Granite Cobble
Felsic intrusive igneous rock (composition: SiO₂ with KAlSi₃O₈, NaAlSi₃O₈, and CaAl₂Si₂O₈)
Category
Browse mineral (variant of quartz) specimens identified by the Rock Identifier community.
Granite Cobble
Felsic intrusive igneous rock (composition: SiO₂ with KAlSi₃O₈, NaAlSi₃O₈, and CaAl₂Si₂O₈)
Granite
Phaneritic Intrusive Igneous Rock (composed primarily of Quartz, Feldspar, and Mica)
Amazonite
K(AlSi3O8) - Lead-bearing Microcline (Tectosilicate)
Quartz (Citrine or Iron-Stained)
Silicon Dioxide (SiO2)
Synthetic Blue Aura Quartz
Silicon Dioxide (SiO2) with Metallic Infusion
Quartz Geode
Silicon Dioxide (SiO2) in a Geode body
Yellow Quartz Pebble
Silicon Dioxide (SiO2)
Ferruginous Quartz (River Pebble)
Silicon Dioxide (SiO2) with Iron Oxide inclusions
Clear Quartz (Druzy/Crystal Cluster)
Silicon Dioxide (SiO2)
Iron-Stained Quartz Pebble
Silicon Dioxide (SiO2) with Iron Oxide (Limonite/Goethite) inclusions
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
Rose Quartz Beads
SiO2 (Silicon Dioxide with trace inclusions of Ti, Fe, or Mn)
Quartz (Smoky/Milky variety)
Silicon Dioxide (SiO2)
Quartz (Milky/Crystalline variety)
Silicon Dioxide (SiO2)
Quartz nodule (River pebble)
Silicon Dioxide (SiO2)
Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
White Quartz Pebble
Silicon Dioxide (SiO2)
Quartz (Iron-Stained)
Silicon Dioxide (SiO2)
Quartz (Milky/Clear variety)
Silicon Dioxide (SiO2)
Milky Quartz Pebble
Silicon Dioxide (SiO2)
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Quartz (Chert/Chalcedony Variety)
Silicon Dioxide (SiO2)
Sandstone
Sandstone (clastic sedimentary rock, composed predominantly of sand-sized minerals or rock fragments)
Stiped Slate Beach Pebble
Low-grade Metamorphic Slate with Quartz Vein (SiO2 on Phyllosilicate base)
Fuchsite (Chrome Mica)
K(Al,Cr)2(AlSi3O10)(OH)2
Aventurine Quartz
Silicon Dioxide (SiO2) with inclusions (typically Fuchsite/Mica)
Fairburn Agate
Cryptocrystalline Quartz (SiO2)
Milky Quartz (river pebble)
Quartz (Silicon Dioxide, SiO2)
Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
Quartz (Milky/Crystalline)
Quartz (Silicon Dioxide, SiO2)
Quartz with Iron Staining
Silicon Dioxide (SiO2) with Hematite inclusions
Quartzite
Quartzite (primarily SiO2)
Sandstone
Arenite
Banded Chert
Chert (a microcrystalline variety of quartz, SiO2 with minor impurities)
Milky Quartz (Tumbled)
Quartz (Silicon Dioxide, SiO2)
Milk Quartz (White) and Yellow Aventurine (Yellow)
Silicon Dioxide (SiO2)
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
Smoky Quartz in Matrix
Silicon Dioxide (SiO2)
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
Orange Quartzite / Carnelian Agate
Silicon Dioxide (SiO2)
Milky Quartz Pebbles
Silicon Dioxide (SiO2)
Ferruginous Sandstone (Gerrit)
Arenite with Iron Oxide cementation