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

Polished/tumbled jasper, likely ocean jasper or brecciated jasper (Jasper: microcrystalline quartz (SiO₂) with iron oxides and other silicate impurities) — mineral

Polished/tumbled jasper, likely ocean jasper or brecciated jasper

Jasper: microcrystalline quartz (SiO₂) with iron oxides and other silicate impurities

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

Amethyst

Silicon dioxide (SiO2) with iron impurities

Quartzite (Quartzite (SiO2)) — metamorphic

Quartzite

Quartzite (SiO2)

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

Sandstone (likely Ferruginous)

Arenite with Iron Oxide cement

Limonite (Iron Ore) (Limonite (mixed iron hydroxides, primarily FeO(OH)·nH2O)) — mineral

Limonite (Iron Ore)

Limonite (mixed iron hydroxides, primarily FeO(OH)·nH2O)

Sandstone (Arenite (SiO2-rich)) — sedimentary

Sandstone

Arenite (SiO2-rich)

Sandstone (Calcareous or Ferruginous) (Clastic sedimentary rock (SiO2 with CaCO3 or Fe2O3 cement)) — sedimentary

Sandstone (Calcareous or Ferruginous)

Clastic sedimentary rock (SiO2 with CaCO3 or Fe2O3 cement)

Blue Banded Agate (Dyed) (Silicon Dioxide (SiO2) - Chalcedony variety) — mineral

Blue Banded Agate (Dyed)

Silicon Dioxide (SiO2) - Chalcedony variety

Sandstone (likely Quartzose Sandstone) (Clastic Sedimentary Rock (primarily SiO2)) — sedimentary

Sandstone (likely Quartzose Sandstone)

Clastic Sedimentary Rock (primarily SiO2)

Diamond (or synthetic simulant) (Cubic C (Carbon)) — mineral

Diamond (or synthetic simulant)

Cubic C (Carbon)

Diamond (Carbon (C)) — mineral

Diamond

Carbon (C)

Costume Jewelry with Synthetic Gemstones (Synthetic Cubic Zirconia and Glass (SiO2 / ZrO2)) — mineral

Costume Jewelry with Synthetic Gemstones

Synthetic Cubic Zirconia and Glass (SiO2 / ZrO2)

Tumbled blue stone, likely blue aventurine or dyed quartz (Quartz (SiO₂), possibly with fuchsite inclusions; exact identification requires testing) — mineral

Tumbled blue stone, likely blue aventurine or dyed quartz

Quartz (SiO₂), possibly with fuchsite inclusions; exact identification requires testing

Rough White Zircon (Zircon (Zirconium Silicate, ZrSiO4)) — mineral

Rough White Zircon

Zircon (Zirconium Silicate, ZrSiO4)

Diamond (in Jewelry Setting) (Carbon (C) - Isometric-Hexoctahedral) — mineral

Diamond (in Jewelry Setting)

Carbon (C) - Isometric-Hexoctahedral

Quartz (Citrine / Golden Quartz) (Silicon Dioxide (SiO2)) — mineral

Quartz (Citrine / Golden Quartz)

Silicon Dioxide (SiO2)

Citrine Quartz (Quartz (SiO2) - specifically, a variety of macrocrystalline quartz) — Mineral

Citrine Quartz

Quartz (SiO2) - specifically, a variety of macrocrystalline quartz

White Topaz (Topaz - Al2SiO4(F,OH)2) — mineral

White Topaz

Topaz - Al2SiO4(F,OH)2

Crushed Limestone (Calcium Carbonate (CaCO3)) — sedimentary

Crushed Limestone

Calcium Carbonate (CaCO3)

Bornite (Peacock Ore) (Bornite (Cu5FeS4)) — mineral

Bornite (Peacock Ore)

Bornite (Cu5FeS4)

Tumbled Stone Collection (featuring Tiger's Eye, Rose Quartz, and Moss Agate) (Mixed Silicates and Oxides (predominantly SiO2 group minerals)) — mineral

Tumbled Stone Collection (featuring Tiger's Eye, Rose Quartz, and Moss Agate)

Mixed Silicates and Oxides (predominantly SiO2 group minerals)

