Blue Quartz
Silicon Dioxide (SiO2) with inclusions
mineral
Category
Igneous, Sedimentary, Or Metamorphic (Mineral Based)
Browse igneous, sedimentary, or metamorphic (mineral based) specimens identified by the Rock Identifier community.
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Milky Quartz
Silicon Dioxide (SiO2)
mineral
Sodalite
Na8(Al6Si6O24)Cl2 (Sodium Aluminum Silicate Chloride)
mineral
Magnetite (Iron Ore)
Iron(II,III) oxide (Fe3O4)
mineral
Sandstone
Arenite (SiO2 based with various mineral cements)
sedimentary
Green Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Greenstone / Epidosite
Epidosite (primary minerals: Epidote and Quartz)
metamorphic
Muscovite Mica in Quartz
Potassium Aluminum Silicate Hydroxide (KAl2(AlSi3O10)(OH)2) and Silicon Dioxide (SiO2)
metamorphic
White Quartz
Silicon Dioxide (SiO2)
mineral
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
mineral
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Greenish Feldspathic Rock / Epidote Granite (Unakite-type or Epidote-bearing rock)
Epidotized Metamorphic/Igneous Rock
metamorphic
Magnetite Sand (Black Sand)
Magnetite (Fe3O4)
mineral
Fossil Shark Tooth
Odontaspididae (Sand Tiger Shark family)
fossil
Muscovite Mica
Muscovite - KAl2(AlSi3O10)(F,OH)2
mineral
Quartz (Small Fragment)
Silicon Dioxide (SiO2)
mineral
Limonite (Iron Stone)
Limonite (Hydrated Iron Oxide) - FeO(OH)·nH2O
mineral
Magnetite or Hematite Nodule
Iron Oxide (Fe3O4 or Fe2O3)
mineral
Conglomerate
Conglomerate (clastic sedimentary rock)
sedimentary
Magnetite / Lodestone
Magnetite (Fe3O4)
mineral
Magnetite / Hematite mix
Magnetite (Fe3O4) and Hematite (Fe2O3)
mineral
Massive White Quartz
Silicon Dioxide (SiO2)
mineral
Yellow Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Limonite (Iron Ore)
FeO(OH)·nH2O (Hydrous ferric oxide)
mineral
Labradorite
Plagioclase Feldspar (Na,Ca)(Al,Si)4O8
mineral
Citrine (Heat-treated Amethyst)
Silicon Dioxide (SiO2) with iron impurities
mineral
Pyrite
Iron Pyrite (FeS2)
mineral
Muscovite (Mica)
Muscovite - KAl2(AlSi3O10)(OH)2
Mineral
Magnetite (Lodestone)
Magnetite (Fe3O4)
mineral
Biotite Schist
Biotite Schist (predominantly K(Mg,Fe)3AlSi3O10(OH,F)2)
metamorphic
Sandstone (with Laminations)
Clastic sedimentary rock (primarily Quartz-based)
sedimentary
Hematite
Iron(III) oxide (Fe2O3)
mineral
Hematite (likely Botryoidal or Specularite variant)
Iron(III) oxide (Fe2O3)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Feldspar
KAlSi3O8 - NaAlSi3O8 - CaAl2Si2O8 (Feldspar group)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Raw Chunk)
Silicon Dioxide (SiO2)
mineral
Blue Apatite
Fluoroapatite (Ca5(PO4)3F)
mineral
Magnetite (Iron Ore)
Magnetite (Fe3O4)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Mixed Rock Collection (Pebbles and Stones)
Various geological specimens
igneous, sedimentary, and metamorphic