Eclogite
Eclogite (Omphacite-Garnet rock)
metamorphic
Category
Mineral (Silicate Variety)
Browse mineral (silicate variety) specimens identified by the Rock Identifier community.
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Howlite
Calcium borosilicate hydroxide (Ca2B5SiO9(OH)5)
mineral
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Felted Quartz / Chlorite Quartz
Chlorite included Quartz (SiO2 + (Mg,Fe)3(Si,Al)2O5(OH)4)
mineral
Diorite
Intermediate plutonic igneous rock
igneous
Chert / Jasper / Agate (Chalcedony Group)
Microcrystalline Quartz (SiO2)
sedimentary
Bauxite
Bauxite (Aluminum Ore)
sedimentary
Ferruginous Quartz
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions
mineral
White Chalcedony (likely Common Opal or Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Green Common Opal
Hydrated Silica (SiO2·nH2O)
mineral
Aragonite (Onyx Marble)
Calcium Carbonate (CaCO3), Orthorhombic crystal system
mineral
Hemimorphite on Limonite Gossan
Hemimorphite (Zn4Si2O7(OH)2·H2O) on Limonite matrix
mineral
Lazulite
Lazulite (Mg,Fe2+)Al2(PO4)2(OH)2
mineral
Blue Topaz
Al2SiO4(F,OH)2
mineral
Botryoidal Chalcedony (Agate)
Silicon Dioxide (SiO2)
mineral
Green Jasper (Banded Jasper)
Silicon Dioxide (SiO2) with impurities
sedimentary
Amazonite
Potassium Aluminum Silicate (KAlSi3O8)
mineral
Ruby in Kyanite
Corundum in Disthene (Al2SiO5 + Al2O3)
metamorphic
Biotite (Mica)
Biotite - K(Mg,Fe)3AlSi3O10(F,OH)2
mineral
Smoky Quartz occurring with Feldspar
Silicon Dioxide (SiO2) with Potassium Aluminum Silicate (KAlSi3O8)
mineral
Limonite (Iron Ore)
Limonite (unstructured hydrated iron(III) oxide-hydroxides, often FeO(OH)·nH2O)
mineral
Chondrite Meteorite Fragment
Ordinary Chondrite (L or H type)
igneous
White Topaz
Aluminum Silicate Fluoride Hydroxide, Al2SiO4(F,OH)2
mineral
Rhodonite
Rhodonite (Mn,Fe,Mg,Ca)SiO3
mineral
Slag (Industrial Glassy Byproduct)
Ferro-silicate Slag
Anthropogenic / Non-Natural
Yellow Jade (often Serpentine or Dolomite)
Primarily Serpentine (Mg3Si2O5(OH)4) or Dolomite (CaMg(CO3)2), though the term 'yellow jade' is also sometimes applied to varieties of true nephrite or jadeite.
Mineral, often a rock given its aggregate nature
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Biotite (Mica)
Biotite (K(Mg,Fe)3AlSi3O10(OH,F)2)
mineral
Sandstone
Arenite
sedimentary
Pink Quartz (Rose Quartz)
Silicon Dioxide (SiO2)
mineral
Green Aventurine
SiO2 (Quartz with Fuchsite inclusions)
mineral
Banded Gneiss (with Quartz Vein)
Gneiss (SiO2 and varied Silicates)
metamorphic
Bauxite
Bauxite (Al(OH)3, AlO(OH))
sedimentary
Howlite
Howlite (Ca2B5SiO9(OH)5)
mineral
Amazonite
Potassium Aluminum Silicate (KAlSi3O8)
mineral
Moonstone
Potassium Aluminum Silicate (KAlSi3O8)
mineral
Peach Moonstone
Potassium Aluminum Silicate (KAlSi3O8)
mineral
Epidote in Quartz (Unakite-like specimen)
Epidote (Ca2(Al2,Fe)(SiO4)(Si2O7)O(OH)) in Quartz (SiO2)
metamorphic
Rhodonite
Manganese silicate (Mn,Fe,Mg,Ca)SiO3
mineral
Orthoclase Feldspar
Potassium aluminum silicate (KAlSi3O8)
mineral
Mixed Gemstone and Mineral Collection
Mixed Silica and Carbonate minerals (SiO2, CaSO4·2H2O, etc.)
mineral
Sandstone with Ironstone Concretion
Arenite with Ferruginous Cement
sedimentary