Rock Identifier

Category

Synthetic (Glass)

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

Learn about Synthetic (Glass) in the encyclopedia

Opalite

Yttrium Aluminum Garnet

Yttrium Aluminum Garnet

Zincite

Sideromelane

Lead Feldspar

Black Obsidian

Maskelynite

Obsidian

Tachylite

Hyalite Opal

Perlite

Macusanite

Chert (Flint) River Pebble (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Flint) River Pebble

Microcrystalline Quartz (SiO2)

Chert or Chalcedony (Microcrystalline Quartz (SiO2)) — sedimentary

Chert or Chalcedony

Microcrystalline Quartz (SiO2)

Chert / Flint (Silicon dioxide (SiO2)) — sedimentary

Chert / Flint

Silicon dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Quartz / Quartzite (Silicon Dioxide (SiO2)) — minerals

Quartz / Quartzite

Silicon Dioxide (SiO2)

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

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Quartz with Mica inclusions (likely Iron-stained) (Silicon Dioxide (SiO2) with Phyllosilicates) — mineral

Quartz with Mica inclusions (likely Iron-stained)

Silicon Dioxide (SiO2) with Phyllosilicates

Green Sea Glass (Amorphous Silica (man-made glass), SiO2 + additive metal oxides) — mineraloid / anthropogenic (man-made origin)

Green Sea Glass

Amorphous Silica (man-made glass), SiO2 + additive metal oxides

mineraloid / anthropogenic (man-made origin)

Rounded pebble, likely quartz-rich sandstone or chert (Indeterminate lithic clast; possibly quartz arenite or microcrystalline quartz (SiO₂)) — sedimentary

Rounded pebble, likely quartz-rich sandstone or chert

Indeterminate lithic clast; possibly quartz arenite or microcrystalline quartz (SiO₂)

Muscovite Mica (Granitic Pegmatite) (Muscovite - KAl2(AlSi3O10)(OH)2) — igneous

Muscovite Mica (Granitic Pegmatite)

Muscovite - KAl2(AlSi3O10)(OH)2

Slag (Industrial Glass Slag) (Amorphous Silica / Ferro-silicate Slag) — mineraloid / anthropogenic

Slag (Industrial Glass Slag)

Amorphous Silica / Ferro-silicate Slag

mineraloid / anthropogenic

Clear Quartz (Silicon dioxide (SiO2)) — mineral

Clear Quartz

Silicon dioxide (SiO2)

Obsidian (Obsidian (volcanic glass; primarily SiO2)) — igneous

Obsidian

Obsidian (volcanic glass; primarily SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Quartz with Orthoclase Feldspar (Silicon Dioxide (SiO2) with Potassium Aluminum Silicate (KAlSi3O8)) — mineral

Quartz with Orthoclase Feldspar

Silicon Dioxide (SiO2) with Potassium Aluminum Silicate (KAlSi3O8)

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

Quartz / Milky Quartz

Silicon Dioxide (SiO2)

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

Pumice

Pumice (Vesicular Felsic Igneous Rock)

Milky Quartz (Silicon Dioxide (SiO2)) — mineral

Milky Quartz

Silicon Dioxide (SiO2)

Mixed river-worn rock and mineral collection (Mostly quartz/quartzite, feldspar-bearing granitoid, chert, and mafic volcanic rocks; exact species vary by pebble) — igneous, sedimentary, metamorphic, mineral

Mixed river-worn rock and mineral collection

Mostly quartz/quartzite, feldspar-bearing granitoid, chert, and mafic volcanic rocks; exact species vary by pebble

igneous, sedimentary, metamorphic, mineral

Muscovite (Mica) in Quartz Matrix (Muscovite (KAl2(AlSi3O10)(OH)2) and Quartz (SiO2)) — mineral

Muscovite (Mica) in Quartz Matrix

Muscovite (KAl2(AlSi3O10)(OH)2) and Quartz (SiO2)

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

Clear Quartz

Quartz (Silicon Dioxide, SiO2)

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

Flint or Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Flint or Chert

Microcrystalline Quartz (SiO2)

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

Clear Quartz (Tumbled)

Silicon Dioxide (SiO2)

Clear Quartz (Silicon Dioxide (SiO2)) — mineral

Clear Quartz

Silicon Dioxide (SiO2)

Snowflake Obsidian (Volcanic Glass (felsic volcanic glass with cristobalite inclusions)) — igneous

Snowflake Obsidian

Volcanic Glass (felsic volcanic glass with cristobalite inclusions)

Snowflake Obsidian (Volcanic glass containing Spherulite inclusions (primarily Cristobalite, SiO2)) — igneous

Snowflake Obsidian

Volcanic glass containing Spherulite inclusions (primarily Cristobalite, SiO2)

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

Quartz (Milky/Clear)

Silicon Dioxide (SiO2)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Pumice (Pumice) — igneous

Pumice

Pumice

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Mixed Tumbled Quartz and Chlorite Quartz (Silicon Dioxide (SiO2) with inclusions) — mineral

Mixed Tumbled Quartz and Chlorite Quartz

Silicon Dioxide (SiO2) with inclusions

Milky Quartz Pebble with Matrix (Quartz (SiO2)) — mineral

Milky Quartz Pebble with Matrix

Quartz (SiO2)

Quartz (Clear or Smoky) (Silicon Dioxide (SiO2)) — mineral

Quartz (Clear or Smoky)

Silicon Dioxide (SiO2)

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

Quartz (Milky/Common)

Silicon Dioxide (SiO2)

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

Quartz / Common Opal

Silicon Dioxide (SiO2)

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

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Quartz (Smoky Quartz variant) (Silicon Dioxide (SiO2)) — mineral

Quartz (Smoky Quartz variant)

Silicon Dioxide (SiO2)

Chert (Jasper variety) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Jasper variety)

Silicon Dioxide (SiO2)

Chert (often called Flint) (Microcrystalline quartz (SiO2)) — sedimentary

Chert (often called Flint)

Microcrystalline quartz (SiO2)

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

Clear Quartz

Quartz (Silicon Dioxide, SiO2)