Carnelian (a variety of Chalcedony)
Silicon dioxide (SiO2) with iron oxide impurities
Category
Browse mineral (synthetic paper and ink polymorph) specimens identified by the Rock Identifier community.
Carnelian (a variety of Chalcedony)
Silicon dioxide (SiO2) with iron oxide impurities
Blue Chalcedony
Chalcedony (cryptocrystalline Silicon Dioxide, SiO2)
Almandine Garnet
Iron aluminum silicate (Fe3Al2(SiO4)3)
Dream Amethyst (Chevron Amethyst)
Silicon Dioxide with inclusions (SiO2)
Howlite (White Buffalo Turquoise)
Howlite (Calcium Borosilicate Hydroxide), Ca2B5SiO9(OH)5
Gold Flakes in Oil (Novelty Specimen)
Native Gold (Au)
Chakra Stone Tower (Composite Multi-Mineral)
Crystalline Silicon Dioxide composite (SiO2) with various inclusions
Pink Quartz (Rose Quartz variant)
Silicon Dioxide (SiO2)
White Opal (Common)
Hydrated Silica (SiO2·nH2O)
Gold Ore
Native Gold (Au) in Matrix
Red Jasper
Jasper (Silicon Dioxide with Iron Oxide inclusions, SiO2)
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of Titanium, Iron, or Manganese
Pyrite (on Quartz/Host Rock)
Iron Sulfide (FeS₂)
Amazonite
Microcline (KAlSi3O8)
Tourmalinated Quartz
Silicon Dioxide (SiO2) with Schorl inclusions (NaFe2+3Al6(BO3)3Si6O18(OH)4)
Amethyst
Amethyst (Silicon Dioxide with iron impurities), SiO2
Petrified Wood
Silicified Wood (SiO2)
Diamond (in a jewelry setting)
Carbon (C)
Moonstone
Orthoclase Feldspar (containing Albite lamellae), (KAlSi3O8)
Amethyst
Amethyst (Silicon Dioxide - SiO2 with iron impurities)
Turquoise
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
Labradorite
Labradorite, (Ca, Na)(Al, Si)4O8
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
Quartz (Milky or Clear Quartz fragment)
Silicon Dioxide (SiO2)
Prehnite
Prehnite (Ca2Al2Si3O10(OH)2)
Amethyst
Quartz (Silicon Dioxide) with Iron impurities, SiO2
Prehnite
Prehnite - Ca2Al(AlSi3O10)(OH)2
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
Chalcedony (Common Agate)
Silicon Dioxide (SiO2)
Red Coral
Corallium rubrum
Yellow Jasper
Silicon Dioxide (SiO2) with iron oxide impurities
Moss Agate
Chalcedony (SiO2) with inclusions of hornblende or chlorite
Blue Quartz (Dumortierite Quartz)
Quartz (SiO2) with inclusions of Dumortierite (Al7(BO3)(SiO4)3O3)
Hematite
Iron(III) oxide (Fe2O3)
Agate (specifically Botswana or Banded Agate variety)
Chalcedony (Silicon Dioxide, SiO2)
Moissanite
Silicon Carbide (SiC)
Chlorite Phantom Quartz
Silicon Dioxide (SiO2) with Chlorite group inclusions [(Mg,Fe)3(Si,Al)4O10(OH)2·(Mg,Fe)3(OH)6]
Moss Agate
Silicon Dioxide (SiO2) with inclusions of manganese or iron oxides
Rhodonite
Rhodonite (Manganese Iron Magnesium Calcium Silicate) - (Mn,Fe,Mg,Ca)SiO3
Blue Agate (Dyed)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
Quartz (Milky and Bull Quartz)
Silicon Dioxide (SiO2)
Amethyst (Rough Quartz)
Silicon Dioxide (SiO2) with iron impurities