Quartz / Vein Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Category
Igneous Rock
Browse igneous rock specimens identified by the Rock Identifier community.
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Quartz (Milky or Smoky variant)
Silicon Dioxide (SiO2)
mineral
Carnelian
Carnelian (a variety of Chalcedony); SiO2 (Silicon Dioxide)
mineral
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz / Milky Quartz
Silicon Dioxide (SiO2)
mineral
Rough Agate/Chert Nodules
Cryptocrystalline Quartz (SiO2)
sedimentary
Carnelian
Carnelian Chalcedony (SiO2 with Iron Oxide impurities)
mineral
Quartz Vein in Gneiss or Basalt
Milky Quartz (SiO2) within Metamorphic Host Rock
Metamorphic or Igneous with Mineral Inclusion
Granite
Phaneritic plutonic rock (composed of Quartz, Feldspar, and Mica/Amphibole)
igneous
Granitic Pegmatite
Granite Pegmatite (principally KAlSi3O8, SiO2, and KAl2(AlSi3O10)(OH)2)
igneous
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Greenstone Pebble
Metabasalt (often containing chlorite, actinolite, or epidote)
metamorphic
Ocellar Rhyolite
Rhyolite (featuring orbicular/ocellar quartz and feldspar textures)
igneous
Snowflake Obsidian
Volcanic Glass with Cristobalite inclusions
igneous
Porphyritic Basalt (Chinese Writing Stone/Flower Stone)
Porphyritic Basalt (primarily Plagioclase Feldspar in a Mafic groundmass)
igneous
Amygdaloidal Basalt
Vesicular Basalt with secondary mineral infilling (commonly Zeolites, Calcite, or Quartz)
igneous
Meteorite (Chondrite)
Stony Meteorite (Ordinary Chondrite)
igneous
Not a rock
Not a rock
Not a rock
Not a rock
Not a rock
Not a rock
Basalt (Lava Rock) and Dyed Glass/Quartz
Scoria (Vesicular Basalt)
igneous
Gneiss (Banded Gneiss)
Gneiss
metamorphic
Peacock Ore (Bornite or Chalcopyrite treated with acid)
Bornite (Cu5FeS4) or Acid-washed Chalcopyrite (CuFeS2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
White Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
mineral
Greenstone / Metagraywacke
Metamorphosed basaltic or sedimentary rock (Complex Silicate)
metamorphic
River Rock (likely Gneiss or Quartzite)
Metamorphic rock specimen (potentially Foliated Gneiss)
metamorphic
Labradorite (tumbled)
Labradorite (a plagioclase feldspar mineral between anorthite and albite; chemical formula: (Ca,Na)(Si,Al)4O8)
Mineral
Pumice
Pumice (Vesicular volcanic glass)
igneous
Pumice
Pumice (Vesicular volcanic glass)
igneous
Basalt Porphyry
Porphyritic Basalt
igneous
Basalt
Vesicular Basalt
igneous
Pumice
Vesicular Rhyolite or Andesite (Amorphous volcanic glass)
igneous
Pumice
Pumice (Vesicular Rhyolite/Andesite)
igneous
Basalt with Amygdules
Amygdaloidal Basalt
igneous
Basalt (Greenstone)
Amygdaloidal Basalt / Chloritized Basalt
Igneous
Banded Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Quartz on Greenstone
Silicon Dioxide (SiO2) on Altered Igneous Geologic Unit
metamorphic
Quartz (Pebble)
Quartz (SiO₂)
Mineral
Clear Quartz (Rock Crystal)
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) within Metasedimentary or Igneous matrix
mineral