Quartz Sand Grain / Micro Crystal
Silicon Dioxide (SiO2)
mineral
Category
Not A Rock Or Mineral
Browse not a rock or mineral specimens identified by the Rock Identifier community.
Learn about Not A Rock Or Mineral in the encyclopedia
View all →
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Chert/Chalcedony variety)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Chert / Flint
Cryptocrystalline quartz (SiO2)
Sedimentary
Peridotite
Ultramafic igneous rock
igneous
Granite
Felsic intrusive igneous rock
igneous
Granite
Felsic intrusive igneous rock
igneous
Gneiss (with Quartzite layers)
Gneissic Metamorphic Rock
metamorphic
Sandstone
Arenite (SiO2 primarily)
sedimentary
Vesicular Basalt with Calcification
Vesicular Basalt (Aphanitic extrusive igneous rock)
igneous
Polished brown mineral fragment, likely quartz-rich iron-stained material
Possibly quartz (SiO₂) with iron-oxide inclusions; exact identification is uncertain from the image
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
mineral
Gneiss
Metamorphic rock (Gneiss)
metamorphic
Granite
Intrusive Igneous Rock
igneous
Granite
Intrusive igneous rock
igneous
Quartz on Basalt
Silicon Dioxide (SiO2) on Mafic Igneous Rock
Mineral on Igneous Rock
Granite Cobble
Granite (Phaneritic Igneous Rock)
igneous
Sandstone
Sedimentary Clastic Rock (Quartz Arenite)
sedimentary
Brecciated Quartz
Silicon Dioxide (SiO2) with iron oxide cement
sedimentary
Sandstone
Arenite (SiO2 primarily)
sedimentary
Gneiss
Gneiss (a type of metamorphic rock)
Metamorphic Rock
Sandstone (Quartzose)
Arenite (primarily SiO2)
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Basalt
Basalt (extrusive igneous rock)
Igneous
Sandstone with Quartz Veining
Clastic sedimentary rock (SiO2 dominated)
sedimentary
Thunderegg (Agate or Quartz Geode)
Silica-filled rhyolitic nodule (SiO2)
sedimentary
Granite
Felsic Plutonic Rock
igneous
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) within a metamorphic matrix
metamorphic
Sandstone Pebble (River Rock)
Arenite (primarily SiO2)
sedimentary
Unakite or Epidosite
Epidosite (Mineral composition: Epidote, Feldspar, and Quartz)
metamorphic
Basalt
Mafic Igneous Rock (composed primarily of Pyroxene and Plagioclase Feldspar)
igneous
Diorite (River Cobble)
Intermediate plutonic igneous rock
igneous
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Rhyolite
Extrusive igneous rock (felsic)
igneous
Quartz Vein in Host Rock
Crystalline Silicon Dioxide (SiO2) in Igneous/Metamorphic Matrix
mineral
Black Beach Pebble / Basalt Pebble
Basalt / Mafic Volcanic Rock
igneous
Sandstone
Arenite (primarily SiO2)
sedimentary