Pegmatite
Igneous Pegmatite
igneous
Category
Igneous And Mineral
Browse igneous and mineral specimens identified by the Rock Identifier community.
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Granite / Feldspar gravel
Granite (felsic intrusive igneous rock)
igneous
Granite
Granite
igneous
Tumbled Quartz
Silicon Dioxide (SiO2)
mineral
Rainbow Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Granite
Intrusive igneous rock
igneous
Milky Quartz with Algae/Chlorite
Silicon Dioxide (SiO2)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Peacock Ore
Bornite (Cu5FeS4) or iridescent Chalcopyrite (CuFeS2)
mineral
Granite
Intrusive igneous rock
igneous
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
Obsidian
Volcanic Glass
igneous
Basalt with Vesicular/Amygdaloidal Alteration
Extrusive Igneous Rock (Mafic)
igneous
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Granite with Biotite and Iron Oxide
Intrusive Igneous Rock
igneous
Basalt Pebble
Extrusive Igneous Rock
igneous
Granite
Intrusive igneous rock
igneous
Granite Pebble
Intrusive Igneous Rock
igneous
Granite
Intrusive Igneous Rock
igneous
Granite
Intrusive Igneous Rock
igneous
Granite
Intrusive Igneous Rock
igneous
Granite
Intrusive Igneous Rock
igneous
Granite
Intrusive Igneous Rock
igneous
Granite Pebble
Intrusive Igneous Rock
igneous
Granite
Intrusive Igneous Rock
igneous
Quartz Crystal
Silicon Dioxide (SiO2)
mineral
Epidote
Epidote (Ca2(Al,Fe)3(SiO4)3(OH))
mineral
Granite
Granite (Phaneritic intrusive igneous rock)
igneous
Sodalite
Na8Al6Si6O24Cl2
mineral
Granite
Intrusive Igneous Rock
igneous
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Granite
Granite
igneous
Quartz vein fragment
Quartz, silicon dioxide (SiO₂), likely milky to translucent quartz with iron-oxide or clay inclusions
mineral
Likely quartz-rich stone (possibly milky quartz or quartzite)
Quartz, silicon dioxide (SiO₂), or quartzite if interlocking grains are present
mineral
Small polished or naturally rounded dark-speckled stone; likely diorite or granite
Unconfirmed; possibly a fine-grained diorite or granodiorite composed chiefly of plagioclase and dark mafic minerals
igneous
K-Feldspar
Potassium Feldspar (KAlSi3O8)
mineral
Epidote
Ca2(Al,Fe)3(SiO4)3(OH)
mineral
Muscovite
KAl2(AlSi3O10)(OH)2
mineral
Muscovite
KAl2(AlSi3O10)(OH)2
mineral
Granite
Intrusive Igneous Rock
igneous