Quartz
Silicon Dioxide (SiO2)
Category
Browse mineral in igneous rock specimens identified by the Rock Identifier community.
Quartz
Silicon Dioxide (SiO2)
Granite
Felsic intrusive igneous rock
Granite
Phaneritic Felsic Igneous Rock
Weathered granitic rock fragment
Granite, predominantly quartz–feldspar–mica assemblage
Granite Pebble (Pegmatitic Quartz-Feldspar River Rock)
Granite / Quartz-Feldspar-Mica Aggregate
Likely basalt or other dark igneous rock
Basalt; predominantly plagioclase feldspar and pyroxene, possibly olivine
Granite
Granite (Felsic Plutonic Rock)
Diorite (Porphyritic) / Granite
Plutonic Igneous Rock (Granodiorite / Diorite)
Granite
Granite (a common igneous rock)
Amygdaloidal Basalt
Basalt (Igneous Volcanic Rock with secondary mineral infilling)
Porphyritic Basalt
Basalt (with plagioclase or k-feldspar phenocrysts)
Unakite
Epidotized Granite
Pegmatite
Igneous Pegmatite
Milky Quartz with Iron Inclusions
Silicon Dioxide (SiO2)
Granite Pebble (Weathered)
Phaneritic Felsic Igneous Rock
Foliated Metamorphic Rock (likely Gneiss or Schist)
Gneissic Metamorphic Rock
Yellow Quartz
Silicon Dioxide (SiO2)
Quartz Crystal Fragment
Silicon Dioxide (SiO2)
Spinifex Texture Komatiite
Komatiite (Ultramafic Volcanic Rock)
Diorite with Quartz Veins
Diorite
Peridotite
Ultramafic intrusive igneous rock
Epidote
Epidote Group (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))
Granite
Felsic intrusive igneous rock
Granite
Phaneritic Igneous Rock (Granite)
Banded Gneiss
Gneiss (High-grade regional metamorphic rock)
Amygdaloidal Basalt
Amygdaloidal Basalt (Mafic silicate with secondary mineral inclusions)
Dalmatian Stone (commonly Dyed)
Dalmatian Jasper (Peralkaline igneous rock)
Vesicular basalt
Basalt, a mafic volcanic rock composed mainly of plagioclase feldspar, pyroxene, and often olivine
Dark igneous rock, likely basalt
Basalt; chiefly plagioclase feldspar, pyroxene, and possibly olivine
Milky Quartz
Silicon Dioxide (SiO2)
Granitic Gneiss
Gneiss (quartz-feldspar-mica complex)
Pyrite
Iron Sulfide (FeS2)
Dark gray fine-grained rock fragment
Likely basalt (possibly andesite); exact identification is limited by the photograph
Granite
Granite (Intrusive Igneous Rock)
Amygdaloidal Basalt
Amygdaloidal Mafic Volcanic Rock
Quartz Vein in Matrix
Silicon Dioxide (SiO2) within Rhyolitic or Granitic Matrix
Dalmatian Stone
Dalmatian Jasper / Aplite
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
Granite
Felsic intrusive igneous rock
Dalmation Stone
Peralkaline Rock (mixed silicate minerals)
Weathered Basalt with Iron Staining
Mafic Igneous Rock
Granite Pebble
Granite