Aquamarine
Beryl (Be3Al2Si6O18 with Fe impurities)
mineral
Category
Igneous, Metamorphic, Sedimentary
Browse igneous, metamorphic, sedimentary specimens identified by the Rock Identifier community.
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Blue Apatite
Calcium Fluorophosphate (Ca5(PO4)3F)
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Orthoclase Feldspar
Potassium Feldspar (KAlSi3O8)
mineral
Black Tourmaline (Schorl)
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Rainbow Moonstone
White Labradorite (Plagioclase Feldspar), (Na,Ca)(Al,Si)4O8
gemstone
Sodalite
Sodalite (Na8(Al6Si6O24)Cl2)
mineral
Spessartine Garnet
Manganese aluminum silicate (Mn2+3Al2(SiO4)3)
mineral
Pyrite in Matrix (Gold-colored Chalcopyrite or Pyrite)
Iron Sulfide (FeS2) / Copper Iron Sulfide (CuFeS2)
mineral
Black Tourmaline
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Quartz with Mica/Host Rock
Silicon Dioxide (SiO2) with Phyllosilicates
mineral
Citrine
Silicon Dioxide (SiO2)
mineral
Amethyst
SiO2 (Silicon Dioxide with Iron impurities)
mineral
Tiny amber-colored crystal fragment
Indeterminate; possibly quartz, feldspar, mica, or a sulfide mineral
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz Pebble
Crystalline Silicon Dioxide (SiO2)
mineral
Rough Citrine Quartz
Citrine (Silicon Dioxide, SiO2 with iron impurities)
mineral
Milky Quartz
Crystalline Silicon Dioxide (SiO2)
mineral
White Quartz
Quartz (SiO2)
Mineral
Almandine Garnet
Almandine, Fe3Al2(SiO4)3
mineral
Almandine Garnet
Almandine, Fe3Al2(SiO4)3
mineral
Biotite / Black Mica
K(Mg,Fe)3(AlSi3O10)(F,OH)2
mineral
Blue Sapphire (in a faceted jewelry setting)
Corundum (Al2O3) with trace Iron and Titanium
mineral
Muscovite Mica
Muscovite (Potassium Aluminum Silicate) - KAl2(AlSi3O10)(F,OH)2
mineral
Quartz (Pebble)
Quartz (SiO₂)
Mineral
Muscovite mica
Muscovite, KAl₂(AlSi₃O₁₀)(OH)₂
mineral
Black Tourmaline
Schorl (Na(Fe²⁺)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄)
Mineral
Osumilite in Granite Matrix
(K,Na)(Fe,Mg)2(Al,Fe)3(Si,Al)12O30
mineral
Quartz (Milky Quartz)
Quartz (SiO2 - Silicon Dioxide)
Mineral
Epidote
Epidote Group (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))
metamorphic
Quartz Vein in Host Rock (Breccia/Rhyolite)
Silicon Dioxide (SiO2) with matrix
Mineral in Igneous/Sedimentary host
Unakite Epidote-Granite
Unakite (Epidotized Granite)
metamorphic
Ptygmatic Migmatite
Migmatite (consisting of Neosome and Paleosome fractions)
metamorphic
Banded gneiss pebble
Gneiss, typically quartz–feldspar–mica assemblage
metamorphic
Quartz Vein in Host Rock
Silicon Dioxide (SiO2) vein cutting through host rock
mineral
Milky and Ferruginous Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz with Iron Staining
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral