Olivine (Peridot)
Magnesium Iron Silicate (Mg, Fe)2SiO4
mineral
Category
Mineral (Silicate Variety)
Browse mineral (silicate variety) specimens identified by the Rock Identifier community.
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Peridot (Olivine)
(Mg,Fe)2SiO4 (Magnesium Iron Silicate)
mineral
Peridot (Olivine)
Magnesium Iron Silicate (Mg, Fe)2SiO4
mineral
Olivine (Peridot)
Magnesium Iron Silicate (Mg, Fe)2SiO4
Mineral
Olivine (Peridot when gem-quality)
Magnesium Iron Silicate, (Mg,Fe)2SiO4
Mineral
Rhodonite
Rhodonite (Manganese Iron Magnesium Calcium Silicate)
mineral
Chrome Diopside
Diopside (Magnesium Calcium Silicate) - CaMgSi2O6 + Cr
mineral
Almandine Garnet
Iron aluminum silicate (Fe3Al2(SiO4)3)
Mineral
Olivine (Peridot)
Magnesium Iron Silicate ((Mg, Fe)2SiO4)
mineral
Beryl (Aquamarine) in Matrix
Beryllium aluminum silicate (Be3Al2(SiO3)6)
mineral
Polished reddish-brown stone bead, possibly jasper
Likely iron-rich microcrystalline quartz (jasper; SiO₂), but the image is not sufficient for a confident identification
gemstone
Iron-rich jasper (likely rough jasper/chert)
Microcrystalline quartz (SiO₂), colored by iron oxides
mineral
Green sea glass (likely bottle glass)
Human-processed soda–lime silicate glass; not a natural mineral or rock
mineral
Quartz-rich vein rock, possibly milky quartz in altered host rock
Quartz (SiO₂), likely with weathered silicate minerals and iron/manganese staining
mineral
Lapis Lazuli and Amazonite
Complex silicate mineral aggregates (Lazurite, Calcite, Pyrite & Microcline feldspar)
mineral
Mystic Topaz (Treated Quartz or Topaz)
Silicate Mineral (SiO2 or Al2SiO4(F,OH)2) with Titanium coating
gemstone
Sodalite
Na4Al3(SiO4)3Cl (Sodium Aluminum Silicate Chloride)
mineral
Emerald in Matrix
Emerald (Beryllium Aluminum Silicate - Be3Al2(SiO3)6)
mineral
Dalmatian Stone
Dalmatian Jasper (a trade name for an igneous microcrystalline rock composed mostly of feldspar, quartz, and dravite)
igneous
Glass
Amorphous Silicon Dioxide (SiO2)
mineraloid
Turquoise
CuAl6(PO4)4(OH)8·4H2O (Hydrated copper and aluminum phosphate)
mineral
Weathered greenish rock fragment
Indeterminate; possibly epidote- or chlorite-bearing altered silicate rock
mineral
Sandstone (Ferruginous)
Arenite (with iron oxide cement)
sedimentary
Epidote in Quartz
Epidote (Ca2(Al,Fe)3(SiO4)3(OH)) in Quartz (SiO2)
mineral
Rhodonite in Quartz Matrix
Rhodonite (Manganese Iron Magnesium Calcium Silicate - Mn,Fe,Mg,Ca)SiO3
mineral
Limonite (Ironstone Concretion)
Hydrated iron(III) oxide-hydroxide (FeO(OH)·nH2O)
mineral
Olivine (Peridotite)
Magnesium iron silicate ((Mg, Fe)2SiO4)
igneous
Lapis Lazuli
Lapis Lazuli (A metamorphic rock primarily composed of Lazurite: (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, along with Calcite and Pyrite)
metamorphic
Talc
Talc (Hydrated magnesium silicate, Mg3Si4O10(OH)2)
metamorphic
Olivine in Basalt (Peridot)
Magnesium Iron Silicate (Mg,Fe)2SiO4 (Mineral) within Basalt (Rock)
igneous
Ocean Jasper (Orbicular Jasper)
Silicon Dioxide (SiO2) with various inclusions
mineral
Red Jasper with Quartz
Silicon Dioxide (SiO2) with Hematite impurities
sedimentary
Polished leopard-skin jasper
Leopard-skin jasper; an opaque, microcrystalline quartz-rich rock, commonly with iron-oxide and volcanic/mineral inclusions
metamorphic
Picture Jasper
Silicon Dioxide (SiO2) with iron oxide and clay inclusions
sedimentary
Pyrite
Iron Disulfide (FeS2)
mineral
Eclogite (retrograded)
Eclogite (Omphacite-Garnet rock)
metamorphic
Weathered quartz-rich rock, possibly granite or gneiss fragment
Likely granitic rock composed mainly of quartz, feldspar, and minor mica/iron oxides
igneous
Iron Slag
Anthropogenic Vitreous Silicate (Byproduct of Smelting)
Mineral-like byproduct
Slag (Industrial By-product)
Glassy silicate or metallic smelting residue
mineral-like (anthropogenic)
Jasper / Quartzite
SiO2
sedimentary/metamorphic
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Snowflake Obsidian
Vitreous volcanic silicate (SiO2 with Cristobalite inclusions)
igneous