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

Jasper (Microcrystalline quartz (SiO2)) — sedimentary

Jasper

Microcrystalline quartz (SiO2)

Quartz with Schist Inclusion (Crystalline Silicon Dioxide (SiO2) with Muscovite/Biotite Schist) — metamorphic

Quartz with Schist Inclusion

Crystalline Silicon Dioxide (SiO2) with Muscovite/Biotite Schist

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Weathered quartz-rich stone, possibly chalcedony or calcite (Likely microcrystalline quartz (SiO₂) or calcite (CaCO₃); exact identification requires testing) — mineral

Weathered quartz-rich stone, possibly chalcedony or calcite

Likely microcrystalline quartz (SiO₂) or calcite (CaCO₃); exact identification requires testing

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Quartz (Smoky/Milky variety with matrix) (Silicon Dioxide (SiO2)) — mineral

Quartz (Smoky/Milky variety with matrix)

Silicon Dioxide (SiO2)

Likely quartz fragment (Quartz (silicon dioxide, SiO₂), possibly milky quartz or quartz-rich rock) — mineral

Likely quartz fragment

Quartz (silicon dioxide, SiO₂), possibly milky quartz or quartz-rich rock

Green Aventurine (SiO2 (Quartz with Fuchsite inclusions)) — mineral

Green Aventurine

SiO2 (Quartz with Fuchsite inclusions)

Quartz with Iron Stains (Silicon Dioxide (SiO2) with FeOx inclusions) — mineral

Quartz with Iron Stains

Silicon Dioxide (SiO2) with FeOx inclusions

Tumbled green aventurine (probable) (Quartz, SiO₂, with green fuchsite mica inclusions) — mineral

Tumbled green aventurine (probable)

Quartz, SiO₂, with green fuchsite mica inclusions

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

Potassium Feldspar (Orthoclase)

Orthoclase (KAlSi3O8)

Quartz pebble (Silicon Dioxide (SiO2)) — mineral

Quartz pebble

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — Mineral

Quartz Pebble

Silicon Dioxide (SiO2)

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

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Quartz with Host Rock (Silicon Dioxide (SiO2)) — mineral

Quartz with Host Rock

Silicon Dioxide (SiO2)

Obsidian (Volcanic Glass (SiO2 + impurities)) — igneous

Obsidian

Volcanic Glass (SiO2 + impurities)

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

Druzzy Quartz on Matrix

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon dioxide (SiO2)) — mineral

Quartz Pebble

Silicon dioxide (SiO2)

Sandstone (Clastic Sedimentary Rock) — sedimentary

Sandstone

Clastic Sedimentary Rock

Sandstone (Sedimentary Rock (Quartz arenite / Lithic sandstone)) — sedimentary

Sandstone

Sedimentary Rock (Quartz arenite / Lithic sandstone)

Sandstone (Quartzite-rich) (Clastic Sedimentary Rock (primarily SiO2)) — sedimentary

Sandstone (Quartzite-rich)

Clastic Sedimentary Rock (primarily SiO2)

Sandstone (Arenite (primarily SiO2 with various cementing agents)) — sedimentary

Sandstone

Arenite (primarily SiO2 with various cementing agents)

Sandstone (Clastic sedimentary rock (primarily SiO2)) — sedimentary

Sandstone

Clastic sedimentary rock (primarily SiO2)

Sandstone (Clastic Sedimentary Rock (composed mostly of quartz, SiO2)) — sedimentary

Sandstone

Clastic Sedimentary Rock (composed mostly of quartz, SiO2)

Sandstone (Beach Pebble) (Clastic sedimentary rock (primarily Quartz and Feldspar)) — sedimentary

Sandstone (Beach Pebble)

Clastic sedimentary rock (primarily Quartz and Feldspar)

Sandstone (Arenite (SiO2 principal)) — sedimentary

Sandstone

Arenite (SiO2 principal)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Quartz (Iron-Stained / Yellow Quartz) (Silicon Dioxide (SiO2)) — mineral

Quartz (Iron-Stained / Yellow Quartz)

Silicon Dioxide (SiO2)

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

Quartz on Matrix

Silicon Dioxide (SiO2)

Polished orbicular jasper (likely ocean jasper) (Silicified microcrystalline quartz/chalcedony with iron-oxide-rich orbicules; commonly called Ocean Jasper) — mineral

Polished orbicular jasper (likely ocean jasper)

Silicified microcrystalline quartz/chalcedony with iron-oxide-rich orbicules; commonly called Ocean Jasper

White Topaz (Al2SiO4(F,OH)2) — mineral

White Topaz

Al2SiO4(F,OH)2

Tumbled chalcedony (likely carnelian/opaque agate) (Microcrystalline quartz, SiO₂; chalcedony with iron-oxide staining) — mineral

Tumbled chalcedony (likely carnelian/opaque agate)

Microcrystalline quartz, SiO₂; chalcedony with iron-oxide staining

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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Moss Agate (Chalcedony (Silicon Dioxide, SiO2) with inclusions) — mineral

Moss Agate

Chalcedony (Silicon Dioxide, SiO2) with inclusions

Silicon (Silicon (Si)) — mineral

Silicon

Silicon (Si)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Sandstone (Arenite (clastic sedimentary rock)) — sedimentary

Sandstone

Arenite (clastic sedimentary rock)

Tumbled milky quartz (Quartz (silicon dioxide, SiO₂)) — mineral

Tumbled milky quartz

Quartz (silicon dioxide, SiO₂)

Sandstone (Arenite (SiO2 based)) — sedimentary

Sandstone

Arenite (SiO2 based)