Quartz River Pebbles
Silicon Dioxide (SiO2)
sedimentary
Category
Mineral, Specifically A Detrital Grain
Browse mineral, specifically a detrital grain specimens identified by the Rock Identifier community.
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Sandstone
Sandstone (Quartzose/Feldspathic Sandstone)
sedimentary
Greenstone
Greenschist / Greenstone (contains epidote, chlorite, and actinolite)
metamorphic
Gneiss
Gneiss
metamorphic
Quartz Grain
Silicon Dioxide (SiO2)
mineral
Marble
Recrystallized Calcite (CaCO3) Rock
metamorphic
Pink Granite
Phaneritic Felsic Igneous Rock
igneous
Basalt with Quartz Veins
Mafic Igneous Rock with Quartz (SiO2) intrusions
igneous
Chalcedony (specifically Agate or Carnelian variety)
Cryptocrystalline Silica (SiO2)
mineral
Granite Pegmatite
Phaneritic Plutonic Igneous Rock
igneous
Biotite (Black Mica)
Biotite - K(Mg,Fe)3(AlSi3O10)(F,OH)2
mineral
Tumbled Moonstone
Feldspar (Orthoclase/Albite), KAlSi3O8
mineral
Satin Spar (Satin Spar Selenite)
Gypsum (CaSO4·2H2O)
mineral
Granite (Pink/Potassium Feldspar Granite)
Felsic Plutonic Rock (Potassium Feldspar, Quartz, Mica, and Amphibole)
igneous
Pink Granite
Phaneritic Felsic Igneous Rock (composed primarily of K-Feldspar, Quartz, and Plagioclase)
igneous
Pink Granite
Phaneritic Felsic Igneous Rock
igneous
Sandstone (Ferruginous)
Ferruginous Sandstone (SiO2 with Fe2O3)
sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
Mineral
Basalt
Basalt (composition of plagioclase feldspar and pyroxene)
Igneous
Native Gold (Placer Gold)
Native Gold (Au)
mineral
White Marble
Calcite-rich Metasomatized Carbonate (CaCO3)
metamorphic
Mahogany Obsidian Arrowhead
Volcanic Glass with Hematite/Magnetite inclusions (Amorphous Silicon Dioxide)
igneous
Larimar
NaCa2Si3O8(OH)
gemstone
Kidney Stone
Nephrolithiasis (Calcium Oxalate, Hydroxyapatite, or Uric Acid)
mineral
Sodalite with Syenite (Yooperlite)
Sodalite in Syenite (Na8(Al6Si6O24)Cl2)
mineral
Orthoclase Feldspar (or K-Feldspar)
Orthoclase (KAlSi3O8)
Mineral
Sandstone (specifically Lithic or Quartz Arenite)
Arenite (composed primarily of SiO2)
sedimentary
Chalcedony (specifically Agate or Carnelian pebble)
Chalcedony (Microcrystalline Quartz, SiO2)
mineral
Aventurine (specifically Green Aventurine)
Silicon Dioxide (Quartz) with inclusions of Fuchsite; SiO2 + K(Al,Cr)2AlSi3O10(OH)2
metamorphic
Sandstone (specifically Arkose or Ferruginous Sandstone)
Sandstone (SiO2 predominant)
sedimentary
Quartz (specifically Clear and Rose Quartz)
Silicon Dioxide (SiO2)
mineral
Chrysotile Asbestos
Mg3Si2O5(OH)4
mineral
Basalt with Epidote Veining
Basalt (Mafic Extrusive Rock) with Ca2(Al,Fe)3(SiO4)3(OH)
igneous
Gneiss (specifically Granite Gneiss)
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Citrine (tumbled)
Silicon dioxide, SiO2
mineral
Pink Granite
Phaneritic Felsic Igneous Rock (Granite)
igneous
Pink Granite
Phaneritic intrusive igneous rock (high Orthoclase Feldspar content)
igneous
Pink Granite
Phaneritic Felsic Igneous Rock (composed primarily of K-Feldspar, Quartz, and Plagioclase)
igneous
Pink Granite
Granite (Phaneritic intrusive rock rich in K-feldspar)
igneous
Pink Granite (with Potassic Feldspar and Quartz)
Felsic Intrusive Igneous Rock (Granite)
igneous
Pink Granite
Phaneritic Felsic Igneous Rock (Granite)
igneous