Quartz Pebble
Silicon Dioxide (SiO2)
Mineral
Category
Quartz
Browse quartz specimens identified by the Rock Identifier community.
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Amazonite
K(AlSi3O8) - Microcline variant
mineral
Quartzite Breccia
Brecciated Quartzite (SiO2)
metamorphic
Graphic Granite
Pegmatitic Quartz-Feldspar Granite
igneous
Smoky Quartz
Silicon Dioxide (SiO2) with aluminum impurities and natural radiation
mineral
Smoky Quartz
Smoky Quartz (SiO2: Silicon Dioxide)
mineral
White Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Gravel fragment)
Quartz (Silicon Dioxide, SiO2)
mineral
Yellow Quartz (Chalcedony or Agate)
Silicon Dioxide (SiO2)
mineral
Limonite-stained Quartz
Silicon Dioxide (SiO2) with Iron Oxide/Hydroxide (FeO(OH)·nH2O) staining
mineral
Quartz (Water-worn Pebble)
Silicon Dioxide (SiO2)
mineral
Yellow Quartz (Citrine or Yellow Chalcedony)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Geode
Silicon Dioxide (SiO2) within a secondary sedimentary structure
sedimentary
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Green Quartzite (River Stone)
Metamorphic Quartz (SiO2) with inclusions (typically Fuchsite or Chlorite)
metamorphic
Sandstone
Arenite (SiO2 primarily)
sedimentary
Tiger's Eye
Pseudomorph of quartz after crocidolite (SiO2)
metamorphic
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Quartzite
Quartzite (mainly Silicon Dioxide, SiO2)
metamorphic
Blue Aventurine
Quartzite with inclusions of Dumortierite (SiO2 + Al7(BO3)(SiO4)3O3)
metamorphic
Gold Nugget
Native Gold (Au)
mineral
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
Quartzite
Quartzite (SiO2)
metamorphic
Smoky Quartz
Silicon Dioxide (SiO2) with trace aluminum and irradiation
mineral
Sandstone (Quartzose)
Arenite (Siliciclastic sedimentary rock)
sedimentary
Quartz on Sandstone
Silicon Dioxide (SiO2) in Lithic Sandstone
sedimentary
Jasper (Red/Brown Variety)
Jasper (Silicon Dioxide, SiO2 plus Iron Oxide impurities)
sedimentary
Dumortierite Quartz
Al7(BO3)(SiO4)3O3
mineral
Chert / River Pebble
Silicon Dioxide (SiO2)
sedimentary
Quartzite
Quartzite (mainly SiO2)
metamorphic
Chrysocolla in Matrix
Chrysocolla (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral
Rhyolite
Rhyolite (felsic volcanic rock)
igneous
Druzy Quartz
Crystalline Silicon Dioxide (SiO2)
mineral
Pink Granite
Phaneritic plutonic igneous rock (Alkali-feldspar granite)
igneous
Rough Sapphire
Corundum (Al2O3)
mineral
Granite
Granite (Felsic Intrusive Igneous Rock)
igneous