Milky Quartz
Silicon Dioxide (SiO2)
mineral
Category
Biogenic Material
Browse biogenic material specimens identified by the Rock Identifier community.
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Milky Quartz with Mica inclusions
Quartz (Silicon Dioxide, SiO2)
mineral
Crushed Stone / Gravel
Aggregatus saxum (variable mineral composition)
sedimentary
Red Sandstone
Ferruginous Sandstone
sedimentary
Sandstone
Arenite (SiO2 principal composition)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartzite Chert Pebble
Microcrystalline Silicon Dioxide (SiO2)
sedimentary/metamorphic
Orange Quartzite / Quartz
Silicon Dioxide (SiO2) with iron oxide inclusions
metamorphic
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Sandstone (Quartzose)
Arenite (SiO2 based)
sedimentary
Nuummite
Orthoamphibole (Anthophyllite-Gedrite composition)
metamorphic
Limestone River Pebble
Sedimentary Calcium Carbonate (CaCO3)
sedimentary
Stromatolite (Jasper-replaced)
Fossilized Stromatolite (Cyanobacteria / Cryptozon / Silica SiO2)
sedimentary
Amber
Succinite (Fossilized Tree Resin)
mineraloid
Sandstone (Quartz-rich)
Arenite (Quartz Arenite)
sedimentary
Sandstone (with Iron Staining)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Quartzite River Rock
Metamorphosed Quartz-rich Sandstone (SiO2)
metamorphic
Fire Opal (in matrix)
Hydrated Silica (SiO2·nH2O)
Mineraloid
Milky and Ferruginous Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Sand Gravel
Silicon Dioxide (SiO2)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Limestone
Calcareous sedimentary rock (CaCO3)
sedimentary
Olivine (Peridotite)
Magnesium iron silicate (Mg, Fe)2SiO4
igneous
Sandstone
Sandstone (Sedimentary rock composed of silicate grains)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Granite
Phaneritic plutonic rock (Quartz + Feldspar + Mica)
igneous
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Sandstone
Arenite (SiO2 based)
sedimentary
Granite Pebble
Granite (High-silica plutonic rock)
igneous
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone
Clastic sedimentary rock (primarily SiO2)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Granitic Pebble (Glacial Erratic)
Granite
igneous
Sandstone (Ferruginous)
Arenite with Iron Oxides
sedimentary
Nephrite Jade
Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)
metamorphic
White Quartz Cobble
Quartz (Silicon Dioxide, SiO2)
mineral
Sandstone
Arenite (SiO2 based)
sedimentary
Sandstone (Quartz-rich)
Arenite
sedimentary
Sandstone (with potential iron-oxide weathering)
Arenite (SiO2 based)
sedimentary
Red Sandstone
Arenic rock (composed mainly of SiO2 with Fe2O3)
sedimentary
Tumbled blue sodalite
Sodalite, Na₈(Al₆Si₆O₂₄)Cl₂
mineral
Tumbled blue stone, likely sodalite
Sodalite, Na₈(Al₆Si₆O₂₄)Cl₂; possibly blue calcite or dyed material
mineral