Foliated Metamorphic Rock (likely Gneiss or Schist)
Gneissic Metamorphic Rock
Category
Browse mineral (specifically a variety of quartz) specimens identified by the Rock Identifier community.
Foliated Metamorphic Rock (likely Gneiss or Schist)
Gneissic Metamorphic Rock
Imperial Topaz
Aluminum silicate fluoride hydroxide (Al2SiO4(F,OH)2)
Sandstone (Ferruginous)
Arenite with Iron Oxide staining (Fe2O3)
Citrine
Quartz (SiO₂)
Quartz (Common Grains)
Silicon Dioxide (SiO2)
Quartz with Oxides
Silicon Dioxide (SiO2)
Moqui Marble
Hematite-Goethite Concretion
White Quartz
Quartz (Silicon Dioxide, SiO2)
Clear Quartz
Silicon Dioxide (SiO2)
Clear Quartz
Silicon Dioxide (SiO2)
Clear Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Honey Calcite
Calcium Carbonate (CaCO3)
Chalcedony (likely agate/chert variety)
Microcrystalline quartz, SiO₂
Smoky Quartz
Silicon Dioxide (SiO2) with aluminum impurities
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
Quartzite
Metamorphosed Quartz Sandstone (SiO2)
Dendritic Agate
Silicon Dioxide (SiO2) with Manganese/Iron inclusions
Jasper
Jasper (Silicon Dioxide, SiO2)
Tumbled Quartz
Silicon Dioxide (SiO2)
Red Jasper
Silicon dioxide (SiO2)
Quartz
Quartz (SiO₂)
Quartz
Quartz (SiO₂)
Quartz (Milky/Smoky variety)
Silicon Dioxide (SiO2)
Tumbled milky quartz
Quartz (SiO₂), microcrystalline or massive variety
Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
Polished red jasper
Jasper, a microcrystalline variety of quartz (SiO₂), colored mainly by iron oxides
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
Rough Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of Titanium, Iron, or Manganese
Polished River Jasper
Silicon Dioxide (SiO2) with iron and other mineral inclusions
Blue chalcedony (likely common blue agate)
Microcrystalline quartz, SiO₂; chalcedony variety
Amethyst Cluster
Silicon Dioxide (Quartz variety), SiO2
Amethyst
Silicon Dioxide (Quartz variety), SiO2
Carnelian
Silicon Dioxide (Quartz variety, SiO2)
Carnelian
Silicon Dioxide (Quartz variety), SiO2
Amethyst
Silicon dioxide (Quartz variety), SiO2
Carnelian
Carnelian (Cryptocrystalline variety of Quartz, SiO2)
Carnelian
Carnelian (Chalcedony / Quartz variety, SiO2)
Chalcedony (Banded/Mottled Variety)
Chalcedony (a cryptocrystalline variety of Quartz, SiO2)
Banded Agate (Lake Superior Agate type)
Agate (Cryptocrystalline Variety of Quartz, SiO2)
Green Aventurine
Quartz variety (SiO2 with inclusions of Fuchsite)
Green Banded Agate
Agate (Cryptocrystalline variety of Quartz, SiO2)