Quartz Druzy (on Matrix)
Silicon Dioxide (SiO2)
Category
Browse man made rock (technosol) specimens identified by the Rock Identifier community.
Quartz Druzy (on Matrix)
Silicon Dioxide (SiO2)
Chert Nodules in Limestone
Microcrystalline Quartz (SiO2) within Calcium Carbonate (CaCO3)
Chert Nodules or Concretion
Cryptocrystalline Quartz (SiO2)
Wishing Stone (Basalt/Siltstone with Quartz/Calcite vein)
Carbonaceous Siltstone with Quartz (SiO2) or Calcite (CaCO3) vein
Chert (Flint)
Microcrystalline Quartz (SiO2)
Conglomerate
Polymictic Conglomerate
Druzy Quartz on Sandstone
Silicon Dioxide (SiO2) with Quartz crystals
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
Quartz (White/Milky)
Silicon Dioxide (SiO2)
Sandstone
Sandstone (Siliciclastic Sedimentary Rock)
Sandstone
Arenite (Clastic Sedimentary Rock)
Porphyry (Porphyritic Basalt / Andesite)
Porphyritic Igneous Rock
Sandstone (River Cobble)
Clastic sedimentary rock (primarily SiO2)
River Rock
Silica-rich water-worn rock / Quartzite
Emerald in Matrix
Beryl (Be3Al2Si6O18) with Chromium/Vanadium impurities
Sandstone
Clastic sedimentary rock
Granite
Granite (Felsic Plutonic Rock)
Gneiss
Foliated Metamorphic Rock (Gneiss)
Vesicular Rhyolite
Rhyolite (High-silica volcanic rock)
Black river pebble, likely basalt
Basalt; fine-grained mafic volcanic rock composed mainly of plagioclase and pyroxene, commonly with olivine
Granite
Felsic intrusive igneous rock
Granite Pebble
Intrusive Igneous Rock (composed of quartz, feldspar, and mica)
Ruby in Zoisite
Anyolite (Ruby-Zoisite)
Granite
Felsic intrusive igneous rock
Crushed Granite / Landscaping Gravel
Granitoid
Granite
Phaneritic intrusive igneous rock
Granite
Felsic intrusive igneous rock
Granite
Felsic intrusive igneous rock
Granite
Felsic intrusive igneous rock
Granite
Felsic intrusive igneous rock
Granite
Felsic intrusive igneous rock
Granite
Intrusive Igneous Rock (Felsic)
Granite
Intrusive Igneous Rock (composed of quartz, alkali feldspar, and plagioclase)
Granite
Felsic intrusive igneous rock
Granite
Felsic intrusive igneous rock
Sandstone (Pebble)
Arenite
Serpentine
Antigorite/Lizardite/Chrysotile group, Mg3Si2O5(OH)4
Serpentine
Antigorite/Lizardite (Mg, Fe)3Si2O5(OH)4
Unakite
Unakite (altered granitic rock)
Granodiorite with Biotite Mica
Granodiorite (containing Quartz, Plagioclase Feldspar, and Biotite Mica)
Crazy Lace Agate
Chalcedony (Silicon Dioxide, SiO2)
Sandstone
Sedimentary Rock (Quartz arenite/Arkose)