Quartz Geode
Silicon Dioxide (SiO2)
Mineral / Sedimentary
Category
Mineral Like Biological Tissue
Browse mineral like biological tissue specimens identified by the Rock Identifier community.
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Greenstone / Greenschist
Chlorite schist / Epidiorite / Metabasalt
metamorphic
Greenstone
Metabasalt / Chlorite-Epidote Schist
metamorphic
Rose Quartz
Silicon dioxide (SiO2)
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Turquoise
Hydrated copper and aluminum phosphate (CuAl6(PO4)4(OH)8·4H2O)
mineral
Granite Pegmatite
Pegmatite (Quartz, Feldspar, Mica)
igneous
Sandstone Cobble
Clastic Sedimentary (Sandstone)
sedimentary
Sandstone
Arenite (clastic sedimentary rock)
sedimentary
Specular Hematite
Iron(III) oxide (Fe2O3)
mineral
Moss Agate
Silicon Dioxide (SiO2) with Chlorite/Hornblende inclusions
mineral
Amygdaloidal Basalt with Epidote
Amygdaloidal Basalt (Ca2(Al,Fe)3(SiO4)3(OH))
igneous
Sandstone
Arenite (primary component SiO2)
sedimentary
Petrified Wood
Silicified wood (primarily SiO2)
sedimentary
Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Limonite (Iron Ore)
FeO(OH)·nH2O
mineral
Mica Schist with Quartz
Mica Schist (primarily Muscovite or Biotite sheet silicates)
metamorphic
Sandstone (Quartz-rich)
Arenite
sedimentary
Vesicular Basalt
Vesicular Basalt
igneous
Carved Sea Turtle Figurine (Aventurine / Quartz / Jasper)
Quartz variety (SiO2) / Polycrystalline Quartz Aggregate
mineral
Chert (Green and Black Jasper variant)
Cryptocrystalline Quartz (SiO2)
sedimentary
Chalcedony (Agate/Carnelian-like)
Silicon Dioxide (SiO2)
mineral
Turquenite (Dyed Howlite)
Dyed Ca2B5SiO9(OH)5 (Calcium Borosilicate Hydroxide)
mineral
Dendritic Agate
Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions
mineral
Schist
Mica Schist
metamorphic
Sunstone (Feldspar variety)
Oligoclase or Andesine (Na,Ca)(Al,Si)4O8
mineral
Quartz River Cobble
Silicon Dioxide (SiO2)
mineral
Milky Quartz Pebble (Iron-Stained)
Silicon Dioxide (SiO2)
mineral
Sapphire
Corundum (Al2O3)
mineral
Moss Agate with Quartz Druzy
Chalcedony with inclusions (SiO2)
mineral
Blue Sapphire
Corundum (Al2O3) with traces of Iron and Titanium
mineral
Chrysocolla
Hydrated copper silicate (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral
Dendritic Jasper
SiO2 (Microcrystalline Quartz)
mineral
Petoskey Stone
Hexagonaria percarinata
fossil
Gneiss
Metamorphic Foliated Gneiss
metamorphic
Petrified Wood
Silicified Wood (SiO2)
sedimentary
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
metamorphic
Chert (specifically Green Chert/Jasper)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Indigo Gabbro
Gabbro (MaFIC intrusive rock)
igneous
Black Obsidian
Obsidian (Volcanic Glass), primarily SiO2 (Silicon Dioxide)
igneous
Limonite (Iron Ore)
Limonite (Hydrated Iron Oxide, FeO(OH)·nH2O)
Mineral
Quartz with Iron Oxide
Silicon Dioxide (SiO2) with Fe2O3 inclusions
mineral