Rock Identifier

Category

Synthetic (Man Made Glass)

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

Learn about Synthetic (Man Made Glass) in the encyclopedia

Opalite

Goldstone

Zincite

Yttrium Aluminum Garnet

Yttrium Aluminum Garnet

Blue Goldstone

Sideromelane

Lead Feldspar

Black Obsidian

Maskelynite

Obsidian

Tachylite

Map Jasper

Silicon (Silicon (Si)) — mineral

Silicon

Silicon (Si)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Obsidian (likely blue-sheen or coated obsidian) (Volcanic glass; primarily rhyolitic silica glass (SiO₂-rich, noncrystalline)) — igneous

Obsidian (likely blue-sheen or coated obsidian)

Volcanic glass; primarily rhyolitic silica glass (SiO₂-rich, noncrystalline)

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

Quartz (Smoky/Milky variety)

Silicon Dioxide (SiO2)

Snowflake Obsidian (Vitreous Silica with Spherulite inclusions (Amorphous SiO2)) — igneous

Snowflake Obsidian

Vitreous Silica with Spherulite inclusions (Amorphous SiO2)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Chert (Flint Nodules) (Microcrystalline quartz (SiO2)) — sedimentary

Chert (Flint Nodules)

Microcrystalline quartz (SiO2)

Tumbled gray-green pebble, likely chert or altered volcanic rock (Cryptocrystalline quartz (chert), possibly silicified volcanic material) — sedimentary

Tumbled gray-green pebble, likely chert or altered volcanic rock

Cryptocrystalline quartz (chert), possibly silicified volcanic material

Weathered porphyritic volcanic rock (Likely porphyritic andesite or dacite, with plagioclase phenocrysts in a fine-grained volcanic groundmass) — igneous

Weathered porphyritic volcanic rock

Likely porphyritic andesite or dacite, with plagioclase phenocrysts in a fine-grained volcanic groundmass

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

Chert (Chert Nodule)

Silicon Dioxide (SiO₂)

Quartzite (Crystalline silica (SiO2)) — metamorphic

Quartzite

Crystalline silica (SiO2)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Likely weathered quartz-rich stone (Probably quartz-bearing sandstone or milky quartz; exact identification requires testing) — mineral

Likely weathered quartz-rich stone

Probably quartz-bearing sandstone or milky quartz; exact identification requires testing

Pumice (Pumice (Volcanic Glass Foam)) — igneous

Pumice

Pumice (Volcanic Glass Foam)

Gold Sheen Obsidian (Volcanic Glass (SiO2 with inclusions)) — igneous

Gold Sheen Obsidian

Volcanic Glass (SiO2 with inclusions)

Snowflake Obsidian (Spherulitic Volcanic Glass (SiO2)) — igneous

Snowflake Obsidian

Spherulitic Volcanic Glass (SiO2)

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

Gold Sheen Obsidian

Volcanic Glass (SiO2 + impurities)

Pumice (Pumice (Amorphous volcanic glass)) — igneous

Pumice

Pumice (Amorphous volcanic glass)

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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

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

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

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

Green Aventurine

Quartz (SiO2) with fuchsite inclusions

Quartzite Pebble (Quartzite (SiO2)) — metamorphic

Quartzite Pebble

Quartzite (SiO2)

Aventurine (Silicon dioxide (Quartz) with inclusions (KAl2(AlSi3O10)(OH)2)) — mineral

Aventurine

Silicon dioxide (Quartz) with inclusions (KAl2(AlSi3O10)(OH)2)

Quartzite Pebble (Quartzite (SiO2)) — metamorphic

Quartzite Pebble

Quartzite (SiO2)

Aventurine (Aventurine Quartz (SiO2 + Fuschite inclusions)) — metamorphic

Aventurine

Aventurine Quartz (SiO2 + Fuschite inclusions)

Quartzite pebble (Quartzite (SiO2 based)) — metamorphic

Quartzite pebble

Quartzite (SiO2 based)

Green Aventurine (Silicon Dioxide (SiO2) with Fuchsite inclusions) — metamorphic

Green Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

Quartzite Pebble (Quartzite (mostly SiO2)) — metamorphic

Quartzite Pebble

Quartzite (mostly SiO2)

Chert (Flint Nodules) (Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Flint Nodules)

Cryptocrystalline Quartz (SiO2)

Quartzite (Quartz sand or Chert) (Quartzite (SiO2)) — metamorphic

Quartzite (Quartz sand or Chert)

Quartzite (SiO2)

Pumice (Pumice (Vesicular Rhyolite/Andesite)) — igneous

Pumice

Pumice (Vesicular Rhyolite/Andesite)

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

Green Aventurine

Aventurine Quartz (SiO2 with Fuchsite inclusions)

Quartzite with Quartz Veining (Quartzite (primarily SiO2)) — metamorphic

Quartzite with Quartz Veining

Quartzite (primarily SiO2)

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

Quartzite (River Pebble)

Quartzite (primarily SiO2)

Educational Geologic Collection (Mixed Mineral and Rock Collection (Various compositions)) — mineral

Educational Geologic Collection

Mixed Mineral and Rock Collection (Various compositions)

Quartzite (Gold/Tan River Cobble) (Quartzite (composed primarily of crystalline SiO2)) — metamorphic

Quartzite (Gold/Tan River Cobble)

Quartzite (composed primarily of crystalline SiO2)

Pumice (Pumice) — igneous

Pumice

Pumice

Pumice (Vesicular Felsic Extrusive Igneous Rock) — igneous

Pumice

Vesicular Felsic Extrusive Igneous Rock

Red Tuff / Sandstone (Rhyolitic Tuff / Pyroclastic Volcanic Rock) — igneous

Red Tuff / Sandstone

Rhyolitic Tuff / Pyroclastic Volcanic Rock

Fulgurite (Fulgurite (Lechatelierite)) — metamorphic

Fulgurite

Fulgurite (Lechatelierite)

Snowflake Obsidian (Spherulitic Obsidian (Volcanic glass containing Cristobalite)) — igneous

Snowflake Obsidian

Spherulitic Obsidian (Volcanic glass containing Cristobalite)

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

Pumice

Pumice (a highly vesicular extrusive volcanic glass)