Tumbled blue stone, possibly sodalite or blue quartz
Indeterminate from the photograph; possibilities include sodalite (Na₈Al₆Si₆O₂₄Cl₂) or blue quartz (SiO₂)
mineral
Category
Metamorphic Or Igneous (Context Dependent)
Browse metamorphic or igneous (context dependent) specimens identified by the Rock Identifier community.
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Magnetite / Iron Ore
Magnetite (Fe3O4)
mineral
Emerald in Matrix (Quartz/Schist)
Beryl (Be₃Al₂Si₆O₁₈) with Chromium/Vanadium impurities
mineral
Dumortierite Quartz
Dumortierite (Al7BO3(SiO4)3O3) within Quartz (SiO2)
igneous
Biotite Mica Schist
Metamorphic Rock containing Biotite K(Mg,Fe)3AlSi3O10(OH)2
metamorphic
Feldspar (Microcline / Orthoclase)
Potassium Feldspar (KAlSi3O8)
mineral
Clear Quartz (Faceted)
Silicon Dioxide (SiO2)
gemstone
Quartz (Tumbled)
SiO2 (Silicon Dioxide)
mineral
Quartz (Citrine or Iron-Stained)
SiO2
mineral
Quartz pebble
Silicon dioxide (SiO2)
mineral
Citrine
Silicon dioxide (SiO2)
gemstone
Natural Gemstone Cabochons (Ruby, Moonstone, Emerald, Citrine)
Ruby (Al2O3:Cr), Moonstone (KAlSi3O8), Emerald (Be3Al2(SiO3)6:Cr), Citrine (SiO2)
mineral
Apatite
Ca5(PO4)3(F,Cl,OH)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Blue Apatite
Apatite Group (Ca5(PO4)3(F,Cl,OH))
mineral
Quartz fragment
Silicon Dioxide (SiO2)
mineral
Blue Apatite
Ca5(PO4)3(F,Cl,OH)
mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Chert (often called Flint in archaeological contexts)
Silicon Dioxide (SiO2)
sedimentary
Greenish Feldspathic Rock / Epidote Granite (Unakite-type or Epidote-bearing rock)
Epidotized Metamorphic/Igneous Rock
metamorphic
Likely garnet crystal
Garnet-group silicate; species cannot be determined from the image
mineral
Sodalite
Sodalite, Na8(Al6Si6O24)Cl2
Mineral
Gneiss
Metamorphic Gneiss
metamorphic
Weathered rock fragment (likely granite or granitic gneiss)
Undetermined felsic rock; possibly quartz–feldspar granite
igneous
Fossiliferous limestone fragment
Calcitic limestone; mainly calcium carbonate (CaCO₃), possibly with shell or coral debris
sedimentary
Foliated metamorphic rock, likely mica schist
Mica schist, mainly quartz–feldspar–mica assemblage
metamorphic
Greenstone or Epidote-rich rock
Epidote or Chlorite schist/greenstone
metamorphic
Sapphire (Corundum variety)
Sapphire (Al₂O₃)
Mineral
Venetian Gold Granite
Phaneritic Felsic Igneous Rock (Granite)
igneous
Muscovite Mica
KAl2(AlSi3O10)(OH)2
mineral
Moonstone (Feldspar)
Orthoclase or Oligoclase (KAlSi3O8)
mineral
Garnet (Almandine/Pyrope series)
Silicate mineral (Almandine: Fe3Al2Si3O12; Pyrope: Mg3Al2Si3O12)
mineral
Chalcopyrite (Peacock Ore)
Copper Iron Sulfide (CuFeS2)
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Sodalite
Na8(Al6Si6O24)Cl2
mineral
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Epidote
Epidote (Ca2(Al, Fe)3(SiO4)3(OH))
mineral
Magnetite (Iron Ore)
Magnetite (Fe3O4)
mineral
Likely quartz-bearing rock fragment
Quartz (SiO₂), possibly with iron-oxide staining or other mineral inclusions
mineral
Milky quartz
Quartz, silicon dioxide (SiO₂)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Raw and Water-worn)
Silicon Dioxide (SiO2)
mineral