Granite Cobble
Granite
igneous
Category
Igneous Or Mineral
Browse igneous or mineral specimens identified by the Rock Identifier community.
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Weathered vesicular basalt (likely amygdaloidal basalt)
Basalt, chiefly plagioclase and pyroxene with possible olivine; cavities may contain secondary zeolites, calcite, or silica
igneous
Unidentified metallic-looking mineral fragment
Indeterminate; possible galena, magnetite, or metal-rich sulfide/ore fragment
mineral
Unidentified small mineral fragments
Likely quartz- or feldspar-rich material; species cannot be determined reliably from the image
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Sugilite
KNa2(Fe,Mn,Al)2Li3Si12O30
mineral
Quartz
Silicon dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Sugilite
KNa2(Fe,Mn,Al)2Li3Si12O30
mineral
Prehnite
Ca2Al(AlSi3O10)(OH)2
mineral
Quartz fragment
Silicon Dioxide (SiO2)
mineral
K-Feldspar / Granite Fragment
Potassium Feldspar (Microcline/Orthoclase) with Quartz
igneous
Sodalite
Sodalite (Na8Al6Si6O24Cl2)
mineral
Vesicular Basalt / Scoria pebble
Extrusive igneous rock with amygdaloidal infilling
igneous
Granite / Igneous Rock Specimen
Phaneritic Igneous Rock
igneous
Amazonite
Microcline feldspar, KAlSi3O8
mineral
Granite Pebble
Intrusive Igneous Rock
igneous
Granite
Intrusive Igneous Rock
igneous
Granite
Intrusive Igneous Rock
igneous
Agate with Carnelian
Silicon Dioxide (SiO2)
gemstone
Quartz
Silicon Dioxide (SiO2)
mineral
Citrine
Silicon dioxide with iron impurities (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Granite
Granite, a coarse-grained felsic intrusive igneous rock composed mainly of quartz, feldspar, and mica
igneous
Granite
Felsic intrusive igneous rock
igneous
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Sodalite
Sodium Aluminum Silicate Chloride, Na4Al3(SiO43Cl
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Green Aventurine
Quartz with fuchsite inclusions (SiO2)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Optical Calcite
Calcium Carbonate (CaCO3)
mineral
Chalcopyrite
Copper Iron Sulfide (CuFeS2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral