Chalcedony (specifically Agate or Carnelian variety)
Cryptocrystalline Silica (SiO2)
Category
Browse mineral, specifically a variety of quartz specimens identified by the Rock Identifier community.
Chalcedony (specifically Agate or Carnelian variety)
Cryptocrystalline Silica (SiO2)
Quartzite (specifically Milky Quartz variety)
Quartz (SiO2)
Feldspar (specifically Orthoclase)
Potassium Aluminum Silicate (KAlSi3O8)
Chert (specifically Novaculite)
Microcrystalline Quartz (SiO2)
Feldspar (specifically Orthoclase)
Potassium aluminum silicate (KAlSi3O8)
Fuchsite
Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)
Chert (Flint)
Microcrystalline or cryptocrystalline Quartz (SiO2)
Chert (often called Flint)
Microcrystalline or cryptocrystalline Quartz (SiO2)
Chert (Chalk-associated Flint)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
Chert (often called Flint)
Chert (Microcrystalline or Cryptocrystalline Quartz, SiO2)
Citrine Quartz
Silicon Dioxide (SiO2) - Ferric Iron impurities
Banded Agate (specifically Botswana Agate or Water-line Agate)
Chalcedony (cryptocrystalline variety of Quartz), SiO2
Chert (or Jasper)
Microcrystalline Quartz (SiO2)
Chert (Nodule)
Microcrystalline quartz (SiO2)
Amazonite
Amazonite (KAlSi3O8)
Chert (varieties include Flint and Jasper)
Microcrystalline or Cryptocrystalline Silicon Dioxide (SiO2)
Banded Agate (specifically Carnelian Agate slice)
Chalcedony (cryptocrystalline variety of Quartz), SiO2
Banded Agate (Onyx variety)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Red Jasper
Jasper (Silicon Dioxide, SiO2)
Ocean Jasper
Silicon Dioxide (SiO2) with various inclusions
Agate (Polished Sphere)
Silicon Dioxide (SiO2)
Red Quartzite
Quartzite (mostly SiO2)
Jasper
Silicon Dioxide (SiO2) with iron oxide impurities
Chert (Smoky variety)
Microcrystalline Quartz (SiO2)
Green Aventurine
Silicon Dioxide (Quartz variety with Fuchsite inclusions - SiO2)
Granodiorite
Granodiorite (Intermediate to Felsic Intrusive Rock)
Chert (Yellow Jasper)
Microcrystalline Quartz (SiO2)
Moonstone (with Tourmaline/Mica)
Orthoclase/Albite Feldspar (KAlSi3O8 / NaAlSi3O8)
Yellow Jasper
Silicon Dioxide (SiO2) with iron hydroxides (Goethite)
Ferruginous Quartz
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions
Amazonite
K(AlSi3O8) - Potassium Aluminum Silicate
Red Jasper with Quartz Veining
Silicon Dioxide (SiO2) - Microcrystalline Quartz with Iron Oxide impurities (Hematite)
Carnelian
Carnelian (SiO2)
Agate (specifically a Blue Agate Geode Slice)
Chalcedony (cryptocrystalline variety of Quartz); SiO2
Quartz (specifically Milky/White Quartz)
Silicon Dioxide (SiO2)
Picture Jasper (specifically Biggs or Deschutes variety)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
Red Jasper
Jasper (Silica with Hematite impurities), SiO2
Chert (Yellow Jasper)
Silicon Dioxide (SiO2)
Milky Quartz
Silicon Dioxide (SiO2)
Jasper (specifically Fancy or Polychrome Jasper)
Silicon Dioxide (SiO2) - Chalcedony
Milky Quartz
Silicon Dioxide (SiO2)
Chert (Flint)
Microcrystalline quartz (SiO2)