Rock Identifier

Category

Glass

Browse glass specimens identified by the Rock Identifier community.

Learn about Glass in the encyclopedia

Sideromelane

Sideromelane

Black Obsidian

Black Obsidian

Maskelynite

Maskelynite

Obsidian

Obsidian

Tachylite

Tachylite

Hyalite Opal

Hyalite Opal

Macusanite

Macusanite

Perlite

Perlite

Opalite

Opalite

Pink Obsidian

Pink Obsidian

Goldstone

Goldstone

Palagonite

Palagonite

Rose Quartz (or Quartzite) (Silicon Dioxide (SiO2)) — mineral

Rose Quartz (or Quartzite)

Silicon Dioxide (SiO2)

Mahogany Obsidian (Volcanic Glass with Hematite or Magnetite inclusions (SiO2 + Fe2O3)) — igneous

Mahogany Obsidian

Volcanic Glass with Hematite or Magnetite inclusions (SiO2 + Fe2O3)

Obsidian (Volcanic Glass (Primary composition: SiO2 - Silicon Dioxide)) — igneous

Obsidian

Volcanic Glass (Primary composition: SiO2 - Silicon Dioxide)

Green Quartzite (Meta-quartzite with Fuchsite inclusions (K(Al,Cr)2(AlSi3O10)(OH)2 + SiO2)) — metamorphic

Green Quartzite

Meta-quartzite with Fuchsite inclusions (K(Al,Cr)2(AlSi3O10)(OH)2 + SiO2)

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

Chert (Flint)

Chert (Microcrystalline Quartz, SiO2)

Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Chert

Microcrystalline Quartz (SiO2)

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

Milky Quartz (Quartz Vein)

Silicon Dioxide (SiO2)

Anthracite Coal (Anthracite (C)) — sedimentary

Anthracite Coal

Anthracite (C)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Green Quartzite (with Hematite inclusions) (Metamorphic Quartz (SiO2) with various inclusions) — metamorphic

Green Quartzite (with Hematite inclusions)

Metamorphic Quartz (SiO2) with various inclusions

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Quartzite (Quartzite (composed primarily of Quartz, SiO2)) — metamorphic

Quartzite

Quartzite (composed primarily of Quartz, SiO2)

Mixed Mineral Collection (Multi-mineral Assemblage (Quartz, Jasper, Obsidian, Pyrite, etc.)) — mineral

Mixed Mineral Collection

Multi-mineral Assemblage (Quartz, Jasper, Obsidian, Pyrite, etc.)

Chert Nodule (Microcrystalline Quartz (SiO2)) — sedimentary

Chert Nodule

Microcrystalline Quartz (SiO2)

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

Green Aventurine

Aventurine Quartz (SiO2 with Fuchsite inclusions)

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

Green Aventurine

Aventurine Quartz (SiO2 with Fuchsite inclusions)

Quartzite (likely Iron-stained) (SiO2 (Metamorphosed Sandstone)) — metamorphic

Quartzite (likely Iron-stained)

SiO2 (Metamorphosed Sandstone)

Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Limestone

Calcium Carbonate (CaCO3)

Aventurine Quartz (Silicon Dioxide (SiO2) with Fuchsite inclusions) — gemstone

Aventurine Quartz

Silicon Dioxide (SiO2) with Fuchsite inclusions

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

Green Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite

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

Green Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

Quartzite Pebble (Quartzite (primarily SiO2)) — metamorphic

Quartzite Pebble

Quartzite (primarily SiO2)

Quartzite Cobble (Quartzite (primarily SiO2)) — metamorphic

Quartzite Cobble

Quartzite (primarily SiO2)

Quartzite (Quartzite (composed primarily of Silicon Dioxide, SiO2)) — metamorphic

Quartzite

Quartzite (composed primarily of Silicon Dioxide, SiO2)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

Chert (Yellow Jasper variant) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Yellow Jasper variant)

Microcrystalline Quartz (SiO2)

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

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

Green Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite mica

River Stone (Quartzite) (Quartzite (SiO2)) — metamorphic

River Stone (Quartzite)

Quartzite (SiO2)

Green Aventurine (Aventurine Quartz (SiO2 + Fuchsite mica)) — metamorphic

Green Aventurine

Aventurine Quartz (SiO2 + Fuchsite mica)

Quartzite Cobble (Quartzite (chemically SiO2)) — metamorphic

Quartzite Cobble

Quartzite (chemically SiO2)

Quartzite (Quartzite (primarily SiO2)) — metamorphic

Quartzite

Quartzite (primarily SiO2)

Green Aventurine (Aventurine (Quartz variety), SiO2) — metamorphic

Green Aventurine

Aventurine (Quartz variety), SiO2

Green Aventurine (Silicon Dioxide (Quartz) with inclusions of Fuchsite mica (K(Al,Cr)2(AlSi3O10)(OH)2)) — metamorphic

Green Aventurine

Silicon Dioxide (Quartz) with inclusions of Fuchsite mica (K(Al,Cr)2(AlSi3O10)(OH)2)

Yellow Chert (Chert / Cryptocrystalline Quartz) (Silicon Dioxide (SiO2)) — sedimentary

Yellow Chert (Chert / Cryptocrystalline Quartz)

Silicon Dioxide (SiO2)

Chert (Jasper-rich) (Microcrystalline/Cryptocrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper-rich)

Microcrystalline/Cryptocrystalline Quartz (SiO2)

Quartzite with Quartz Veining (Metamorphosed Sandstone (SiO2 with impurities)) — metamorphic

Quartzite with Quartz Veining

Metamorphosed Sandstone (SiO2 with impurities)

Chert (specifically Flint) (Chert (SiO2)) — sedimentary

Chert (specifically Flint)

Chert (SiO2)

Quartzite (Metamorphosed Quartz Sandstone (SiO2)) — metamorphic

Quartzite

Metamorphosed Quartz Sandstone (SiO2)

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

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

Green Aventurine

Aventurine Quartz (SiO2 with Fuchsite inclusions)