Rock Identifier

Category

Mineraloid (Man Made Glass)

Browse mineraloid (man made glass) specimens identified by the Rock Identifier community.

Learn about Mineraloid (Man Made Glass) in the encyclopedia

Opalite

Goldstone

Shungite

Blue Goldstone

Sideromelane

Black Obsidian

Maskelynite

Obsidian

Tachylite

Map Jasper

Hyalite Opal

Perlite

Pumice (Pumice (Volcanic glass / Silicic extrusive rock)) — igneous

Pumice

Pumice (Volcanic glass / Silicic extrusive rock)

Pumice (Pumice (Vesicular Felsic Igneous Rock)) — igneous

Pumice

Pumice (Vesicular Felsic Igneous Rock)

Pumice (Felsic/intermediate vesicular extrusive rock) — igneous

Pumice

Felsic/intermediate vesicular extrusive rock

Pumice (Pumice (Silicic volcanic glass with vesicular texture)) — igneous

Pumice

Pumice (Silicic volcanic glass with vesicular texture)

Pumice (Pumice (volcanic glass with vesicular texture)) — igneous

Pumice

Pumice (volcanic glass with vesicular texture)

Pumice (Pumice (volcanic glass with vesicular texture)) — igneous

Pumice

Pumice (volcanic glass with vesicular texture)

Snowflake Obsidian (Spherulitic Obsidian (SiO2 + impurities)) — igneous

Snowflake Obsidian

Spherulitic Obsidian (SiO2 + impurities)

Pumice (Pumice (a highly vesicular felsic volcanic rock)) — igneous

Pumice

Pumice (a highly vesicular felsic volcanic rock)

Pumice (Pumice (a highly vesicular volcanic glass)) — igneous

Pumice

Pumice (a highly vesicular volcanic glass)

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

Milky quartz (rough quartz chunk)

Quartz, silicon dioxide (SiO₂)

Tumbled orange chalcedony (likely carnelian) (Cryptocrystalline quartz, SiO₂; carnelian is orange-red chalcedony colored mainly by iron oxides) — gemstone

Tumbled orange chalcedony (likely carnelian)

Cryptocrystalline quartz, SiO₂; carnelian is orange-red chalcedony colored mainly by iron oxides

Tumbled milky quartz (Quartz (SiO₂), likely massive milky quartz) — mineral

Tumbled milky quartz

Quartz (SiO₂), likely massive milky quartz

Polished carnelian (reddish-brown chalcedony) (Carnelian, a microcrystalline variety of quartz (SiO₂)) — gemstone

Polished carnelian (reddish-brown chalcedony)

Carnelian, a microcrystalline variety of quartz (SiO₂)

Likely weathered brown quartz-bearing rock (Tentatively weathered granite or granitic gneiss; exact identification is uncertain from the photograph) — igneous

Likely weathered brown quartz-bearing rock

Tentatively weathered granite or granitic gneiss; exact identification is uncertain from the photograph

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

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

Quartz Crystal Rock

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Quartz with inclusions (SiO2) — mineral

Quartz with inclusions

SiO2

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Quartz (Milky/Clear Variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky/Clear Variety)

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

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

Quartz (Yellow/Citrine variety)

Silicon Dioxide (SiO2)

Quartz (Smoky/Milky Variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Smoky/Milky Variety)

Silicon Dioxide (SiO2)

Quartz Mineral (Silicon dioxide (SiO2)) — mineral

Quartz Mineral

Silicon dioxide (SiO2)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

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

Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Quartz (Milky/Clear variety) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky/Clear variety)

Silicon Dioxide (SiO2)

Likely porphyritic granite or granitic pegmatite fragment (Quartz–feldspar–mica granitoid; exact identification requires testing) — igneous

Likely porphyritic granite or granitic pegmatite fragment

Quartz–feldspar–mica granitoid; exact identification requires testing

Moldavite (Moldavite (Siliceous vitreous substance)) — tektite (natural glass)

Moldavite

Moldavite (Siliceous vitreous substance)

tektite (natural glass)

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

Milky Quartz

Crystalline Silicon Dioxide (SiO2)

Quartz with Iron Staining (Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions) — mineral

Quartz with Iron Staining

Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions

Mica Schist (with Golden/Biotite inclusions) (K(Mg,Fe)3AlSi3O10(F,OH)2 (Biotite), KAl2(AlSi3O10)(F,OH)2 (Muscovite)) — metamorphic

Mica Schist (with Golden/Biotite inclusions)

K(Mg,Fe)3AlSi3O10(F,OH)2 (Biotite), KAl2(AlSi3O10)(F,OH)2 (Muscovite)

Black Obsidian (Volcanic Glass (Amorphous Silicon Dioxide, SiO2)) — igneous

Black Obsidian

Volcanic Glass (Amorphous Silicon Dioxide, SiO2)

Mahogany Obsidian (Volcanic glass (SiO2 with Hematite or Magnetite inclusions)) — igneous

Mahogany Obsidian

Volcanic glass (SiO2 with Hematite or Magnetite inclusions)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Sandstone (Sedimentary Rock (Quartz arenite)) — sedimentary

Sandstone

Sedimentary Rock (Quartz arenite)

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)

Sandstone (Quartz Arenite / Clastic Sedimentary Rock) — sedimentary

Sandstone

Quartz Arenite / Clastic Sedimentary Rock

Quartz Pebble (Silicon Dioxide (SiO2)) — sedimentary

Quartz Pebble

Silicon Dioxide (SiO2)