Rock Identifier

Category

Mineral Like (Natural Glass)

Browse mineral like (natural glass) specimens identified by the Rock Identifier community.

Learn about Mineral Like (Natural Glass) in the encyclopedia

Obsidian

Black Obsidian

Macusanite

Baddeleyite

Green Obsidian

Blue Obsidian

Maskelynite

Midnight Obsidian

Sideromelane

Yellow-Green Obsidian

Yellow-Green Obsidian

Perlite

Pink Obsidian

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

Quartz (Smoky Quartz variant)

Silicon Dioxide (SiO2)

Citrine (Silicon Dioxide (SiO2)) — mineral

Citrine

Silicon Dioxide (SiO2)

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

Smoky Quartz

Smoky Quartz (SiO2: Silicon Dioxide)

Tumbled pale blue-green quartz (likely aquamarine-bearing quartz) (Quartz, SiO₂; blue coloration may reflect inclusions or minor iron-bearing minerals) — mineral

Tumbled pale blue-green quartz (likely aquamarine-bearing quartz)

Quartz, SiO₂; blue coloration may reflect inclusions or minor iron-bearing minerals

Purple Turquoise (Composite Mojave Turquoise) (CuAl6(PO4)4(OH)8·4H2O (Hydrated copper aluminum phosphate composite)) — mineral

Purple Turquoise (Composite Mojave Turquoise)

CuAl6(PO4)4(OH)8·4H2O (Hydrated copper aluminum phosphate composite)

Clear quartz pebble or glass-like quartz specimen (Quartz (silicon dioxide, SiO₂)) — mineral

Clear quartz pebble or glass-like quartz specimen

Quartz (silicon dioxide, SiO₂)

Obsidian (Volcanic Glass) — igneous

Obsidian

Volcanic Glass

Chert (Green Fossilized Algae or Jasper) (Silicon Dioxide (SiO2)) — sedimentary

Chert (Green Fossilized Algae or Jasper)

Silicon Dioxide (SiO2)

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

Green Aventurine

Silicon Dioxide (SiO2) with inclusions of Fuchsite mica

Sea Glass (Amorphous silicon dioxide (man-made glass weathered by nature)) — mineral

Sea Glass

Amorphous silicon dioxide (man-made glass weathered by nature)

Amethyst (Amethyst (variety of Quartz, SiO2)) — mineral

Amethyst

Amethyst (variety of Quartz, SiO2)

Green aventurine (likely) (Quartz, SiO₂, with fuchsite or other green inclusions) — mineral

Green aventurine (likely)

Quartz, SiO₂, with fuchsite or other green inclusions

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

Blue Agate (Dyed Chalcedony) (Silicon Dioxide (SiO2)) — mineral

Blue Agate (Dyed Chalcedony)

Silicon Dioxide (SiO2)

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

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Smoky Quartz (Rough Specimen) (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz (Rough Specimen)

Silicon Dioxide (SiO2)

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

Green Aventurine (Silicon Dioxide (SiO2) with Fuchsite inclusions) — Mineral (variety of Quartz)

Green Aventurine

Silicon Dioxide (SiO2) with Fuchsite inclusions

Mineral (variety of Quartz)

Smoky Quartz (Silicon Dioxide (SiO2) with aluminum impurities) — mineral

Smoky Quartz

Silicon Dioxide (SiO2) with aluminum impurities

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

Smoky Quartz

Quartz (Silicon Dioxide) - SiO2

Yellow Quartz (SiO2 (Silicon Dioxide)) — mineral

Yellow Quartz

SiO2 (Silicon Dioxide)

Amethyst (Faceted) (Quartz (SiO2) with iron impurities) — Mineral

Amethyst (Faceted)

Quartz (SiO2) with iron impurities

Polished amethyst (Quartz, SiO₂; purple variety colored mainly by iron-related defects and irradiation) — mineral

Polished amethyst

Quartz, SiO₂; purple variety colored mainly by iron-related defects and irradiation

Raw Diamond (Rough Uncut) (Diamond (C - pure carbon)) — mineral

Raw Diamond (Rough Uncut)

Diamond (C - pure carbon)

Opalite (Man-made Glass (Synthetic Opalized Glass)) — mineral

Opalite

Man-made Glass (Synthetic Opalized Glass)

Amethyst (Quartz (Silicon Dioxide, SiO2)) — gemstone

Amethyst

Quartz (Silicon Dioxide, SiO2)

Amethyst (Amethyst (Silicon Dioxide, SiO2 + Fe4+)) — mineral

Amethyst

Amethyst (Silicon Dioxide, SiO2 + Fe4+)

Red jasper (likely polished and carved) (Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored mainly by iron oxides) — gemstone

Red jasper (likely polished and carved)

Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored mainly by iron oxides

Green Quartzite (Quartzite (SiO2 with chlorite/epidote inclusions)) — metamorphic

Green Quartzite

Quartzite (SiO2 with chlorite/epidote inclusions)

Pumice (Pumice (volcanic glass)) — igneous

Pumice

Pumice (volcanic glass)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Smoky Quartz (Vein Quartz) (Quartz (Silicon Dioxide, SiO2)) — mineral

Smoky Quartz (Vein Quartz)

Quartz (Silicon Dioxide, SiO2)

Amethyst (Amethyst (Silicon Dioxide with iron impurities), SiO2) — mineral

Amethyst

Amethyst (Silicon Dioxide with iron impurities), SiO2

Clear Quartz Crystal (Likely Golden Healer/Iron-Stained) (Silicon Dioxide (SiO2)) — mineral

Clear Quartz Crystal (Likely Golden Healer/Iron-Stained)

Silicon Dioxide (SiO2)

Tektite (Indochinite) (Tektite (Natural silica glass)) — meteorite

Tektite (Indochinite)

Tektite (Natural silica glass)

Clear Quartz (SiO2 (Silicon Dioxide)) — mineral

Clear Quartz

SiO2 (Silicon Dioxide)

Citrine Quartz (Silicon Dioxide (SiO2)) — mineral

Citrine Quartz

Silicon Dioxide (SiO2)

Red Jasper with Quartz (Silicon Dioxide (SiO2) with Hematite impurities) — sedimentary

Red Jasper with Quartz

Silicon Dioxide (SiO2) with Hematite impurities

Diamond (or Cubic Zirconia) (Carbon (C) or Zirconium Dioxide (ZrO2)) — gemstone

Diamond (or Cubic Zirconia)

Carbon (C) or Zirconium Dioxide (ZrO2)

Obsidian (Blue) (Volcanic Glass (SiO2)) — igneous

Obsidian (Blue)

Volcanic Glass (SiO2)