Glass / Silicon Dioxide (Man-made)
SiO2 (Amorphous Silicon Dioxide)
Amorphous Solid
Category
Mixed (Predominantly Sedimentary And Igneous)
Browse mixed (predominantly sedimentary and igneous) specimens identified by the Rock Identifier community.
Hypersthene
Hypersthene ((Mg,Fe)SiO3)
mineral
Ruby in Fuchsite
Corundum (Al2O3) in Chrome-Mica (KAl2(AlSi3O10)(OH)2)
metamorphic
Tektite (Indochinite)
Tektite (Amorphous Meteoritic Glass)
igneous
Sandstone
Arenite (SiO2 predominantly)
sedimentary
Rough Gemstone Grains (Mixed Sapphires and Quartz)
Corundum (Al2O3) and Quartz (SiO2)
mineral
Amethyst (Faceted)
Quartz (SiO2) with iron impurities
Mineral
Turquoise
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
mineral
Amethyst (Chevron or Banded Amethyst)
Silicon Dioxide (SiO2) with trace Iron (Fe)
mineral
Amethyst (Pale/Light Variety)
Quartz (Silicon Dioxide) with Iron impurities - SiO2
mineral
Magnetite
Magnetite (Fe3O4)
Mineral
Mahogany Obsidian
Volcanic Glass with Hematite/Magnetite (SiO2 + Fe2O3)
igneous
Folded Schist / Gneiss (Metamorphic Rock)
Regional Metaphoric Folded Outcrop (predominantly Schist/Gneiss)
metamorphic
Amethyst
Amethyst (Silicon Dioxide, SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO₂)
mineral
Moonstone with Black Tourmaline
Orthoclase (KAlSi3O8) with Schorl inclusions
mineral
Banded Gneiss
Gneiss (Metamorphic high-grade, predominantly SiO2, Al2O3, K2O, Na2O)
metamorphic
Banded Agate (Orca Agate)
Silicon Dioxide (SiO2) - Chalcedony variety
mineral
Quartz (Amethyst variety)
Silicon Dioxide (SiO2)
mineral
Citrine
Quartz (Silicon Dioxide - SiO2)
mineral
Granite
Granite (compositionally of Quartz, Alkali Feldspar, and Plagioclase)
igneous
Slag
Ferrous slag (by-product of iron smelting)
Mineraloid / Anthropogenic
Moss Agate
Chalcedony (SiO2) with inclusions of manganese or iron oxide
mineral
Chrysocolla
Hydrated copper silicates (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral
Carnelian
Chalcedony (SiO2) with Iron Oxide impurities
mineral
Dalmation Stone (often called Dalmatian Jasper)
Antiperthite-rich Microgranite
igneous
Red Jasper (possibly Red Coral or dyed Howlite)
Silicon Dioxide (SiO2) with Iron Oxide inclusions
sedimentary
Amethyst
Amethyst (Silicon Dioxide, SiO2)
mineral
Peach Moonstone
Potassium Aluminum Silicate, KAlSi3O8
mineral
Quartz (River Pebble)
Quartz (Silicon Dioxide, SiO2)
mineral
Quartzite (Rounded Pebble)
Quartzite (predominantly SiO2)
metamorphic
Snowflake Obsidian
Obsidian with Cristobalite inclusions (Amorphous SiO2 + SiO2 inclusions)
igneous
Fossil / Permineralized Bone
Tyrannosaurus rex fossil (Hydroxylapatite replaced by various minerals)
sedimentary
Citrine
Silicon Dioxide (SiO2) with iron impurities
mineral
Kambaba Jasper (Crocodile Jasper)
Stromatolitic Rhyolite/Jasper (SiO2)
sedimentary
Himalayan Pink Salt (Halite)
Halite (Sodium Chloride, NaCl)
sedimentary
Labradorite
Labradorite ((Ca, Na)(Al, Si)4O8)
mineral
Citrine Quartz
Silicon Dioxide (SiO2) with iron impurities
mineral
Amethyst
Silicon Dioxide with iron impurities (SiO2)
mineral
Obsidian
Volcanic Glass (predominantly SiO2)
igneous
Obsidian
Volcanic Glass (predominantly SiO2)
igneous
Obsidian
Volcanic Glass (predominantly SiO2)
igneous