Heat-Treated Amethyst (Citrine Geode)
Silicon Dioxide (SiO2) with iron impurities
mineral
Category
Not A Natural Rock (Man Made Composite)
Browse not a natural rock (man made composite) specimens identified by the Rock Identifier community.
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Sandstone
Sedimentary Rock (Quartz arenite)
sedimentary
Agate
Silicon dioxide (Chalcedony), SiO2
sedimentary
Hag Stone
Naturally holed stone (typically sedimentary rock such as flint, limestone, or sandstone)
Sedimentary
Basalt River Stone
Basalt (extrusive igneous rock)
igneous
Chert
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Quartz Variety)
Chert (Silicon Dioxide, SiO2)
sedimentary
Fulgarite
Fulgurite (Lechatelierite / Vitrified Sand)
igneous
Diorite
Diorite (Intermediate intrusive igneous rock)
igneous
Granite
Granite (Phaneritic Quartz-Feldspar intrusive rock)
Igneous
Sandstone
Arenite
sedimentary
Dragon Vein Agate (Dyed)
SiO2
mineral
Sandstone
Arenite (Siliclastic sedimentary rock)
sedimentary
Desert Rose (Baryte or Gypsum Rose)
Baryte (BaSO4) or Gypsum (CaSO4·2H2O)
mineral
Blue Sea Glass
Amorphous Silica (Anthropogenic glass)
not a rock (man-made origin)
Sandstone
Arenite (SiO2 based)
sedimentary
Conglomerate
Conglomerate (Detrital Sedimentary Rock)
sedimentary
Sandstone
Sandstone (SiO2 dominated)
sedimentary
Sandstone
Quartz Arenite / Clastic Sedimentary Rock
sedimentary
Sandstone
Arenite (composed primarily of Quartz, SiO2)
sedimentary
Banded Sandstone (Beach Pebble)
Quartz Arenite Sandstone
sedimentary
Amethyst
Silicon Dioxide (SiO2)
mineral
Coal (Anthracite / Bituminous)
Organic Sedimentary Rock (Carbon-based)
sedimentary
Sandstone (Stream-rounded)
Arenite (SiO2 based)
sedimentary
Sandstone Pebble
Sedimentary Rock (Quartz Arenite)
sedimentary
Sandstone
Clastic Sedimentary Rock
sedimentary
Sandstone with Quartz Sphere
Arenite (SiO2-rich sedimentary rock) with Quartzite/Rose Quartz sphere
sedimentary
Granodiorite
Granodiorite (Quartz + Plagioclase + Alkali Feldspar + Biotite/Hornblende)
igneous
Sandstone
Arenite (SiO2 principal component)
sedimentary
Granite Pebble
Intrusive Igneous Rock
igneous
Granite
Granite (Felsic Plutonic Rock)
igneous
Shale with Iron Staining
Fissile Mudrock (Sedimentary Rock)
sedimentary
Sandstone
Arenite (Siliclastic sedimentary rock)
sedimentary
Pink Dyed Agate Geode Slice
Silicon Dioxide (SiO2) with artificial pigment
mineral
Generic Rock Fragment
Rock Fragment
sedimentary
Sandstone
Arenite
sedimentary
Sandstone
Arenite (SiO2 dominant)
sedimentary
Shale
Sedimentary pelitic rock
sedimentary
Sandstone (Quartzose Sandstone)
Arenite (SiO2 based)
sedimentary
Sandstone
Arenite
sedimentary
Silicon Carbide (Carborundum)
Silicon Carbide, SiC
mineral
Sandstone
Arenite (SiO2 based)
sedimentary