Rock Identifier

Category

Mineralological Specimen

Browse mineralological specimen specimens identified by the Rock Identifier community.

Quartzite River Cobble (Quartzite (primarily SiO2)) — metamorphic

Quartzite River Cobble

Quartzite (primarily SiO2)

Quartz (Milky or Iron-Stained) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky or Iron-Stained)

Silicon Dioxide (SiO2)

Gneiss Pebble (Gneiss) — metamorphic

Gneiss Pebble

Gneiss

Granite (Granite (composed primarily of Quartz SiO₂, Alkali Feldspar KAlSi₃O–NaAlSi₃O–CaAl₂Si₂O₈, and Plagioclase Feldspar)) — igneous

Granite

Granite (composed primarily of Quartz SiO₂, Alkali Feldspar KAlSi₃O–NaAlSi₃O–CaAl₂Si₂O₈, and Plagioclase Feldspar)

Quartz Crystal Cluster (Quartz (Silicon Dioxide, SiO2)) — mineral

Quartz Crystal Cluster

Quartz (Silicon Dioxide, SiO2)

Gneiss (River Cobble) (Gneiss (Foliated Metamorphic Rock)) — metamorphic

Gneiss (River Cobble)

Gneiss (Foliated Metamorphic Rock)

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

Petrified Wood

Silicified Wood (primarily SiO2)

Limonite (Yellow Ochre) (Hydrated iron(III) oxide-hydroxide (FeO(OH)·nH2O)) — mineral

Limonite (Yellow Ochre)

Hydrated iron(III) oxide-hydroxide (FeO(OH)·nH2O)

Yellow Chert or Jasper (Microcrystalline Quartz (SiO2)) — sedimentary

Yellow Chert or Jasper

Microcrystalline Quartz (SiO2)

Red Jasper (Jasper (Silicon Dioxide, SiO2)) — mineral

Red Jasper

Jasper (Silicon Dioxide, SiO2)

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

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Mica Schist (Mica Schist (primarily Muscovite and Quartz)) — metamorphic

Mica Schist

Mica Schist (primarily Muscovite and Quartz)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Pyrite in Quartz (Iron Sulfide (FeS2) in Silicon Dioxide (SiO2)) — mineral

Pyrite in Quartz

Iron Sulfide (FeS2) in Silicon Dioxide (SiO2)

Blue Calcite (Calcium Carbonate (CaCO3)) — mineral

Blue Calcite

Calcium Carbonate (CaCO3)

Stichtite (often found in Serpentinite) (Stichtite Mg6Cr2CO3(OH)16·4H2O) — Mineral

Stichtite (often found in Serpentinite)

Stichtite Mg6Cr2CO3(OH)16·4H2O

Schist (Mica Schist (primarily consisting of muscovite, biotite, and quartz)) — metamorphic

Schist

Mica Schist (primarily consisting of muscovite, biotite, and quartz)

Blue Apatite (Fluorapatite / Chlorapatite [Ca5(PO4)3(F,Cl,OH)]) — mineral

Blue Apatite

Fluorapatite / Chlorapatite [Ca5(PO4)3(F,Cl,OH)]

Fuchsite (Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)) — mineral

Fuchsite

Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)

Rose Quartz (Silicon Dioxide (SiO2)) — mineral

Rose Quartz

Silicon Dioxide (SiO2)

Snowflake Obsidian (Volcanic glass containing Spherulite inclusions (primarily Cristobalite, SiO2)) — igneous

Snowflake Obsidian

Volcanic glass containing Spherulite inclusions (primarily Cristobalite, SiO2)

River Chalcedony / Agate (Chalcedony (Silicon Dioxide, SiO2)) — mineral

River Chalcedony / Agate

Chalcedony (Silicon Dioxide, SiO2)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

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

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Labradorite ((Ca, Na)(Al, Si)4O8) — mineral

Labradorite

(Ca, Na)(Al, Si)4O8

Arsenopyrite in Quartz Matrix (Arsenopyrite (FeAsS) with Quartz (SiO2)) — mineral

Arsenopyrite in Quartz Matrix

Arsenopyrite (FeAsS) with Quartz (SiO2)

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

Pyrite (Fool's Gold)

Iron Disulfide (FeS2)

Blue Chalcedony (Microcrystalline Quartz (SiO2)) — mineral

Blue Chalcedony

Microcrystalline Quartz (SiO2)

Wonderstone (Banded Rhyolite) (Rhyolite (Silicon Dioxide with Iron Oxide impurities)) — igneous

Wonderstone (Banded Rhyolite)

Rhyolite (Silicon Dioxide with Iron Oxide impurities)

Turquoise (Hydrous phosphate of copper and aluminum (CuAl6(PO4)4(OH)8·4H2O)) — mineral

Turquoise

Hydrous phosphate of copper and aluminum (CuAl6(PO4)4(OH)8·4H2O)

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

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

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Moss Agate (Chalcedony (SiO2) with inclusions of manganese or iron oxides) — mineral

Moss Agate

Chalcedony (SiO2) with inclusions of manganese or iron oxides

Smoky Quartz (with inclusions) (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz (with inclusions)

Silicon Dioxide (SiO2)

Pyrite (Iron Disulfide (FeS2)) — mineral

Pyrite

Iron Disulfide (FeS2)

Botryoidal Malachite (Malachite - Cu2CO3(OH)2) — mineral

Botryoidal Malachite

Malachite - Cu2CO3(OH)2

Quartz (Crystal Cluster) (Silicon Dioxide (SiO2)) — mineral

Quartz (Crystal Cluster)

Silicon Dioxide (SiO2)

Charoite (Charoite (Hydrated potassium sodium calcium barium strontium silicate hydroxyfluoride)) — metamorphic

Charoite

Charoite (Hydrated potassium sodium calcium barium strontium silicate hydroxyfluoride)

Blue Kyanite in Quartz (Kyanite (Al2SiO5)) — mineral

Blue Kyanite in Quartz

Kyanite (Al2SiO5)

Black Kyanite (Kyanite (Al2SiO5) with carbonaceous inclusions) — mineral

Black Kyanite

Kyanite (Al2SiO5) with carbonaceous inclusions

Sodalite (Sodalite: Na8(Al6Si6O24)Cl2) — mineral

Sodalite

Sodalite: Na8(Al6Si6O24)Cl2

Pyrite in Matrix (likely Quartz or Coal) (Iron Sulfide (FeS2)) — mineral

Pyrite in Matrix (likely Quartz or Coal)

Iron Sulfide (FeS2)