Quartz (Smoky/Grey Variety)
Silicon Dioxide (SiO2)
mineral
Category
Mineral (Variety Of Chalcedony)
Browse mineral (variety of chalcedony) specimens identified by the Rock Identifier community.
Orthoclase Feldspar (Sunstone variety)
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Quartz (Drusy/Crystalline variety)
Silicon Dioxide (SiO2)
mineral
Quartz (Orangey-white variety)
Silicon Dioxide (SiO2)
mineral
Banded Agate (Onyx Variety)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Quartz (Peach/Orange variety)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Yellowish variety)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky or Clear variety)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Clear variety)
Silicon Dioxide (SiO2)
mineral
Amethyst (Chevron or Banded variety)
Silicon Dioxide with Iron impurities (SiO2)
mineral
Quartz (Smoky/Milky variety)
Silicon Dioxide (SiO2)
mineral
Amber (Dark/Black Variety)
Succinite (Resinite), C10H16O
mineral
Quartz (Smoky/Grey variety)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Clear variety)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Yellowish variety)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Crystal variety)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky or Cloudy variety)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Clear variety)
Silicon Dioxide (SiO2)
mineral
Mica (Biotite or Phlogopite variety)
Phyllosilicate (complex mineral formula involving K, Mg, Fe, Al, Si, and O)
mineral
Fuchsite
Fuchsite (a variety of Muscovite mica, K(Al,Cr)2(AlSi3O10)(OH)2)
mineral
Peridot (Olivine)
Olivine, (Mg,Fe)2SiO4
Mineral
Quartz Geode (likely within Limestone or Dolomite matrix)
Quartz (SiO₂)
Mineral within a Sedimentary Rock
Basalt with Plagioclase Phenocrysts
Porphyritic Basalt
igneous
Vesicular Basalt with Amygdaloidal Infill
Basalt (Mafic Extrusive Igneous Rock)
igneous
Pink Halite (Himalayan Salt)
Halite (Sodium Chloride, NaCl)
sedimentary
Rose Quartz
Silicon Dioxide with trace inclusions (SiO2)
mineral
Chert / Flint
Microcrystalline or cryptocrystalline quartz (SiO2)
sedimentary
Obsidian
Volcanic Glass (70-75% SiO2 with MgO and Fe3O4)
igneous
Granite
Granite
igneous
Chert / Flint
Chert (varietal name for microcrystalline quartz). Chemical formula: SiO₂
Mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Rough Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Obsidian
Obsidian (principally SiO2 with MgO and Fe3O4)
igneous
Green Jasper
Jasper (variety of Microcrystalline Quartz, SiO2)
sedimentary
Ferruginous Quartz
Silicon Dioxide (SiO2) with Iron Oxide inclusions
mineral
Chert (specifically Tan/Brown Chert)
Chert (SiO2)
sedimentary
Sandstone (Greywacke)
Arenite / Clastic Sedimentary Rock
sedimentary
Obsidian
Obsidian (Volcanic Glass, SiO2 + impurity)
Igneous
Rose Quartz
Silicon Dioxide (SiO2)
mineral