Silicon
Silicon (Si)
mineral
Category
Mineral (Silicate Variety)
Browse mineral (silicate variety) specimens identified by the Rock Identifier community.
Learn about Mineral (Silicate Variety) in the encyclopedia
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Pallasite Meteorite (Sliced and Polished)
Pallasite (Iron-Nickel Matrix with Olivine crystals)
mineral
Tree Agate
Dendritic Agate (Silicon Dioxide, SiO2)
Mineral
Diorite
Diorite (Intermediate intrusive igneous rock)
igneous
Chert Pebble (Jasper variant)
Microcrystalline Quartz (SiO2)
sedimentary
Banded Calcite (often commercially sold as Mexican Onyx or Green Onyx)
Calcium Carbonate (CaCO3)
sedimentary
Yellow Jasper
Silicon Dioxide (SiO2)
sedimentary (microcrystalline silicate)
Red Jasper (River-worn Pebble)
Silicon Dioxide (SiO2) with Ferric Iron inclusions
sedimentary (microcrystalline silicate)
Eudialyte
Eudialyte (Na4(Ca,Ce)2(Fe2+,Mn,Y)ZrSi8O22(OH,Cl)2)
mineral
Rhodonite
Rhodonite (Mn, Fe, Mg, Ca)SiO3
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Sapphire (Corundum variety)
Sapphire (Al₂O₃)
Mineral
Ruby
Corundum (Al2O3 with Chromium traces)
mineral
Quartz with impurities or Host Rock
SiO2 (Silicon Dioxide) with mixed silicates
mineral
Olivine (Peridot)
Magnesium Iron Silicate (Mg, Fe)2SiO4
mineral
Agate
Agate (Chalcedony), SiO2
Mineral
Jasper (Green Jasper/Heliotrope variety)
Silicon Dioxide (SiO2)
sedimentary
Olivine (Peridot)
Magnesium Iron Silicate (Mg,Fe)2SiO4
Mineral
Mixed Mineral Collection (Quartz, Amethyst, Rose Quartz, Pyrite, etc.)
Mixed Silicates and Sulfides (SiO2, FeS2)
mineral
Agate
Cryptocrystalline quartz (SiO2)
Mineral
Quartzite
Quartzite (Primary mineral: SiO2)
metamorphic
Banded Gneiss
Gneiss (high-grade metamorphic silicate rock)
metamorphic
Sandstone
Sandstone (Sedimentary rock composed of silicate grains)
sedimentary
Moonstone (specifically White Moonstone/Adularia)
Potassium aluminum silicate ((K,Na)AlSi3O8)
mineral
Moonstone (Green Moonstone / Garnierite)
Potassium Aluminum Silicate (KAlSi3O8) with inclusions of Garnierite
mineral
Almandine Garnet
Iron aluminum silicate (Fe3Al2(SiO4)3)
mineral
Olivine (Peridot)
Magnesium Iron Silicate (Mg, Fe)2SiO4
mineral
Dumortierite Quartz
Al7BO3(SiO4)3O3 (Aluminum borate silicate)
mineral
Olivine/Peridot
Magnesium Iron Silicate (Mg,Fe)2SiO4
mineral
Peridot (Gem-quality Olivine)
Magnesium Iron Silicate ((Mg, Fe)2SiO4)
mineral
Peridot (Olivine)
Magnesium Iron Silicate (Mg,Fe)2SiO4
mineral
Coprolite
Fossilized Feces
sedimentary
Snowflake Obsidian
Vitreous volcanic silicate (SiO2 with Cristobalite inclusions)
Igneous
Jadeite Jade
NaAlSi2O6 (Sodium Aluminum Silicate)
metamorphic
Epidosite
Epidosite (Metasomatic calcium-aluminum silicate rock)
metamorphic
Quartz Vein in Host Rock (Gabbro or Basalt)
Silicon Dioxide (SiO2) with Mafic Silicates
metamorphic/igneous
Satin Spar (Gypsum)
Hydrous Calcium Sulfate (CaSO4·2H2O)
mineral
Olivine (Peridot)
Magnesium Iron Silicate (Mg, Fe)2SiO4
mineral
Agate (Carnelian / Chalcedony)
Silicon Dioxide (SiO2)
mineral
Petoskey Stone (Petrified Favosites)
Favosites (extinct colonial coral), CaCO3 with Silica replacement
sedimentary
Green Jasper (Chert)
Silicon Dioxide (SiO2)
sedimentary
Raw Green Jasper
Silicon Dioxide (SiO2) with iron silicate inclusions
sedimentary