Quartz / Chert
Silicon Dioxide (SiO2)
Mineral / Sedimentary
Category
Mineral (Specifically A Gemstone Variety)
Browse mineral (specifically a gemstone variety) specimens identified by the Rock Identifier community.
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Ruby (Pinkish-Red)
Corundum (Al2O3 with Chromium trace)
mineral
Moss Agate
Silicon Dioxide (SiO2) with inclusions
mineral
Milky Quartz Pebble
Quartz (Silicon Dioxide - SiO2)
mineral
Agate (specifically Botswana or Banded Agate variety)
Chalcedony (Silicon Dioxide, SiO2)
mineral
Rough Garnet (Almandine)
Almandine Garnet (Fe3Al2(SiO4)3)
mineral
Emerald / Green Beryl
Beryl (Be3Al2(SiO3)6) with Chromium/Vanadium impurities
mineral
Puddingstone (specifically Michigan/Gowganda Puddingstone)
Conglomerate (Jasper Conglomerate)
sedimentary
Crazy Lace Agate
Chalcedony (Silicon Dioxide, SiO2)
mineral
Ocean Jasper
Spherulitic Chalcedony (SiO2)
sedimentary
Green Jasper with Agate Banding
Silicon Dioxide (SiO2) with impurities of ferrous silicate or chlorite
sedimentary (chemical/biological origin)
Yellow Jasper
Chalcedony (Silicon Dioxide, SiO2)
sedimentary
Red Jasper (Siltstone or Chert-based Jasper)
Silicon dioxide with hematite (SiO2 + Fe2O3)
sedimentary
Pallasite Meteorite
Pallasite (Stony-iron meteorite; Fe-Ni alloy with (Mg,Fe)2SiO4 olivine)
Mineral/Extraterrestrial Rock
Schist (specifically Chlorite/Greenschist)
Chlorite Schist
metamorphic
Milky Quartz Mushroom Carving
Quartz (Silicon Dioxide, SiO2)
mineral
Banded Agate (specifically Carnelian Agate)
Silicon dioxide (SiO2) - Chalcedony variety
mineral
Rainbow Moonstone with Black Tourmaline
White Labradorite (Feldspar variety, (Na,Ca)(Al,Si)4O8) with Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Chert (Nodule)
Chert (Silicon Dioxide, SiO2)
sedimentary
Porphyry
Porphyritic Andesite/Basalt
igneous
Chert (Nodule)
Microcrystalline quartz (SiO2)
sedimentary
Jasper (specifically Polychrome or Desert Jasper)
Silicon Dioxide with impurities (SiO2)
Mineral
Chalcedony (Agate/Chert)
Microcrystalline Quartz (SiO2)
sedimentary
Green Aventurine
Aventurine (a variety of Quartz, SiO2)
Mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Orange Quartz with Hematite inclusions
Quartz (SiO2) with Hematite (Fe2O3) inclusions
Mineral
Amber (Burmite)
Fossilized tree resin (Succinite variant)
Organic mineraloid
Green Aventurine
Aventurine Quartz (SiO2 + Fuchsite mica)
Mineral
Amazonite
Potassium feldspar (Microcline) - K(AlSi3O8)
mineral
Chalcedony (specifically Agate or Carnelian variety)
Cryptocrystalline Silica (SiO2)
mineral
Epidote
Epidote (Ca2(Al,Fe)3(SiO4)3(OH))
mineral
Sunstone
Plagioclase Feldspar (specifically Oligoclase variety with hematite or goethite inclusions) Chemical Formula: (Ca,Na)(Al,Si)2Si2O8
Mineral
Sandstone (likely Greywacke or Siltstone variety)
Arenite / Siltstone (primarily SiO2)
sedimentary
Red Jasper
Jasper (a variety of Chalcedony, SiO₂ with impurities)
Mineral
Pink Granite
Granite (Felsic Plutonic Rock)
igneous
Labradorite (likely Black Labradorite or Larvikite)
Labradorite (Na,Ca)(Al,Si)4O8. If a rock, it is typically anorthosite, gabbro, or norite, or a variety of syenite called Larvikite if it is specifically from Larvik, Norway.
Mineral/Igneous Rock
Banded Agate (specifically Sardonyx Agate)
Silicon Dioxide (SiO2) - Chalcedony variety
mineral
Banded Agate (specifically Botswana Agate or Water-line Agate)
Chalcedony (cryptocrystalline variety of Quartz), SiO2
mineral
Banded Agate (specifically Botswana Agate appearance)
Silicon Dioxide (SiO2) - variety of Chalcedony
mineral
Quartz (Milky/Opaque variety)
Silicon Dioxide (SiO2)
mineral
Picture Jasper (specifically Biggs or Deschutes variety)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
sedimentary