Smoky Quartz
Silicon Dioxide (SiO2)
Category
Browse metamorphic, likely sedimentary with quartz veins specimens identified by the Rock Identifier community.
Smoky Quartz
Silicon Dioxide (SiO2)
Pyrite
Iron Disulfide (FeS2)
Diopside (likely Chromian Diopside)
Diopside, part of Clinopyroxene family of inosilicates. Chemical formula: CaMgSi2O6. The green variety is often Chromian Diopside due to chromium impurities.
Petrified Wood
Silicified Wood (SiO2)
Petrified Wood
Silicified Wood (SiO2)
Citrine Quartz (Yellow Quartz)
Silicon Dioxide (SiO2) with iron impurities
Jasper
Jasper (Silicate mineral, SiO2)
Jasper (likely a variety of Yellow or Mustard Jasper)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Chert (specifically var. Flint or Jasper-rich Breccia)
Microcrystalline Quartz (SiO2)
Chert (specifically Iron-stained or Jasperoid Chert)
Microcrystalline Quartz (SiO2)
Citrine
Silicon Dioxide (SiO2)
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
Sandstone, Quartzite, and River Pebbles
Silicon Dioxide (SiO2) based Sedimentary/Metamorphic structures
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Quartz (Milky or Grainy Variety)
Silicon Dioxide (SiO2)
Chert (Nodule)
Microcrystalline or Cryptocrystalline Silica (SiO2)
Aventurine
Silicon Dioxide (SiO2) with inclusions
Aventurine (Green)
Aventurine Quartz (SiO2 + Fuchsite inclusions)
Quartz
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Jade (likely Jadeite)
Jadeite (a pyroxene mineral) or Nephrite (a variety of amphibole mineral)
Yellow Quartzite (or Quartz River Pebble)
Silicon Dioxide (SiO2)
Milky Quartz with Mica
Silicon Dioxide (SiO2) with Muscovite Mica [KAl2(AlSi3O10)(OH)2]
Milky Quartz
Silicon Dioxide (SiO2)
Greywacke with Quartz Veins
Lithic Sandstone (Greywacke) with SiO2 inclusions
Basalt with Quartz/Calcite Vein
Amygdaloidal Basalt (matrix) with Mineral Vein filling
Garnet in Matrix (likely Almandine in Quartz/Mica Schist)
Almandine Garnet (Fe3Al2(SiO4)3) in Quartz-Feldspar host rock
Ocean Jasper
Spherulitic Chalcedony (SiO2)
Green Jasper (with Quartz veining)
Jasper (Silica-rich microcrystalline variety of Quartz), formula: SiO2
Smoky Quartz
Silicon Dioxide (SiO2)
Sandstone (Ferruginous)
Arenite (Fe2O3 dominant staining)
Petrified Wood
Silicified wood (Quartz/Chalcedony/Opal replacing organic matter)
Chert (Jasper variety)
Silicon Dioxide (SiO2)
Chert (Iron-stained)
Microcrystalline or cryptocrystalline Quartz (SiO2)
Milky Quartz (Tumble Fragment)
Silicon Dioxide (SiO2)
Fluorite with Quartz coating
Calcium Fluoride (CaF2) with Silicon Dioxide (SiO2)
Banded Chert
Cryptocrystalline Quartz (SiO2)
Fuchsite (Green Muscovite in Quartz)
Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)
Yellow Chert (Gold-colored River Pebble)
Microcrystalline Quartz (SiO2) with Limonite/Goethite staining
Quartz Vein in Host Rock
Silicon Dioxide (SiO2)
Smoky Quartz
Silicon Dioxide (SiO2)
Smoky Quartz
Silicon Dioxide (SiO2)