Clear Quartz
Silicon Dioxide (SiO2)
mineral
Category
Igneous
Browse igneous specimens identified by the Rock Identifier community.
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Chalcopyrite
Copper Iron Sulfide (CuFeS2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Pyrite Nodules / Weathered Pyrite
Iron Sulfide (FeS2)
mineral
Granite with Quartz Vein
Granite
Igneous
Granite or Pegmatite in host rock
Granitoid / Felsic Intrusive Rock
Igneous
Aventurine (likely Green Aventurine)
Silicon Dioxide (SiO2) with mineral inclusions
Mineral/Mineraloid within a rock matrix
Weathered igneous rock fragment, possibly granite or granitic gneiss
Indeterminate; likely quartz–feldspar–mica aggregate (granite), possibly foliated gneiss
igneous
Granite-like igneous rock
Likely medium-grained granite or granodiorite; quartz–feldspar–mica aggregate
igneous
Porphyritic Igneous Rock / Rhyolite Porphyry
Porphyritic volcanic rock
igneous
Porphyritic Igneous Rock / Granite or Rhyolite Porphyry
Porphyritic intrusive/extrusive igneous rock
igneous
Porphyritic Igneous Rock / Porphyry
Porphyry (Plagioclase/Quartz phenocrysts in a finer-grained groundmass)
igneous
Likely porphyritic igneous rock (possibly granite or rhyolite)
Quartz–feldspar–mica aggregate; exact identification requires a fresh surface and tests
igneous
Possible dark igneous rock
Indeterminate; likely basalt or fine-grained mafic rock
igneous
Banded Igneous Dike Rock
Intrusive igneous rock with felsic/mafic banding
igneous
Porphyritic Igneous Rock / Basalt or Andesite Xenolith in Granite or Quartzite
Silicate rock with contrasting xenolith/inclusion
igneous
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Porphyritic basalt or andesite cobble
Fine-grained volcanic rock, likely plagioclase–pyroxene basalt/andesite
igneous
Granite Pebble (Pink/Orthoclase Granite)
Granite (rich in Potassium Feldspar / Orthoclase)
igneous
Granite (Orthoclase rich)
Granite (composed primarily of Quartz and Potassium Feldspar KAlSi3O8)
igneous
Quartz pebble with iron staining
Silicon dioxide (SiO2) with iron oxide inclusions
mineral
Blue Apatite
Fluorapatite / Apatite group (Ca5(PO4)3(F,Cl,OH))
mineral
Quartz pebble
Silicon dioxide (SiO2)
mineral
Blue Apatite
Apatite (Ca5(PO4)3(F,Cl,OH))
mineral
Sugilite
Sugilite (KNa2(Fe,Mn,Al)2Li3Si12O30)
mineral
Green Aventurine
SiO2
mineral
Peacock Ore
Bornite (Cu5FeS4)
mineral
Basalt with Granite Inclusions (Xenolith)
Mafic Igneous Rock (Basalt) with Felsic Igneous Inclusion (Granite)
igneous
Magnetite
Iron(II,III) oxide (Fe3O4)
mineral
Likely clear quartz pebble or glassy quartz fragment
Quartz (silicon dioxide, SiO₂)
mineral
Milky quartz
Quartz (SiO₂), likely massive milky quartz with minor iron-oxide staining and inclusions
mineral
Milky Quartz with Matrix
Silicon Dioxide (SiO2)
mineral
Sodalite
Na8(Al6Si6O24)Cl2
mineral
Magnetite
Magnetite (Iron(II,III) oxide, Fe3O4)
mineral
Diorite with Quartz Veins
Diorite
igneous
Basalt with Quartz Veins
Amygdaloidal Basalt (matrix) with Crystalline SiO2 (veins)
igneous
Polished orbicular stone, likely granite or diorite
Granite–diorite, composed mainly of feldspar, quartz, and dark amphibole/biotite
igneous
Biotite Mica Schist
Metamorphic Rock containing Biotite K(Mg,Fe)3AlSi3O10(OH)2
metamorphic
Dalmatian Jasper
Peralkaline Rhyolite (composed of Quartz, Feldspar, and Arfvedsonite)
igneous
Granite
Granite (Phaneritic intrusive igneous rock)
igneous
Dalmatian Jasper (Dalmatian Stone)
Perthitic Feldspar with Arfvedsonite/Riebeckite
igneous
Granite
Phaneritic Igneous Rock (composed primarily of Quartz, Alkali Feldspar, and Plagioclase)
igneous