Ruby in Matrix
Corundum (Al2O3)
mineral
Category
Igneous
Browse igneous specimens identified by the Rock Identifier community.
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Carnelian Agate
Silicon Dioxide (SiO2) with iron oxide impurities
mineral
Amethyst (as seen in jewelry)
Silicon Dioxide (SiO2) with iron impurities
mineral
Pyrite in Matrix
Iron Sulfide (FeS2)
mineral
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Quartz (Smoky/Grey variety)
Silicon Dioxide (SiO2)
mineral
Optical Calcite (Iceland Spar)
Calcite (Calcium Carbonate, CaCO3)
mineral
Magnetite (in matrix)
Magnetite (Fe3O4)
mineral
Labradorite
Labradorite ((Ca, Na)(Al, Si)4O8)
mineral
Smoky Quartz
Smoky Quartz (Silicon Dioxide, SiO2)
mineral
Carnelian (Red Chalcedony)
SiO2 (Silicon Dioxide) with Iron Oxide impurities
mineral
Ruby (Raw Corundum)
Corundum (Al2O3) with Chromium traces
mineral
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Amazonite
Microcline (KAlSi3O8)
mineral
Nephrite Jade
Ca2(Mg,Fe)5Si8O22(OH)2 (Tremolite-Actinolite series)
metamorphic
Quartz (Milky or White Quartz)
Silicon Dioxide (SiO2)
mineral
Amethyst (Pale/Light Variety)
Quartz (Silicon Dioxide) with Iron impurities - SiO2
mineral
Banded Agate (specifically Black Sardonyx/Onyx variety)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Native Gold (in Jewelry)
Gold (Au)
mineral
Gneiss
Gneiss
metamorphic
Eudialyte
Na15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2
mineral
Moonstone
Orthoclase Feldspar ((K,Na)AlSi3O8)
mineral
Gneissic Schist
Gneiss-schist (Metamorphic rock)
metamorphic
Chalcedony (Quartz Var.)
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Moonstone (Adularia)
Potassium aluminum silicate (KAlSi3O8)
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Chalcedony (Agate/Carnelian)
Cryptocrystalline Quartz (SiO2)
mineral
Chalcopyrite
Chalcopyrite (CuFeS2)
mineral
Milky Quartz with Iron Inclusions
Silicon Dioxide (SiO2)
mineral
Quartz with Muscovite Mica
SiO2 with KAl2(AlSi3O10)(OH)2
mineral group
Garnet
Almandine-Pyrope group, X3Y2(SiO4)3
mineral
Greenstone
Greenschist / Meta-basalt
metamorphic
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite
Pyrite (Iron Disulfide), FeS2
Mineral
Mixed Gemstone Bracelet
Mixed natural minerals and rocks (e.g., Rhodonite, Malachite, Sodalite, Rose Quartz, Black Tourmaline, Quartz/Chalcedony variants)
Mineral/Rock assemblage
Pink Granite
Phaneritic Felsic Igneous Rock (high K-feldspar)
igneous
Pink Granite
Phaneritic intrusive igneous rock (rich in Potassium Feldspar)
igneous
Granite
Intrusive Felsic Igneous Rock (primarily Quartz and Feldspar)
igneous