Orthoclase Feldspar
Orthoclase (KAlSi3O8)
Mineral
Category
Mineral (Specifically A Variety Of Chalcedony, Which Is A Cryptocrystalline Quartz)
Browse mineral (specifically a variety of chalcedony, which is a cryptocrystalline quartz) specimens identified by the Rock Identifier community.
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Jasper/Flint variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Flint)
Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Yellow Jasper/Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Dyed Blue Agate (Dragon Vein Agate)
Silicon Dioxide (SiO2) with artificial cobalt/organic dyes
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (often called Flint when dark)
Sedimentary cryptocrystalline quartz (SiO2)
sedimentary
Chert (specifically Flint or Dark Chert)
Chert (SiO2)
sedimentary
Chert (Pebble)
Microcrystalline or cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Quartzite with Gneissic Banding
Quartzite (primarily SiO2) with mafic mineral inclusions
metamorphic
Blue Chalcedony
Chalcedony (cryptocrystalline Silicon Dioxide - SiO2)
mineral
Blue Dyed Agate
Silicon Dioxide (SiO2) with artificial pigment
mineral
Chert Pebble (Jasper variety)
Microcrystalline Quartz (SiO2)
sedimentary
Clear Quartz (beads in a bracelet)
Quartz (SiO2)
Mineral
Moss Agate
Chalcedony (Silicon Dioxide) with dendritic inclusions (SiO2)
mineral
Travertine (Tufa)
Calcium Carbonate (CaCO3)
sedimentary
Chert (Jasper/Flint variety)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (Flint variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Chert (Flinty variety)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary
Agate (Polished Slice)
Banded Chalcedony (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Chert (Jasper variety)
Silicon Dioxide (SiO2)
sedimentary
Aventurine
Aventurine Quartz (SiO2 with inclusions)
Mineral
Specular Hematite (Specularite)
Iron Oxide (Fe2O3)
mineral
Granite
Phaneritic Plutonic Felsic Rock (primarily Quartz (SiO2), Alkali Feldspar, and Plagioclase Feldspar)
igneous
Bumble Bee Jasper
Calcite-bearing Volcanic Tuff (not a true Jasper)
sedimentary
Gneiss
Gneiss (a rock type, not a specific mineral with a formula)
Metamorphic Rock
Quartzite Pebble
Quartzite (SiO2)
metamorphic
Emerald
Beryl (Be3Al2Si6O18), specifically the green variety colored by chromium or vanadium
Mineral (Gemstone variety of Beryl)
Black Onyx
Chalcedony (Silicon Dioxide, SiO2)
mineral
Green Tiger's Eye
Silicified Crocidolite (Quartz variety, SiO2)
metamorphic
Yellow Jasper
Silicon Dioxide (SiO2) with Ferric Hydroxide impurities
mineral
Mixed Tumbled Stones (Mostly Agate, Jasper, and Quartz)
Silicon Dioxide (SiO2)
sedimentary and metamorphic minerals
Banded Calcite (often sold as 'Mexican Onyx' or 'Calcite Onyx')
Calcite (Calcium Carbonate, CaCO3)
sedimentary
Chert (varieties include Flint or Jasper)
Microcrystalline or Cryptocrystalline Quartz (SiO2)
sedimentary