Vuggy Quartz on Matrix
Silicon Dioxide (SiO2)
mineral
Category
Rock
Browse rock specimens identified by the Rock Identifier community.
Iron-Stained Quartz (Riverside Cobble)
Silicon Dioxide (SiO2) with Limonite/Hematite inclusions
mineral
Andesite
Andesite (Intermediate Extrusive Volcanic Rock)
igneous
Yellow Quartzite Pebble
Quartzite (primarily SiO2)
metamorphic
Abbey Bominable (Monster High character)
Anthropomorphic Yeti / Digital Animation
not a rock (animated character)
Basalt
Basalt (composition of Plagioclase feldspar and Pyroxene)
igneous
Gneiss Pebble
Gneiss
metamorphic
Sandstone
Arenite (primarily SiO2)
sedimentary
Graywacke
Graywacke
sedimentary
Turquoise
Turquoise (CuAl6(PO4)4(OH)8·4H2O)
mineral
Travertine
Terrestrial Sedimentary Rock (Calcium Carbonate, CaCO3)
sedimentary
Conglomerate
Conglomerate
Sedimentary Rock
Sandstone (likely Fossiliferous)
Arenite / Fossiliferous Sandstone (SiO2 composition)
sedimentary
Scoria (Lava Rock)
Vesicular Basalt / Scoria
Igneous
Scoria (Lava Rock)
Mafic extrusive volcanic rock (Scientific formula varies based on mineral content: primarily SiO2, MgO, and FeO)
igneous
Sandstone Pebble
Arenite (primarily Quartz, SiO2)
sedimentary
Scoria (Lava Rock)
Aphanitic vesicular mafic igneous rock
igneous
Conglomerate (River Rock)
Clastic sedimentary rock (primarily SiO2)
sedimentary
Scoria (Lava Rock)
Scoria (Vesicular Basaltic Glass/Rock)
igneous
Chert Pebble with Quartz Veins
Microcrystalline Quartz (SiO2)
sedimentary
Sandstone (Quartzose)
Arenite (composed primarily of SiO2)
sedimentary
Limonite-stained Quartz
Silicon Dioxide (SiO2) with Iron Oxide/Hydroxide (FeO(OH)·nH2O) staining
mineral
Sandstone
Arenite (primarily SiO2)
sedimentary
Granodiorite
Granodiorite
igneous
Yellow Quartzite
Quartzite (SiO2)
metamorphic
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Red Scoria (Lava Rock)
Scoria (Vesicular Basalt/Andesite)
igneous
Quartzite (River Pebble)
Recrystallized Quartz (SiO2)
metamorphic
Quartz (Milky Quartz / Quartzite)
Silicon Dioxide (SiO2)
mineral
Quartz with Mica Schist (Pegmatite Specimen)
SiO2 (Silicon Dioxide) and Phyllosilicates (Biotite/Muscovite)
Igneous/Metamorphic Hybrid
Geode (Chert or Quartz Nodule)
Silicon Dioxide (SiO2)
sedimentary
Gemstone Sand (Mineral Assortment)
Mixed Mineral Concentrates (Commonly including Quartz SiO2, Garnet X3Y2(SiO4)3, and Tourmaline (Na,Ca)(Li,Mg,Al)3(Al,Fe,Mn)6(BO3)3(Si6O18)(OH,F)4)
mineral
Quartz (Clear Quartz/Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Red Sandstone (Old Red Sandstone)
Ferruginous Sandstone (SiO2 + Fe2O3)
sedimentary
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Sandstone
Arenite (primarily SiO2 - Silicon Dioxide)
sedimentary
Metagabbro / Epidote Gneiss
Epidote bearing Hornblende Gneiss
metamorphic
Sandstone (Ferruginous)
Arenite (primarily SiO2 with Fe2O3 staining)
sedimentary
Olivine in Basalt (Peridot)
Magnesium Iron Silicate (Mg,Fe)2SiO4 (Mineral) / Scoriaceous Basalt (Host Rock)
igneous