Quartz (Grain)
Silicon Dioxide (SiO2)
mineral
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
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Turquoise
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
mineral
Diamond (or Cubic Zirconia)
Carbon (C) or Zirconium Dioxide (ZrO2)
gemstone
Quartz
Silicon Dioxide (SiO2)
mineral
River Jasper (Green Jasper)
Silicon Dioxide (SiO2) with impurities
sedimentary
Limonite
FeO(OH)·n(H2O)
mineral
Cubic Zirconia
Zirconium dioxide (ZrO2)
gemstone
Pearl
Calcium Carbonate (Aragonite/Calcite) with Conchiolin, CaCO3
gemstone
Granite Pebble (River Rock)
Granite
igneous
Green Aventurine
Silicon Dioxide (Quartz) with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)
metamorphic
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
metamorphic
Green Aventurine
Silicon Dioxide (SiO2) with Fuchsite inclusions
metamorphic
Green Aventurine
Aventurine Quartz (SiO2 + Fuchsite mica)
metamorphic
Green Aventurine
Aventurine Quartz (SiO2 with Fuchsite inclusions)
metamorphic
Bornite (Peacock Ore) / Acid-treated Chalcopyrite
Bornite (Cu5FeS4) or Chalcopyrite (CuFeS2)
mineral
Diamond
Natural Diamond (Carbon, C)
gemstone
Yellow Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Snowflake Obsidian
Spherulitic Obsidian (Amorphous volcanic glass with Phenocrysts of Cristobalite)
igneous
Iron-stained Quartz
Silicon Dioxide (SiO2) with iron oxide inclusions
mineral
Shale with Limonite/Hematite Staining
Argillaceous sedimentary rock with Iron Oxides (FeO(OH)·nH2O / Fe2O3)
sedimentary
Quartz (Clear Quartz)
Silicon Dioxide (SiO2)
mineral
Chert (Jasper/Flint variety)
Silicon dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Tumbled Clear Quartz/Rock Crystal
Silicon Dioxide (SiO2)
mineral
Citrine Quartz
Silicon Dioxide (SiO2)
mineral
Amethyst Gemstone
Crystalline Quartz (SiO2 with iron impurities)
gemstone
Mixed pebble collection, including likely flint, quartzite, and fossil material
Varied silicate rocks; visible specimen may include chert (microcrystalline SiO₂), quartzite, and a possible fossil
sedimentary
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Iron-Stained)
Crystalline Silicon Dioxide (SiO2)
mineral
Quartz (Milky or Smoky variant)
Silicon Dioxide (SiO2)
mineral
Blue Quartz (specifically Dumortierite Quartz)
SiO2 (Silicon Dioxide) with inclusions of AlAl6BSi3O18 (Dumortierite)
mineral
Potassium Feldspar (Orthoclase)
Orthoclase (KAlSi3O8)
mineral
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Quartz / Clear Quartz
Silicon Dioxide (SiO2)
mineral
Diamond
Native Carbon (C)
gemstone
Diamond (Cut Gemstone)
Carbon (C)
gemstone
Amber (and Citrine Quartz)
Succinite (Amber) and Silicon Dioxide (SiO2)
Organic Mineraloid and Mineral
Turquoise (likely Sleeping Beauty variety or treated Howlite imitation)
Hydrated phosphate of copper and aluminium, CuAl6(PO4)4(OH)8·4H2O
mineral
Carnelian Agate
Silicon Dioxide (SiO2)
gemstone
Orthoclase Feldspar
Potassium aluminum silicate (KAlSi3O8)
mineral
Rainbow Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Limonite (with Goethite/Hematite glaze)
Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)
mineral