatite)

Granite (Granite (a plutonic rock)) — Igneous

Granite

Granite (a plutonic rock)

Amygdaloidal Basalt with Agate/Chalcedony Infills (Amygdaloidal Basalt (Composition: SiO2 and (Mg,Fe)2SiO4 in matrix; SiO2 in amygdule)) — igneous

Amygdaloidal Basalt with Agate/Chalcedony Infills

Amygdaloidal Basalt (Composition: SiO2 and (Mg,Fe)2SiO4 in matrix; SiO2 in amygdule)

Tiger's Eye (Pseudomorph of Quartz after Crocidolite (SiO2)) — metamorphic

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

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

Granite

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

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

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Granitic Pegmatite (Coarse-grained Igneous Rock (Granitic composition: KAlSi3O8, SiO2)) — igneous

Granitic Pegmatite

Coarse-grained Igneous Rock (Granitic composition: KAlSi3O8, SiO2)

Pyrite (Iron Disulfide (FeS2)) — mineral

Pyrite

Iron Disulfide (FeS2)

Red Vanadinite on Matrix (Vanadinite (Pb5(VO4)3Cl)) — mineral

Red Vanadinite on Matrix

Vanadinite (Pb5(VO4)3Cl)

Schist (Mica Schist) — metamorphic

Schist

Mica Schist

Granite Cobble (River Stone) (Felsic intrusive igneous rock (composition: Quartz, Feldspar, Mica)) — igneous

Granite Cobble (River Stone)

Felsic intrusive igneous rock (composition: Quartz, Feldspar, Mica)

Gneiss (Gneiss) — metamorphic

Gneiss

Gneiss

Pink Granite (Granite (Phaneritic igneous rock rich in Alkali Feldspar and Quartz)) — igneous

Pink Granite

Granite (Phaneritic igneous rock rich in Alkali Feldspar and Quartz)

Wishing Stone (Basalt or Mudstone with Quartz/Calcite Veins) (Hydrothermally veined Basalt (SiO2/CaCO3 intrusions)) — igneous or sedimentary

Wishing Stone (Basalt or Mudstone with Quartz/Calcite Veins)

Hydrothermally veined Basalt (SiO2/CaCO3 intrusions)

igneous or sedimentary

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

Granite

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

Red Jade (Dyed Quartzite) (Silicon Dioxide (SiO2) - variety Quartzite) — metamorphic

Red Jade (Dyed Quartzite)

Silicon Dioxide (SiO2) - variety Quartzite

Granite (Phaneritic Felsic Igneous Rock (Granite)) — igneous

Granite

Phaneritic Felsic Igneous Rock (Granite)

Man-made Polished Porcelain Tile (Artificial Geologic Lookalike) (Fused Silicate Ceramic with Alumina (Synthetic Kaolinite derivative)) — Synthetic (Ceramic)

Man-made Polished Porcelain Tile (Artificial Geologic Lookalike)

Fused Silicate Ceramic with Alumina (Synthetic Kaolinite derivative)

Synthetic (Ceramic)

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

Milky Quartz Pebble

Quartz (Silicon Dioxide - SiO2)

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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Pink Granite (Granite (Alkali-feldspar granite)) — igneous

Pink Granite

Granite (Alkali-feldspar granite)

Gneiss (Banded Gneiss) (Gneiss) — metamorphic

Gneiss (Banded Gneiss)

Gneiss

Granite (Plutonic felsic igneous rock) — igneous

Granite

Plutonic felsic igneous rock

Granite (Phaneritic Plutonic Igneous Rock (Rich in SiO2)) — igneous

Granite

Phaneritic Plutonic Igneous Rock (Rich in SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Diorite (Diorite (Intermediate intrusive igneous rock)) — igneous

Diorite

Diorite (Intermediate intrusive igneous rock)

Wishing Stone (Greenschist or Basalt with Quartz/Calcite Vein) — metamorphic

Wishing Stone

Greenschist or Basalt with Quartz/Calcite Vein

Granite (Phaneritic plutonic rock (approx. 20-60% quartz, 35-90% feldspar)) — igneous

Granite

Phaneritic plutonic rock (approx. 20-60% quartz, 35-90% feldspar)

Yellow Jasper (SiO2 (Silicon Dioxide)) — sedimentary

Yellow Jasper

SiO2 (Silicon Dioxide)

Greenschist (Chlorite schist (Metamorphic rock dominated by chlorite, epidote, and actinolite)) — metamorphic

Greenschist

Chlorite schist (Metamorphic rock dominated by chlorite, epidote, and actinolite)

Granite (Granite (Mainly Quartz, Alkali Feldspar, and Plagioclase)) — igneous

Granite

Granite (Mainly Quartz, Alkali Feldspar, and Plagioclase)

Quartz (Water-worn pebble) (Silicon Dioxide (SiO2)) — mineral

Quartz (Water-worn pebble)

Silicon Dioxide (SiO2)

Granite (Granite (Felsic Plutonic Rock)) — igneous

Granite

Granite (Felsic Plutonic Rock)

Sodalite (Na8(Al6Si6O24)Cl2) — mineral

Sodalite

Na8(Al6Si6O24)Cl2

Shale (with minor calcite veining) (Clastic sedimentary rock (primarily clay minerals and quartz)) — sedimentary

Shale (with minor calcite veining)

Clastic sedimentary rock (primarily clay minerals and quartz)

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

Gneiss

High-grade metamorphic rock (Gneiss)

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

Granite Gneiss

Gneiss (High-grade metamorphic rock)

Granite (Granite (Phaneritic intrusive igneous rock)) — igneous

Granite

Granite (Phaneritic intrusive igneous rock)

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

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Pegmatite (Granite Pegmatite) (Intrusive Igneous Rock (Granite Pegmatite)) — igneous

Pegmatite (Granite Pegmatite)

Intrusive Igneous Rock (Granite Pegmatite)