Magnetite (Iron Ore)
Magnetite (Fe3O4)
mineral
Category
Igneous, Metamorphic, And Sedimentary
Browse igneous, metamorphic, and sedimentary specimens identified by the Rock Identifier community.
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Clear Quartz
Silicon Dioxide (SiO2)
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Quartz (Iron-Stained)
Silicon Dioxide (SiO2)
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Clear Quartz Crystal
Silicon Dioxide (SiO2)
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Zoisite with Ruby
Anyolite (Calcium aluminum hydroxy silicate with Corundum) Ca2Al3(SiO4)3(OH)
metamorphic
Pyrite-rich Ore
Pyrite (FeS2) with secondary minerals
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Black Onyx
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Pyrite (Fools Gold)
Iron Disulfide (FeS2)
mineral
Blue Apatite
Fluoroapatite (Ca5(PO4)3F)
mineral
Magnetite (Small Granule)
Magnetite (Fe3O4)
mineral
Pyrite in Matrix
Iron Sulfide (FeS2)
mineral
Quartz (Milky Quartz)
Quartz (Silicon Dioxide, SiO2)
mineral
Magnetite (Lodestone)
Magnetite (Fe3O4)
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Magnetic Sand Grain / Magnetite Pellet
Magnetite (Fe3O4)
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Feldspar (specifically Orthoclase or Plagioclase)
Potassium Aluminum Silicate (KAlSi3O8) or Sodium/Calcium Aluminum Silicate
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Greenish Metamorphic Rock (likely containing epidote or chlorite)
Metamorphic rock, possibly epidosite or greenstone
Metamorphic
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Optical Calcite
Calcium Carbonate (CaCO3)
mineral
Mixed Mineral Collection
Multi-mineral Assemblage (Quartz, Jasper, Obsidian, Pyrite, etc.)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Graphite
Graphite (C)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Quartz (Milky/Common Quartz)
Silicon Dioxide (SiO2)
mineral
Magnetite or Hematite Nodule
Iron Oxide (Fe3O4 or Fe2O3)
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Yellow Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Specular Hematite
Hematite (Fe2O3)
mineral
Garnet Gneiss
Garnetiferous quartzo-feldspathic gneiss
metamorphic
Ruby Zoisite
Anyolite (Calcium aluminium silicate with Chromium/Corundum inclusions)
metamorphic
Garnet
Garnet (X3Y2(SiO4)3)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Green Opal
Hydrated Silica (SiO2·nH2O)
mineraloid
Amethyst and Calcite collection
Silicon Dioxide (SiO2) and Calcium Carbonate (CaCO3)
mineral