Biotite on Quartz
Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2) and 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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Pink Quartz
Silicon Dioxide (SiO2)
mineral
Magnetite
Magnetite (Iron(II,III) oxide, Fe3O4)
mineral
Opalite
Synthetic Glass, SiO2 base with metallic inclusions
mineraloid (synthetic)
Blue Apatite
Apatite, Ca5(PO4)3(F,Cl,OH)
mineral
Magnetite
Iron(II,III) oxide (Fe3O4)
mineral
Magnetite (Iron Ore)
Magnetite (Fe3O4)
mineral
Magnetite (Lodestone)
Magnetite (Fe3O4)
mineral
Magnetite
Magnetite (Fe3O4)
mineral
Epidote
{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
mineral
Greenschist
Greenschist (containing Chlorite, Actinolite, and Epidote)
metamorphic
Pyrite in Matrix
Iron Sulfide (FeS2)
mineral
Feldspar (Plagioclase / Potassium Feldspar)
Feldspar Group (KAlSi3O8 - NaAlSi3O8 - CaAl2Si2O8)
mineral
Quartz Heart or Arrowhead Shape
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Faceted)
Silicon dioxide (SiO2)
gemstone
Quartz pebble
SiO2, Quartz
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Apatite
Calcium phosphate fluoride/chloride, Ca5(PO4)3(F,Cl,OH)
mineral
Apatite
Calcium phosphate fluoride/chloride, Ca5(PO4)3(F,Cl,OH)
mineral
Moonstone
Orthoclase (KAlSi3O8)
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Blue Apatite
Calcium Fluorophosphate - Ca5(PO4)3F
mineral
Pale greenish quartz-bearing rock, possibly serpentine or altered feldspar
Tentatively serpentinite-related rock (serpentine-group minerals) or altered granitic material; identification is uncertain from the photograph
metamorphic
Sunstone and Garnet
Plagioclase Feldspar ((Na,Ca)(Al,Si)4O8) and Almandine Garnet (Fe3Al2(SiO4)3)
gemstone
Goldstone
N/A (Synthetic Glass with Copper Inclusions)
Manufactured Glass
Sunstone / Peach Moonstone (Feldspar variety)
Potassium Aluminum Silicate (KAlSi3O8)
mineral
Magnetite / Ironstone
Magnetite (Fe3O4)
mineral
Quartz pebble
Silicon dioxide (SiO2)
mineral
Clear Quartz (Faceted) or Cubic Zirconia / Glass imitation
SiO2 (if Quartz), ZrO2 (if Cubic Zirconia)
mineral
Sapphire
Corundum (Al2O3)
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3(F,Cl,OH))
mineral
Blue Apatite
Ca5(PO4)3(F,Cl,OH)
mineral
Yellow Apatite
Fluorapatite (Ca5(PO4)3(F,Cl,OH))
mineral
White Sapphire
Corundum (Al2O3)
mineral
Blue Apatite
Fluorapatite / Apatite Group Ca5(PO4)3(F,Cl,OH)
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Quartz Vein in Host Rock
Silicon Dioxide (SiO2)
mineral
Blue gemstone, likely iolite or blue sapphire
Iolite (cordierite, Mg₂Al₄Si₅O₁₈) or corundum (sapphire, Al₂O₃)
gemstone
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
mineral
Green Chalcedony (Batu Akik)
Silicon Dioxide (SiO2)
gemstone
Pyrite (Fools Gold)
Iron Disulfide (FeS2)
mineral