Amethyst
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.
Learn about Mineral (Synthetic Paper And Ink Polymorph) in the encyclopedia
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Quartz (Gravel Pebble)
Silicon Dioxide (SiO2)
mineral
Magnetite (in matrix)
Magnetite (Fe3O4)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz (Agate/Chalcedony)
Silicon Dioxide (SiO2)
mineral
Desert Varnish on Sandstone
Quartz Arenite with Iron-Manganese Oxide Coating
sedimentary
Yellow Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Smoky/Milky)
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Druzy)
Silicon Dioxide (SiO2)
mineral
Mica Schist
Mica Schist (Composition: Muscovite, Biotite, Quartz, Feldspar)
metamorphic
Quartz (Rose Quartz)
Silicon Dioxide (SiO2)
mineral
Amethyst
Quartz (Silicon Dioxide, SiO2)
mineral
Tumbled Yellow Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Gold
Native Gold (Au)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Tiger's Eye
Silicon Dioxide with Crocidolite inclusions (SiO2)
mineral
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) vein cutting through host rock
mineral
Herkimer Diamond
Quartz (Silicon Dioxide, SiO2)
mineral
Amazonite
Microcline Feldspar (KAlSi3O8)
mineral
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Sea Glass
Man-made silicate glass (Amorphous silicon dioxide)
mineral
Citrine Geode
Silicon Dioxide (Quartz variety, often heat-treated amethyst): SiO2
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Turquoise
CuAl6(PO4)4(OH)8·4H2O
mineral
Amazonite
Microcline feldspar (KAlSi3O8)
mineral
Green Aventurine
Quartz variety with fuchsite inclusions (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Green Aventurine
Quartz (Silicon Dioxide, SiO2) with fuchsite inclusions
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Gold Nugget
Gold (Au)
mineral
Quartz Crystal
Silicon Dioxide (SiO2)
mineral
Amethyst
Quartz (Silicon Dioxide, SiO2)
mineral
Inukshuk Rock Sculpture (composed of Granite, Slate, and Amethyst)
Silicon Dioxide (Amethyst portion, SiO2) with mixed silicate rock assemblage
mineral