Opalite (Man-made Glass)
Synthetic Silicon Dioxide Glass (SiO2 + metal oxides)
Synthetic Mineral Simulant / Glass
Category
Carved Stone
Browse carved stone specimens identified by the Rock Identifier community.
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Jasper
Silicon Dioxide (Microcrystalline Quartz, SiO2)
sedimentary
Granite
Granite (Felsic Plutonic Rock)
Igneous
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Granite
Intrusive Felsic Igneous Rock
igneous
Prehnite
Ca2Al(AlSi3O10)(OH)2
mineral
Blue Aventurine
Quartz (SiO2) with inclusions
mineral
Tiger's Eye
SiO2 (Silicon Dioxide with inclusions of Goethite/Limonite)
Metamorphic
Diorite (Salt and Pepper Rock)
Diorite
igneous
Sandstone
Arenite
sedimentary
Likely botryoidal malachite or chrysocolla specimen
Malachite, Cu₂CO₃(OH)₂; possibly chrysocolla, hydrated copper silicate
mineral
Kambaba Jasper
Stromatolite
sedimentary/fossil
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Pink Quartz (Inclusion-rich Quartzite)
SiO2 (Silicon Dioxide) with Iron Oxide / Hematite inclusions
metamorphic
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Green Aventurine
Quartz (Silicon Dioxide) with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)
mineral
Fancy Jasper (Bloodstone variety)
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Orthoceras fossil in limestone
Orthoceras regulare (extinct nautiloid cephalopod)
fossil
Rose Quartz
Silicon dioxide (SiO2)
mineral
Rough Green QuartzITE / Green Aventurine
Aventurine Quartz (SiO2 + Cr-muscovite inclusions)
metamorphic
Red Sandstone
Arenite (with Iron Oxide / Hematite cementation)
sedimentary
Carnelian Agate
Silicon Dioxide (SiO2) - Variety of Chalcedony
mineral
Granite
Phaneritic Felsic Igneous Rock (primarily SiO2, Al2O3, K2O, Na2O)
igneous
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Granite
Phaneritic Felsic Igneous Rock
igneous
Granite
Granite (Mainly Quartz, Alkali Feldspar, and Plagioclase)
igneous
Yellow Jasper
Silicon Dioxide (SiO2) with iron hydroxides (Goethite or Limonite)
sedimentary
Pink Granite
Phaneritic Plutonic Felsic Igneous Rock (Granite)
igneous
Soapstone
Steatite (Hydrated magnesium silicate)
metamorphic
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Granite
Granite (Phaneritic intrusive igneous rock)
igneous
Granite
Phaneritic Igneous Rock (composed primarily of Quartz, Alkali Feldspar, and Plagioclase)
igneous
Granite
Phaneritic Felsic Igneous Rock
igneous
Granite
Phaneritic Felsic Igneous Rock (composed primarily of Quartz, Feldspar, and Mica)
igneous
Granite
Granite (Felsic Plutonic Rock)
igneous
Red Sandstone
Arenite (high iron oxide content)
sedimentary
Red Sandstone
Arenite (with Iron Oxide pigmentation)
Sedimentary
Mahogany Obsidian
Obsidian (Volcanic Glass with Hematite inclusions)
igneous
Granite
Phaneritic Felsic Igneous Rock (Granite)
igneous
Unakite
Granitic Unakite (Alteration rock composed of pink orthoclase feldspar, green epidote, and clear quartz)
metamorphic
Leopardite
Quartz porphyry / Quartz monzonite with manganese oxide spots
igneous