Quartz
Silicon Dioxide (SiO2)
mineral
Category
Mineral (Specifically A Gemstone Variety)
Browse mineral (specifically a gemstone variety) specimens identified by the Rock Identifier community.
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Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silica / Silicon Dioxide), SiO2
mineral
Citrine
Quartz (SiO₂) variety
Mineral
Granitic Pegmatite
Granite Pegmatite (coarse-grained intrusive igneous rock)
igneous
Amethyst
Quartz (Silicon Dioxide, SiO2)
gemstone
Garnet (specifically Almandine)
Almandine (Fe3Al2(SiO4)3)
mineral
Prehnite
Prehnite - Ca2Al(AlSi3O10)(OH)2
mineral
Amazonite
Microcline (KAlSi3O8) with Pb impurities
mineral
Sunstone
Oligoclase (Plagioclase Feldspar), (Ca,Na)(Al,Si)4O8
mineral
Green Jasper (Chert)
Silicon Dioxide (SiO2)
sedimentary
Microcline Feldspar
KAlSi3O8
mineral
Chert (Flint)
Silicon Dioxide (SiO2)
sedimentary
White Jade (Nephrite)
Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)
metamorphic
Chalcedony (Agate/Chert)
Microcrystalline Quartz (SiO2)
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Jasper (specifically Chert or Orbicular Jasper)
Silicon Dioxide (SiO2)
sedimentary
Banded Agate (specifically Lake Superior Agate type)
Silicon Dioxide (SiO2) - variety Chalcedony
mineral
Epidote (Unakite variety)
Epidosite (Metasomatic rock containing Ca2(Al,Fe)3(SiO4)3(OH))
metamorphic
Peridot
Olivine (Mg, Fe)₂SiO₄
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Chert (specifically Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Chert (specifically Agate/Jasper variety)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Chalcedony (specifically Agate or Carnelian pebble)
Chalcedony (Microcrystalline Quartz, SiO2)
mineral
Chert (specifically Black Chert or Flint)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Mixed Mineral Bead Bracelet
Polycrystalline and Monocrystalline Silicates/Oxides (Quartz, Howlite, Hematite)
gemstone
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
White Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (specifically Milky Quartz/Quartzite)
Silicon Dioxide (SiO2)
Mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Labradorite
Labradorite (a variety of Plagioclase Feldspar), Na(AlSi3O8) to Ca(Al2Si2O8)
Mineral
Ruby (Corundum)
Al2O3 (Aluminium oxide with Chromium impurities)
Mineral
Plagioclase Feldspar (specifically Albite/Oligoclase)
(Na,Ca)(Si,Al)4O8
mineral
Quartz
Silicon dioxide (SiO2)
mineral
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
sedimentary
Garnet (specifically Almandine or Pyrope)
Almandine (Fe3Al2Si3O12) or Pyrope (Mg3Al2Si3O12)
mineral
Ruby
Corundum (Aluminum Oxide, Al2O3)
gemstone
Red Quartzite
Quartzite (mostly SiO2)
metamorphic
Red Jasper
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Green Jasper with Agate Banding
Silicon Dioxide (SiO2) with impurities of ferrous silicate or chlorite
sedimentary (chemical/biological origin)