Dark-colored Igneous Rock (likely Basalt or Diabase)
Basalt (extrusive igneous) or Diabase (intrusive igneous)
Igneous Rock
Category
Igneous And Mineral
Browse igneous and mineral specimens identified by the Rock Identifier community.
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Granite
Granite (compositionally: Quartz, Alkali Feldspar, and Plagioclase)
igneous
Magnetite (potentially Hematite-rich)
Magnetite (Fe3O4)
mineral
Rainbow Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Quartz pebble
Silicon dioxide (SiO2)
mineral
Epidote-bearing Rock
Epidote / Silicate mineral aggregate
metamorphic
Sodalite
Sodalite (Na8Al6Si6O24Cl2)
mineral
Granite Boulder
Intrusive Igneous Rock
igneous
Gabbro or Diorite with Felsic intrusion
Mafic to intermediate intrusive igneous rock with felsic vein/inclusion
igneous
Granite
Felsic intrusive igneous rock
igneous
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Tumbled blue stone, possibly sodalite or blue quartz
Indeterminate from the photograph; possibilities include sodalite (Na₈Al₆Si₆O₂₄Cl₂) or blue quartz (SiO₂)
mineral
Magnetite
Magnetite (Fe3O4)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Granite with Pyrite or Mica
Phaneritic intrusive igneous rock
igneous
Hematite (likely Botryoidal or Specularite variant)
Iron(III) oxide (Fe2O3)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Hematite
Hematite (Iron(III) oxide, Fe2O3)
mineral
Blue Chalcedony
Silicon Dioxide (SiO2)
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Apatite
Fluorapatite, Chlorapatite, and Hydroxylapatite (Ca5(PO4)3(F,Cl,OH))
mineral
Hematite
Iron Oxide (Fe2O3)
mineral
Granite
Felsic intrusive igneous rock
igneous
Apatite
Calcium phosphate fluoride/chloride, Ca5(PO4)3(F,Cl,OH)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Granite or Pegmatite in host rock
Granitoid / Felsic Intrusive Rock
Igneous
Granite Pebble
Intrusive Igneous Rock
igneous
Quartz Mineral
Silicon Dioxide (SiO2)
mineral
Mixed Mineral Collection (Quartz, Amethyst, Rose Quartz, Pyrite, etc.)
Mixed Silicates and Sulfides (SiO2, FeS2)
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
Fluorite
Calcium fluoride (CaF2)
mineral
K-Feldspar Granite Fragment
Granite (Alkali Feldspar-rich)
igneous
Aventurine (likely Green Aventurine)
Silicon Dioxide (SiO2) with mineral inclusions
Mineral/Mineraloid within a rock matrix
Granite
Granite (composed of Quartz, Feldspar, and Mica)
igneous
Quartz with inclusions
SiO2
mineral
Granite
Intrusive Igneous Rock
igneous
Granite
Intrusive Igneous Rock (Felsic)
igneous
Graphite
Graphite (Carbon, C)
mineral