Rock Identifier

Category

Glass

Browse glass specimens identified by the Rock Identifier community.

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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

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

Yellow Quartz (Citrine or Iron-Stained Quartz)

Silicon Dioxide (SiO2)

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

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

mineral
Iron Slag (Anthropogenic Iron oxide/Silicate composite) — Mineral-like byproduct (Technogenic)

Iron Slag

Anthropogenic Iron oxide/Silicate composite

Mineral-like byproduct (Technogenic)
Pumice (Pumice (a highly vesicular volcanic rock)) — igneous

Pumice

Pumice (a highly vesicular volcanic rock)

igneous
Quartz (Milky or Smoky Quartz) (Silicon Dioxide (SiO2)) — mineral

Quartz (Milky or Smoky Quartz)

Silicon Dioxide (SiO2)

mineral
Opalite (Synthetic Fluorescent Glass (SiO2 + impurities)) — mineraloid (synthetic)

Opalite

Synthetic Fluorescent Glass (SiO2 + impurities)

mineraloid (synthetic)
Quartz (Clear / Rock Crystal) (Silicon Dioxide (SiO2)) — mineral

Quartz (Clear / Rock Crystal)

Silicon Dioxide (SiO2)

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

Milky Quartz

Silicon Dioxide (SiO2)

mineral
Milky Quartz with Iron Inclusions (Crystalline Silicon Dioxide (SiO2)) — mineral

Milky Quartz with Iron Inclusions

Crystalline Silicon Dioxide (SiO2)

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

Milky Quartz

Silicon Dioxide (SiO2)

mineral
Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Chert

Microcrystalline Quartz (SiO2)

sedimentary
Quartzite Pebble (Quartzite (SiO2)) — metamorphic

Quartzite Pebble

Quartzite (SiO2)

metamorphic
Basalt (Pahoehoe texture) (Mafic Volcanic Rock) — igneous

Basalt (Pahoehoe texture)

Mafic Volcanic Rock

igneous
Chert Pebble (Chert (SiO2)) — sedimentary

Chert Pebble

Chert (SiO2)

sedimentary
Rough Rose Quartz (Quartz (Silica - SiO2)) — mineral

Rough Rose Quartz

Quartz (Silica - SiO2)

mineral
Chert (Microcrystalline Quartz (SiO2)) — sedimentary

Chert

Microcrystalline Quartz (SiO2)

sedimentary
Quartz (Orthoquartzite) (Silicon Dioxide (SiO2)) — sedimentary

Quartz (Orthoquartzite)

Silicon Dioxide (SiO2)

sedimentary
Amber (Succinate (Fossilized Tree Resin)) — fossil

Amber

Succinate (Fossilized Tree Resin)

fossil
Yellow Aventurine (Quartzite with Muscovite/Goethite inclusions (SiO2)) — metamorphic

Yellow Aventurine

Quartzite with Muscovite/Goethite inclusions (SiO2)

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

Cloudy Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

mineral
Quartzite River Rock (Quartzite (primarily SiO2)) — metamorphic

Quartzite River Rock

Quartzite (primarily SiO2)

metamorphic
Chert (with Limestone matrix) (Silicon dioxide (SiO2)) — sedimentary

Chert (with Limestone matrix)

Silicon dioxide (SiO2)

sedimentary
Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

mineral
Chert / Jasper (Silicon Dioxide (SiO2)) — sedimentary

Chert / Jasper

Silicon Dioxide (SiO2)

sedimentary
Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

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

Milky Quartz

Silicon Dioxide (SiO2)

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

Chert (Flint)

Silicon Dioxide (SiO2)

sedimentary
Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

mineral
Chert (Jasper) (Microcrystalline Quartz (SiO2)) — sedimentary

Chert (Jasper)

Microcrystalline Quartz (SiO2)

sedimentary
Quartzite pebble (Metamorphic rock (mainly SiO2)) — metamorphic

Quartzite pebble

Metamorphic rock (mainly SiO2)

metamorphic
Chert (Flint) (Chert (SiO2)) — sedimentary

Chert (Flint)

Chert (SiO2)

sedimentary
Quartz Mineral (Silicon Dioxide (SiO2)) — mineral

Quartz Mineral

Silicon Dioxide (SiO2)

mineral
Chert Pebble (Chert (Silicon Dioxide, SiO2)) — sedimentary

Chert Pebble

Chert (Silicon Dioxide, SiO2)

sedimentary
Yellow Aventurine (specifically a carved crescent moon) (Silicon Dioxide (SiO2) with inclusions) — mineral

Yellow Aventurine (specifically a carved crescent moon)

Silicon Dioxide (SiO2) with inclusions

mineral
Quartz and Mixed Gravel (Silicon Dioxide (SiO2) with minor impurities) — Mineral

Quartz and Mixed Gravel

Silicon Dioxide (SiO2) with minor impurities

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

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

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

Quartz Pebble

Silicon Dioxide (SiO2)

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

Milky Quartz

Silicon Dioxide (SiO2)

mineral
Quartz (Sunstone-like Chalcedony) (Silicon Dioxide (SiO2)) — mineral

Quartz (Sunstone-like Chalcedony)

Silicon Dioxide (SiO2)

mineral
Quartz Pebble (Quartz (Silicon Dioxide, SiO2)) — Mineral

Quartz Pebble

Quartz (Silicon Dioxide, SiO2)

Mineral
Orange Quartzite / Quartz (Silicon Dioxide (SiO2) with iron oxide inclusions) — metamorphic

Orange Quartzite / Quartz

Silicon Dioxide (SiO2) with iron oxide inclusions

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

Chert (Flint)

Microcrystalline Quartz (SiO2)

sedimentary