Amethyst Geode
Quartz (Silicon Dioxide, SiO2) with iron impurities
mineral
Category
Mineral (Synthetic Paper And Ink Polymorph)
Browse mineral (synthetic paper and ink polymorph) specimens identified by the Rock Identifier community.
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Amethyst
Silicon Dioxide (SiO2) with iron impurities
gemstone
Red Calcite
Calcium Carbonate (CaCO3)
mineral
Limonite
FeO(OH)·n(H2O)
mineral
Chalcopyrite in Gossan
Chalcopyrite (CuFeS2) in a Limonite-rich Gossan matrix
mineral
Larimar
Blue Pectolite (NaCa2Si3O8(OH))
mineral
Granite
Intrusive Igneous Rock
igneous
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
K-Feldspar (Potassium Feldspar)
Potassium Feldspar (KAlSi3O8)
mineral
Mica (Muscovite or Biotite)
Sheet silicate mineral group (e.g., KAl2(AlSi3O10)(F,OH)2)
mineral
Granite
Felsic intrusive igneous rock
igneous
Quartz Mineral
Silicon Dioxide (SiO2)
mineral
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Chalcopyrite
Copper Iron Sulfide (CuFeS2)
mineral
Satin Spar Selenite
Gypsum (CaSO4·2H2O)
mineral
Seashell (Calcium Carbonate)
Calcium Carbonate (CaCO3)
mineral
Chrysocolla Cuprite
Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (Chrysocolla) and Cu2O (Cuprite)
mineral composite
Galena
Lead Sulfide (PbS)
mineral
Howlite
Ca2B5SiO9(OH)5
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Feldspar (Plagioclase / Potassium Feldspar)
Feldspar Group (KAlSi3O8 - NaAlSi3O8 - CaAl2Si2O8)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Muscovite Mica
KAl2(AlSi3O10)(OH)2
mineral
Fuchsite
K(Al,Cr)2(AlSi3O10)(OH)2
mineral
Chalcopyrite (Peacock Ore)
Chalcopyrite (CuFeS2)
mineral
Granite
Felsic intrusive igneous rock
igneous
Black Beach Pebble / Basalt Pebble
Basalt / Mafic Volcanic Rock
igneous
Potassium Feldspar (Orthoclase / Microcline)
KAlSi3O8
mineral
Clear Quartz (Rock Crystal) Bracelet
Silicon Dioxide (SiO2)
gemstone
Satin Spar (Selenite variant)
Gypsum (Calcium Sulfate Dihydrate, CaSO4·2H2O)
mineral
Granodiorite
Granodiorite
Igneous
Healer's Gold (Iron-Stained Quartz Cluster)
Silicon Dioxide with Iron Oxide Coating (SiO2)
mineral
Quartz (Chalcedony/Agate nodule)
Silicon dioxide (SiO2)
mineral
Amazonite
Microcline feldspar (KAlSi3O8)
mineral
Quartz Geode
Silicon dioxide (SiO2)
sedimentary
Lake Superior Agate
SiO2 (Quartz variety chalcedony)
gemstone
Quartz Vein Rock with Feldspar
Silicon Dioxide (SiO2) with Potassium Feldspar
mineral
Blue Quartz
Silicon Dioxide (SiO2) with inclusions
mineral
Yellow Quartz
Silicon Dioxide (SiO2)
mineral
Yellow Quartz
Silicon Dioxide (SiO2)
mineral
Geode
Quartz / Chalcedony nodule with mineralized cavity
sedimentary
Quartz (Iron-Stained / Ferruginous Quartz)
Silicon Dioxide (SiO2)
mineral