Amethyst
Quartz (Silicon Dioxide, SiO2)
gemstone
Category
Mineral (Synthetic Paper And Ink Polymorph)
Browse mineral (synthetic paper and ink polymorph) specimens identified by the Rock Identifier community.
Learn about Mineral (Synthetic Paper And Ink Polymorph) in the encyclopedia
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Yellow Chalcedony / Carnelian
Silicon Dioxide (SiO2)
mineral
Raw Citrine Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Rose Quartz / Quartz Pebble)
Silicon Dioxide (SiO2)
mineral
Emerald in Quartz Matrix
Beryl (Be3Al2Si6O18) with trace Chromium/Vanadium
gemstone
Citrine
Silicon Dioxide (SiO2)
gemstone
Citrine Quartz
Silicon Dioxide (SiO2)
mineral
Emerald in Matrix
Beryl (Be3Al2Si6O18)
mineral
Mixed Mineral and Fossil Collection
Multi-specimen assemblage (SiO2, CaCO3, FeS2, etc.)
mineral
Planet Earth
Gaia (Silicate Terrestrial Planet)
metamorphic
Citrine
Crystalline Quartz (SiO2) with iron impurities
mineral
Jasper or Agate
Silicon dioxide (SiO2)
Mineral
Selenite
Gypsum (CaSO4·2H2O)
mineral
Satin Spar Gypsum (Satin Spar Selenite)
Hydrous calcium sulfate (CaSO4%2H2O)
mineral
Satin Spar Gypsum (Satin Spar Selenite)
Hydrous calcium sulfate (CaSO4%C2%A02H2O)
mineral
Pyrite (Fools Gold)
Iron Disulfide (FeS2)
mineral
Limonite Boxwork / Iron Ore Concretion
FeO(OH)qnH2O (Hydrated iron oxide)
sedimentary
Satin Spar Selenite
Gypsum (CaSO4·2H2O)
mineral
Pyrite in Quartz
FeS2 (Iron Pyrite) with SiO2 (Quartz)
Mineral/Igneous/Hydrothermal
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Granite
Intrusive Igneous Rock
igneous
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Goethite / Limonite Gossan
Goethite, FeO(OH)
mineral
Bloodstone
Heliotrope (Chalcedony)
mineral
White Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Obsidian
Volcanic Glass (Amorphous silicon dioxide with impurities)
igneous
Potassium Feldspar (Orthoclase)
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Dark volcanic sand / basaltic sand
Basalt-derived lithic sand, chiefly plagioclase, pyroxene, and volcanic glass
igneous
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Blue Apatite
Apatite (Ca5(PO4)3(F,Cl,OH))
mineral
Quartz (Tumbled)
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Orthoclase Feldspar (Granitic)
KAlSi3O8 (Potassium Feldspar)
igneous
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Blue Apatite
Calcium Fluorophosphate - Ca5(PO4)3F
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Moss-covered)
Silicon Dioxide (SiO2)
mineral
Granite
Felsic intrusive igneous rock
igneous