Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Category
Igneous And Mineral
Browse igneous and mineral specimens identified by the Rock Identifier community.
Learn about Igneous And Mineral in the encyclopedia
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Magnetite
Magnetite (Fe3O4)
mineral
Hematite
Iron Oxide (Fe2O3)
mineral
White Topaz
Al2SiO4(F,OH)2
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Hypersthene (or Enstatite/Ferrosilite)
Orthopyroxene series (Mg,Fe)SiO3 - specifically, historically hypersthene (intermediate member) now referred to as Enstatite (Mg-rich) or Ferrosilite (Fe-rich)
Mineral
Olivine (Peridot)
Magnesium Iron Silicate (Mg,Fe)2SiO4
mineral
Granite or Pegmatite in host rock
Granitoid / Felsic Intrusive Rock
Igneous
Unidentified Dark Mineral or Rock
Indeterminate (Likely Silicon Dioxide or Carbon-based)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Gabbro
Gabbro (Mafic Plutonic Rock)
igneous
Rainbow Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Mixed Mineral Collection
Multi-mineral Assemblage (Quartz, Jasper, Obsidian, Pyrite, etc.)
mineral
Quartz (Milky/Clear variety)
Silicon Dioxide (SiO2)
mineral
Magnetite (Lodestone)
Magnetite (Fe3O4)
mineral
Sodalite
Sodalite (Na8Al6Si6O24Cl2)
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Magnetite (potentially Hematite-rich)
Magnetite (Fe3O4)
mineral
Quartz in Host Rock
Silicon Dioxide (SiO2) in Rhyolite or Granite matrix
igneous
Magnetite
Magnetite (Fe3O4)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Milky Quartz in Epidote Host Rock
Crystalline Silicon Dioxide (SiO2) with Epidote Ca2(Al,Fe)3(SiO4)3(OH)
mineral
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Fluorite on Host Rock
Calcium Fluoride (CaF2)
mineral
Pyrite
Iron Pyrite (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Eudialyte
Na15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2
mineral
Quartz with inclusions
SiO2
mineral
Dark Igneous Rock (Likely Basalt or Diabase)
Basalt (extrusive igneous rock) or Diabase (intrusive igneous rock - also known as Dolerite), largely composed of plagioclase feldspar, pyroxene (augite), and sometimes olivine and amphibole. Exact mineralogy would require thin section analysis.
Igneous
Sodalite
Na8(Al6Si6O24)Cl2
mineral
Labradorite
Labradorite (Ca, Na)(Al, Si)4O8
mineral
Sodalite
Sodium Aluminum Silicate Chloride (Na8Al6Si6O24Cl2)
mineral
Apatite
Fluorapatite, Chlorapatite, and Hydroxylapatite (Ca5(PO4)3(F,Cl,OH))
mineral
Quartz (Milky/Rose Quartz)
Silicon Dioxide (SiO2)
mineral
Nephrite Jade
Nephrite
Mineral/Rock
Sunstone
Plagioclase Feldspar (Na,Ca)(Al,Si)4O8
gemstone
Granite
Granite (composed of Quartz, Feldspar, and Mica)
igneous
Magnetite
Magnetite (Iron(II,III) oxide, Fe3O4)
mineral
Granite
Granite (Phaneritic Quartz-Feldspar Plutonic Rock)
igneous
Fluorite
Calcium fluoride (CaF2)
mineral
Quartz Heart or Arrowhead Shape
Silicon Dioxide (SiO2)
mineral