Rock Identifier

Category

Mineral (Synthetic Glass)

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

Learn about Mineral (Synthetic Glass) in the encyclopedia

Opalite

Porphyritic Obsidian

Porphyritic Obsidian

Gold Sheen Obsidian

Starry Night Obsidian

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

Quartz (Citrine or Iron-Stained)

Silicon Dioxide (SiO2)

Red Sandstone (Arenite (primarily SiO2 with Fe2O3)) — sedimentary

Red Sandstone

Arenite (primarily SiO2 with Fe2O3)

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

Milky quartz (rough quartz specimen)

Quartz, silicon dioxide (SiO₂)

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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

White Quartz with Black Tourmaline (Silicon Dioxide (SiO2) with Schorl (NaFe2+3Al6(Si6O18)(BO3)3(OH)3OH)) — mineral

White Quartz with Black Tourmaline

Silicon Dioxide (SiO2) with Schorl (NaFe2+3Al6(Si6O18)(BO3)3(OH)3OH)

Quartz pebble (Silicon dioxide (SiO2)) — sedimentary

Quartz pebble

Silicon dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Green Calcite or Prasiolite (Green Quartz) (Calcium carbonate (CaCO3) or Silicon dioxide (SiO2)) — mineral

Green Calcite or Prasiolite (Green Quartz)

Calcium carbonate (CaCO3) or Silicon dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Quartz (Iron-stained) (Silicon Dioxide (SiO2)) — mineral

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Quartz (Gray or Smoky variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Gray or Smoky variety)

Silicon Dioxide (SiO2)

Quartz pebble (Silicon dioxide (SiO2)) — Mineral

Quartz pebble

Silicon dioxide (SiO2)

Green Aventurine (Silicon dioxide (SiO2) with inclusions of Fuchsite mica) — metamorphic

Green Aventurine

Silicon dioxide (SiO2) with inclusions of Fuchsite mica

Tektite (Natural impact glass) — meteorite

Tektite

Natural impact glass

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

Orthoclase Feldspar

KAlSi3O8 (Potassium Aluminum Silicate)

Cullet (Slag Glass) (Amorphous Silica (SiO2) with various metal oxide colorants) — mineraloid / anthropogenic

Cullet (Slag Glass)

Amorphous Silica (SiO2) with various metal oxide colorants

mineraloid / anthropogenic

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

Quartz with Iron Stains

Silicon Dioxide (SiO2) with FeOx inclusions

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

Chert (Flint)

Silicon Dioxide (SiO2)

White Quartz Pendant (Silicon Dioxide (SiO2)) — mineral

White Quartz Pendant

Silicon Dioxide (SiO2)

Quartz pebble (SiO2) — mineral

Quartz pebble

SiO2

Quartz pebble (Silicon dioxide (SiO2)) — mineral

Quartz pebble

Silicon dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Weathered granite or granitic gneiss slab (Granitic rock, chiefly quartz, feldspar, and mica; exact identification is uncertain from the photograph) — igneous

Weathered granite or granitic gneiss slab

Granitic rock, chiefly quartz, feldspar, and mica; exact identification is uncertain from the photograph

Milk Quartz (Tumbled Pebble) (Quartz (Silicon Dioxide, SiO2)) — mineral

Milk Quartz (Tumbled Pebble)

Quartz (Silicon Dioxide, SiO2)

Sandstone (Clastic Sedimentary Rock) — sedimentary

Sandstone

Clastic Sedimentary Rock

Quartz crystal cluster in matrix (Silicon dioxide (SiO2)) — mineral

Quartz crystal cluster in matrix

Silicon dioxide (SiO2)

Sandstone (Sedimentary Clastic Rock (Quartz-rich)) — sedimentary

Sandstone

Sedimentary Clastic Rock (Quartz-rich)

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

Quartz (Field Stone)

Silicon Dioxide (SiO2)

Quartz (Gravel Fragment) (Silicon Dioxide (SiO2)) — mineral

Quartz (Gravel Fragment)

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

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

Quartz (Milky/Tan)

Silicon Dioxide (SiO2)

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

Quartz (Tumbled)

Silicon Dioxide (SiO2)

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

Quartz (Vein Quartz)

Silicon Dioxide (SiO2)

Black Obsidian (Volcanic Glass (predominantly SiO2)) — igneous

Black Obsidian

Volcanic Glass (predominantly SiO2)

River Quartz Cobble (Silicon Dioxide (SiO2)) — mineral

River Quartz Cobble

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Snowflake Obsidian (Volcanic Glass with Spherulite inclusions (mainly Cristobalite)) — igneous

Snowflake Obsidian

Volcanic Glass with Spherulite inclusions (mainly Cristobalite)

Quartz Geode (Silicon dioxide (SiO2)) — mineral

Quartz Geode

Silicon dioxide (SiO2)

Amethyst cluster (Quartz, SiO₂; purple coloration is caused mainly by iron-related defects and natural irradiation) — mineral

Amethyst cluster

Quartz, SiO₂; purple coloration is caused mainly by iron-related defects and natural irradiation

Quartz Pebble with Hematite Inclusion (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble with Hematite Inclusion

Silicon Dioxide (SiO2)