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

Pink Obsidian

Perlite

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

Quartz (Citrine/Milky variety)

Silicon Dioxide (SiO2)

Sandstone (Arenite (SiO2 primarily)) — sedimentary

Sandstone

Arenite (SiO2 primarily)

Green Quartz (Prasiolite/Adventurine) (Silicon Dioxide with inclusions (SiO2)) — mineral

Green Quartz (Prasiolite/Adventurine)

Silicon Dioxide with inclusions (SiO2)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Opalite (a synthetic glass, often confused with Opal) (Silicon dioxide glass (SiO2nH2O, for natural opal)) — Synthetic (glass)

Opalite (a synthetic glass, often confused with Opal)

Silicon dioxide glass (SiO2nH2O, for natural opal)

Synthetic (glass)

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

Smoky Quartz

Smoky Quartz (Silicon Dioxide - SiO2)

Strawberry Quartz (Silicon Dioxide with Hematite inclusions (SiO2 + Fe2O3)) — mineral

Strawberry Quartz

Silicon Dioxide with Hematite inclusions (SiO2 + Fe2O3)

Amethyst (with Pyrite and other minerals) (Silicon Dioxide (SiO2)) — mineral

Amethyst (with Pyrite and other minerals)

Silicon Dioxide (SiO2)

Yellow Quartz (Citrine or Yellow Chalcedony) (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz (Citrine or Yellow Chalcedony)

Silicon Dioxide (SiO2)

Sandstone (Ferruginous) (Arenite (with Iron Oxide)) — sedimentary

Sandstone (Ferruginous)

Arenite (with Iron Oxide)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Yellow Quartz (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz

Silicon Dioxide (SiO2)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Opalite (Man-made opalized glass) — mineral

Opalite

Man-made opalized glass

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

Smoky Quartz

Crystalline Silicon Dioxide (SiO2)

Blue Agate (Dyed or Treated Chalcedony) (Silicon Dioxide (SiO2), microcrystalline quartz variety) — mineral

Blue Agate (Dyed or Treated Chalcedony)

Silicon Dioxide (SiO2), microcrystalline quartz variety

Citrine Quartz (Silicon Dioxide (SiO2)) — mineral

Citrine Quartz

Silicon Dioxide (SiO2)

Quartz Pebble (Silicon Dioxide (SiO2)) — mineral

Quartz Pebble

Silicon Dioxide (SiO2)

Banded Slag Glass (Leland Blue/Frankfort Green style) (Anthropogenic Glass Specimen (Amorphous Silicon Dioxide with impurities)) — mineral

Banded Slag Glass (Leland Blue/Frankfort Green style)

Anthropogenic Glass Specimen (Amorphous Silicon Dioxide with impurities)

Citrine (Citrine (Silicon Dioxide, SiO2)) — mineral

Citrine

Citrine (Silicon Dioxide, SiO2)

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

Amethyst

Amethyst (Silicon Dioxide - SiO2 with iron impurities)

Blue goldstone beads (Man-made aventurine glass (silica glass with metallic copper inclusions), not natural lapis lazuli) — mineral

Blue goldstone beads

Man-made aventurine glass (silica glass with metallic copper inclusions), not natural lapis lazuli

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

Opalite

Man-made Glass (Synthetic Opalized Glass)

Slag Glass (Cullet) (Amorphous Silica / Glass residue) — Man-made byproduct (Non-geological)

Slag Glass (Cullet)

Amorphous Silica / Glass residue

Man-made byproduct (Non-geological)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

Tektite (Indochinite) (Tektite (Natural Glass, SiO2 + Al2O3)) — mineral

Tektite (Indochinite)

Tektite (Natural Glass, SiO2 + Al2O3)

Blue Slag Glass (Ferro-silicate glass (Slag)) — igneous (man-made/industrial)

Blue Slag Glass

Ferro-silicate glass (Slag)

igneous (man-made/industrial)

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

Green Aventurine

SiO2 (Silicon Dioxide) with Fuchsite inclusions

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

Clear Quartz (Tumbled)

Quartz (Silicon Dioxide - SiO2)

Green Quartz (likely Aventurine or Prasiolite) (Silicon Dioxide (SiO2) with inclusions) — mineral

Green Quartz (likely Aventurine or Prasiolite)

Silicon Dioxide (SiO2) with inclusions

Luminous Stone (Glow-in-the-dark Synthetic/Man-made Stone) (Strontium Aluminate tinted glass or resin (Crystalline silicate/oxide mix)) — mineral (synthetic)

Luminous Stone (Glow-in-the-dark Synthetic/Man-made Stone)

Strontium Aluminate tinted glass or resin (Crystalline silicate/oxide mix)

mineral (synthetic)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite

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

Smoky Quartz

Silicon Dioxide (SiO2) with aluminum impurities

Yellow Chert (Yellow Jasper) (Silicon dioxide (SiO2)) — sedimentary

Yellow Chert (Yellow Jasper)

Silicon dioxide (SiO2)

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

Tumbled Amethyst

Silicon Dioxide (SiO2) with iron impurities

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

Green Aventurine

Aventurine Quartz (SiO2 with Fuchsite inclusions)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Sandstone (Arenite (SiO2 principal)) — sedimentary

Sandstone

Arenite (SiO2 principal)

Blue Sapphire (Corundum (Al2O3 with trace Titanium and Iron)) — mineral

Blue Sapphire

Corundum (Al2O3 with trace Titanium and Iron)

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

Clear Quartz (Rock Crystal)

Silicon Dioxide (SiO2)

Citrine Quartz (Silicon Dioxide (SiO₂) with iron impurities) — mineral

Citrine Quartz

Silicon Dioxide (SiO₂) with iron impurities

Smoky Quartz (Faceted Beads) (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz (Faceted Beads)

Silicon Dioxide (SiO2)