Smoky Quartz Geode Slice (Silicon Dioxide (SiO2)) — mineral

Smoky Quartz Geode Slice

Silicon Dioxide (SiO2)

Tumbled quartz pebble (Quartz (silicon dioxide, SiO₂)) — mineral

Tumbled quartz pebble

Quartz (silicon dioxide, SiO₂)

Aura Quartz (Anomalously Coated Quartz) (Silicon Dioxide (SiO2) treated with vaporized metals) — mineral

Aura Quartz (Anomalously Coated Quartz)

Silicon Dioxide (SiO2) treated with vaporized metals

Rough Diamond (Diamond (Native Carbon, C)) — mineral

Rough Diamond

Diamond (Native Carbon, C)

Kaolinite (Chalky Clay) (Kaolinite (Al2Si2O5(OH)4)) — sedimentary

Kaolinite (Chalky Clay)

Kaolinite (Al2Si2O5(OH)4)

Rough Diamond / Clear Quartz (C (Carbon) or SiO2 (Silicon Dioxide)) — mineral

Rough Diamond / Clear Quartz

C (Carbon) or SiO2 (Silicon Dioxide)

Quartz (Smoky Quartz with inclusions) (Silicon Dioxide (SiO2)) — mineral

Quartz (Smoky Quartz with inclusions)

Silicon Dioxide (SiO2)

Fairy Stone (Staurolite Cross) (Staurolite (Fe2Al9O6(SiO4)4(O,OH)2)) — mineral

Fairy Stone (Staurolite Cross)

Staurolite (Fe2Al9O6(SiO4)4(O,OH)2)

Ferruginous Slag (Iron Smelting Byproduct) (Anthropogenic Vitreous Silicate (often containing Fayalite: Fe2SiO4)) — Mineraloid/Anthropogenic (Technofossil)

Ferruginous Slag (Iron Smelting Byproduct)

Anthropogenic Vitreous Silicate (often containing Fayalite: Fe2SiO4)

Mineraloid/Anthropogenic (Technofossil)

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

Citrine Quartz

Silicon Dioxide (SiO2) with iron impurities

Polished blue-banded agate slice (Agate (microcrystalline quartz, SiO₂; chiefly chalcedony)) — mineral

Polished blue-banded agate slice

Agate (microcrystalline quartz, SiO₂; chiefly chalcedony)

Chert (Flint variety) (Chert (Cryptocrystalline Quartz, SiO2)) — sedimentary

Chert (Flint variety)

Chert (Cryptocrystalline Quartz, SiO2)

Peacock Ore (Bornite (Cu5FeS4) or Acid-Treated Chalcopyrite (CuFeS2)) — mineral

Peacock Ore

Bornite (Cu5FeS4) or Acid-Treated Chalcopyrite (CuFeS2)

Tumbled pink quartz (probable rose quartz) (Quartz, silicon dioxide (SiO₂), likely rose quartz) — mineral

Tumbled pink quartz (probable rose quartz)

Quartz, silicon dioxide (SiO₂), likely rose quartz

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

Quartz (Citrine variety)

Silicon Dioxide (SiO2)

Fossil tooth, possibly shark tooth (Indeterminate fossilized vertebrate tooth; likely a shark tooth (possibly *Carcharhinus* or related genus)) — fossil

Fossil tooth, possibly shark tooth

Indeterminate fossilized vertebrate tooth; likely a shark tooth (possibly *Carcharhinus* or related genus)

Amethyst (Variety of Quartz) (Silicon Dioxide (SiO2) with iron impurities) — mineral

Amethyst (Variety of Quartz)

Silicon Dioxide (SiO2) with iron impurities

Red Tiger's Eye (Silicified Crocidolite (SiO2 with iron oxide inclusions)) — mineral

Red Tiger's Eye

Silicified Crocidolite (SiO2 with iron oxide inclusions)

Rough Diamond (Diamond (pure Carbon, C)) — mineral

Rough Diamond

Diamond (pure Carbon, C)

Diamond (Natural Carbon (C)) — mineral

Diamond

Natural Carbon (C)

Milky quartz (Quartz (silicon dioxide, SiO₂)) — mineral

Milky quartz

Quartz (silicon dioxide, SiO₂)