Carnelian (Chalcedony)
Silicon Dioxide (SiO2)
mineral
Category
Gemstone
Browse gemstone specimens identified by the Rock Identifier community.
Quartz (Smoky Quartz variant)
Silicon Dioxide (SiO2)
mineral
Hematite Nodular Concretion
Iron(III) oxide (Fe2O3)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Carnelian (Orange Agate)
Carnelian (variety of Chalcedony, SiO2)
mineral
Chrysocolla in Cuprite (Sonoran Sunrise)
Cu2-xAlx(H2-xSi2O5)(OH)4·n(H2O) (Chrysocolla) and Cu2O (Cuprite)
mineral
Diorite (Dalmatian Stone)
Phaneritic Plutonic Diorite
igneous
Emerald in Matrix
Beryl (Be3Al2Si6O18)
mineral
Tiger's Eye
Tiger's eye (Pseudomorph of Quartz after Crocidolite), SiO2
metamorphic
Quartz (Milky/Common)
Silicon Dioxide (SiO2)
mineral
Carnelian Agate
Silicon Dioxide (SiO2) - variety of Chalcedony
mineral
Labradorite (Dark or Black variety)
Labradorite (member of Plagioclase Feldspar group), (Na,Ca)(Si,Al)4O8
mineral
Quartz (Druzy/Macro-crystalline)
Silicon Dioxide (SiO2)
mineral
Tektite (Indochinite)
Tektite (High-silica impact glass)
mineraloid
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Blue Lace Agate
Cryptocrystalline Quartz (SiO2)
mineral
Quartz (Druzy/Macro-crystalline)
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Granular)
Silicon Dioxide (SiO2)
mineral
Peridotite (Olivine)
Peridotite (comprising (Mg,Fe)2SiO4)
igneous
Dendritic Opal (Merlinite)
Hydrated Silica with Manganese/Iron oxide inclusions (SiO2·nH2O)
mineral
Quartz (Vein Quartz)
Silicon Dioxide (SiO2)
mineral
Olivine (Peridotite)
(Mg,Fe)2SiO4 (Magnesium Iron Silicate)
igneous
Quartz
Silicon Dioxide (SiO2)
mineral
Fuchsite Quartzite (Green Quartzite)
Fuchsite-bearing Quartzite (K(Al,Cr)2(AlSi3O10)(OH)2 + SiO2)
metamorphic
Yellow Jasper
Silicon Dioxide (SiO2) with Goethite/Iron Oxide inclusions
sedimentary
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Yellow Jasper
Silicon Dioxide (SiO2) with goethite or limonite inclusions
sedimentary
Quartz (Milky/Clear Quartz)
Silicon Dioxide (SiO2)
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Carnelian Agate
Carnelian (SiO2 with iron oxide impurities)
mineral
Potassium Feldspar
Orthoclase (KAlSi3O8)
mineral
Quartz (specifically Clear Quartz or Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Amber (specifically Red or Cherry Amber)
Succinite (Resinite); Chemical formula: C10H16O
Mineraloid
Chrysocolla in Matrix
Hydrated copper phyllosilicate mineral (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral
Olivine (Peridotite)
(Mg,Fe)2SiO4 (Magnesium Iron Silicate)
igneous
Milky Quartz
Silicon Dioxide (SiO2)
Mineral
Botryoidal Chalcedony in Geode/Vug
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Red Jasper
Silicon Dioxide (SiO2) with iron oxide inclusions
mineralological
Smoky Quartz
Silicon Dioxide (SiO2)
mineral