Rock Identifier

Category

Mineral And Glass

Browse mineral and glass specimens identified by the Rock Identifier community.

Learn about Mineral And Glass in the encyclopedia

Sideromelane

Black Obsidian

Maskelynite

Tachylite

Obsidian

Hyalite Opal

Perlite

Opalite

Macusanite

Pink Obsidian

Goldstone

Glauconite

Quartzite Pebble (River Rock) (Quartzite (SiO2)) — metamorphic

Quartzite Pebble (River Rock)

Quartzite (SiO2)

Fluorite (Polished Point/Tower) (Calcium Fluoride (CaF2)) — mineral

Fluorite (Polished Point/Tower)

Calcium Fluoride (CaF2)

Mixed Mineral Collection (with Quartz, Beryl, and host rock) (Silicon Dioxide (Quartz), Be3Al2Si6O18 (Beryl), and associated Schist/Pegmatite) — mineral

Mixed Mineral Collection (with Quartz, Beryl, and host rock)

Silicon Dioxide (Quartz), Be3Al2Si6O18 (Beryl), and associated Schist/Pegmatite

Quartz (Field Stone) (Silicon Dioxide (SiO2)) — mineral

Quartz (Field Stone)

Silicon Dioxide (SiO2)

Sandstone Cobble (Arenite (Sandstone)) — sedimentary

Sandstone Cobble

Arenite (Sandstone)

Quartz (Milky/Common) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky/Common)

Silicon Dioxide (SiO2)

Fluorite (Calcium Fluoride (CaF2)) — mineral

Fluorite

Calcium Fluoride (CaF2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

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

Citrine

Quartz (Silicon Dioxide - SiO2)

Amethyst (Rose de France) (Silicon Dioxide (SiO2) with iron impurities) — mineral

Amethyst (Rose de France)

Silicon Dioxide (SiO2) with iron impurities

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

Granite Pebble

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

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

Quartz (White/Milky)

Silicon Dioxide (SiO2)

Obsidian (Volcanic Glass (predominantly SiO2)) — igneous

Obsidian

Volcanic Glass (predominantly SiO2)

Emerald (or possibly Green Glass / Slag) (Beryl (Be3Al2(SiO3)6)) — gemstone

Emerald (or possibly Green Glass / Slag)

Beryl (Be3Al2(SiO3)6)

Quartz (Silicon dioxide (SiO2)) — mineral

Quartz

Silicon dioxide (SiO2)

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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Orthoclase Feldspar (KAlSi3O8 (Potassium Aluminum Silicate)) — mineral

Orthoclase Feldspar

KAlSi3O8 (Potassium Aluminum Silicate)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz (Agate/Jasper pebble) (Silicon dioxide (SiO2)) — mineral

Quartz (Agate/Jasper pebble)

Silicon dioxide (SiO2)

Quartz (Agate/Jasper pebble) (Silicon Dioxide (SiO2)) — mineral

Quartz (Agate/Jasper pebble)

Silicon Dioxide (SiO2)

Quartz with Epidote inclusions (Silicon Dioxide (SiO2) with Epidote (Ca2(Al,Fe)3(SiO4)3(OH))) — mineral

Quartz with Epidote inclusions

Silicon Dioxide (SiO2) with Epidote (Ca2(Al,Fe)3(SiO4)3(OH))

Botryoidal Chalcedony (Silicon Dioxide (SiO2)) — mineral

Botryoidal Chalcedony

Silicon Dioxide (SiO2)

Quartz (Citrine variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Citrine variety)

Silicon Dioxide (SiO2)

Sandstone (Sandstone (SiO2 rich)) — sedimentary

Sandstone

Sandstone (SiO2 rich)

Sandstone (Sedimentary Rock (Quartz Arenite)) — sedimentary

Sandstone

Sedimentary Rock (Quartz Arenite)

Quartz Vein (Iron-stained) (Silicon Dioxide (SiO2) with limonite/hematite staining) — mineral

Quartz Vein (Iron-stained)

Silicon Dioxide (SiO2) with limonite/hematite staining

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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

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

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Milky Quartz/Yellow Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz/Yellow Quartz

Silicon Dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Feldspar (Plagioclase / Potassium Feldspar) (Feldspar Group (KAlSi3O8 - NaAlSi3O8 - CaAl2Si2O8)) — mineral

Feldspar (Plagioclase / Potassium Feldspar)

Feldspar Group (KAlSi3O8 - NaAlSi3O8 - CaAl2Si2O8)

Milky Quartz with Iron Staining (Silicon Dioxide (SiO2)) — mineral

Milky Quartz with Iron Staining

Silicon Dioxide (SiO2)

Celestite (Celestine (SrSO4)) — mineral

Celestite

Celestine (SrSO4)

Rose Quartz (Quartz (Silicon Dioxide, SiO2) with trace inclusions of dumortierite) — mineral

Rose Quartz

Quartz (Silicon Dioxide, SiO2) with trace inclusions of dumortierite

Quartz-rich breccia or vein quartz fragment (Quartz (SiO₂), likely with iron-oxide staining and attached host rock) — mineral

Quartz-rich breccia or vein quartz fragment

Quartz (SiO₂), likely with iron-oxide staining and attached host rock

Goldstone (aventurine glass) (Man-made copper-bearing glass; not a natural mineral (commonly sold as blue/brown goldstone)) — mineral

Goldstone (aventurine glass)

Man-made copper-bearing glass; not a natural mineral (commonly sold as blue/brown goldstone)

Ruby (Raw Corundum) (Alumina (Al2O3) with Chromium traces) — gemstone

Ruby (Raw Corundum)

Alumina (Al2O3) with Chromium traces

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

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

Milky Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Obsidian (Volcanic Glass (Amorphous Silica)) — igneous

Obsidian

Volcanic Glass (Amorphous Silica)

Milky quartz (Quartz, silicon dioxide (SiO₂)) — mineral

Milky quartz

Quartz, silicon dioxide (SiO₂)