Rock Identifier

Category

Mineral Like (Natural Glass)

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

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

Raw Diamond (Rough Uncut)

Diamond (C - pure carbon)

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

Amethyst

Amethyst (variety of Quartz, SiO2)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Obsidian (Volcanic Glass (Amorphous SiO2)) — igneous

Obsidian

Volcanic Glass (Amorphous SiO2)

Citrine Quartz (Crystalline Quartz (SiO2 with iron impurities)) — mineral

Citrine Quartz

Crystalline Quartz (SiO2 with iron impurities)

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

Smoky Quartz (Vein Quartz)

Quartz (Silicon Dioxide, SiO2)

Sandstone (Arenite/Quartz Arenite) — sedimentary

Sandstone

Arenite/Quartz Arenite

Quartz (Engineered Quartz Surface) (Silicon Dioxide (SiO2) based composite) — mineral (man-made composite)

Quartz (Engineered Quartz Surface)

Silicon Dioxide (SiO2) based composite

mineral (man-made composite)

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

Amethyst (Faceted)

Quartz (SiO2) with iron impurities

Slag Glass (Vitreous Silicate Residue) — industrial byproduct (anthropogenic rock)

Slag Glass

Vitreous Silicate Residue

industrial byproduct (anthropogenic rock)

Citrine Quartz (Silicon Dioxide (SiO2)) — mineral

Citrine Quartz

Silicon Dioxide (SiO2)

Green Aventurine (Silicon Dioxide with Fuchsite inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)) — metamorphic

Green Aventurine

Silicon Dioxide with Fuchsite inclusions (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)

Quartz (Silicon Dioxide (SiO2)) — mineral

Quartz

Silicon Dioxide (SiO2)

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

Green Aventurine

Aventurine Quartz (SiO2 with Fuchsite inclusions)

Peach Aventurine (Silicon Dioxide (SiO2) with Hematite/Goethite inclusions) — mineral

Peach Aventurine

Silicon Dioxide (SiO2) with Hematite/Goethite inclusions

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

Amethyst

Silicon Dioxide (SiO2) with iron impurities

Yellow Quartz (Citrine-colored Quartz) (Silicon Dioxide (SiO2)) — mineral

Yellow Quartz (Citrine-colored Quartz)

Silicon Dioxide (SiO2)

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

Green Aventurine

Aventurine Quartz (SiO2 with Fuchsite inclusions)

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

Diamond (or Cubic Zirconia)

Carbon (C) / Cubic Zirconium Dioxide (ZrO2)

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Chalcanthite (Likely Synthetic/Lab-Grown) (Hydrated copper(II) sulfate (CuSO4·5H2O)) — mineral

Chalcanthite (Likely Synthetic/Lab-Grown)

Hydrated copper(II) sulfate (CuSO4·5H2O)

Cullet Glass (Industrial Slag Glass) (Amorphous Silica (SiO2) with metallic oxide impurities) — Man-made byproduct (often mistaken for Obsidian or Emerald)

Cullet Glass (Industrial Slag Glass)

Amorphous Silica (SiO2) with metallic oxide impurities

Man-made byproduct (often mistaken for Obsidian or Emerald)

Banded Agate (Dyed Purple) (Agate (Variety of Chalcedony/Quartz), SiO2) — mineral

Banded Agate (Dyed Purple)

Agate (Variety of Chalcedony/Quartz), SiO2

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

Yellow Quartz Pebble (Citrine or Iron-Stained Quartz)

Silicon Dioxide (SiO2)

Citrine (likely Heat-Treated Amethyst) (Silicon Dioxide (SiO2)) — mineral

Citrine (likely Heat-Treated Amethyst)

Silicon Dioxide (SiO2)

Blue Aventurine (Silicon Dioxide (SiO2) containing Dumortierite or Crocidolite inclusions) — mineral

Blue Aventurine

Silicon Dioxide (SiO2) containing Dumortierite or Crocidolite inclusions

Smoky Quartz (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz

Silicon Dioxide (SiO2)

Green Slag Glass (Amorphous Silica / Glassy Blast Furnace Slag) — Mineraloid (Industrial byproduct)

Green Slag Glass

Amorphous Silica / Glassy Blast Furnace Slag

Mineraloid (Industrial byproduct)

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

Yellow Quartz (Citrine Quartz Pebble)

Silicon Dioxide (SiO2)

Crackle Agate / Dyed Agate (Agate (Silicon dioxide / SiO2)) — mineral

Crackle Agate / Dyed Agate

Agate (Silicon dioxide / SiO2)

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

Yellow Quartz (Citrine Quartz)

Silicon Dioxide (SiO2)

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

Green Aventurine

Silicon dioxide (SiO2) with inclusions of Fuchsite mica

Sandstone (Arenite (SiO2 based)) — sedimentary

Sandstone

Arenite (SiO2 based)

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

Smoky Quartz

Smoky Quartz (Silicon Dioxide - SiO2)

Smoky Quartz with Feldspar (Quartz (SiO2) with Potassium Feldspar (KAlSi3O8)) — mineral

Smoky Quartz with Feldspar

Quartz (SiO2) with Potassium Feldspar (KAlSi3O8)

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

Quartz (Smoky Quartz variant)

Silicon Dioxide (SiO2)

Smoky Quartz on Feldspar (Granite Pegmatite) (Silicon Dioxide (SiO2) with Potassium Aluminum Silicate (KAlSi3O8)) — igneous

Smoky Quartz on Feldspar (Granite Pegmatite)

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

Quartz (specifically Citrine or Iron-stained Quartz) (Silicon Dioxide (SiO2)) — mineral

Quartz (specifically Citrine or Iron-stained Quartz)

Silicon Dioxide (SiO2)

Citrine (Silicon dioxide (SiO2)) — mineral

Citrine

Silicon dioxide (SiO2)

Sandstone (Arenite (SiO2 primarily)) — sedimentary

Sandstone

Arenite (SiO2 primarily)

Sandstone (Arenite (primarily SiO2)) — sedimentary

Sandstone

Arenite (primarily SiO2)

Sandstone (Arenite) — sedimentary

Sandstone

Arenite