Milky Quartz
Silicon Dioxide (SiO2)
mineral
Category
Igneous, Sedimentary, Metamorphic, Mineral, Gemstone, Fossil, Or Meteorite
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Learn about Igneous, Sedimentary, Metamorphic, Mineral, Gemstone, Fossil, Or Meteorite in the encyclopedia
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Clear Quartz Crystal
Silicon Dioxide (SiO2)
mineral
Ironstone Concretion (Boxwork)
Siderite-Limonite Concretion (FeO(OH)·nH2O)
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Ironstone Concretion
Ironstone (Siderite/Limonite/Goethite)
sedimentary
Peridot (Olivine)
Magnesium Iron Silicate (Mg, Fe)2SiO4
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Tumbled basalt (vesicular volcanic stone)
Basalt, a fine-grained mafic volcanic rock composed chiefly of plagioclase feldspar and pyroxene, with possible olivine and iron oxides
igneous
Quartz
Silicon Dioxide (SiO2)
mineral
Olivine (Peridot)
Magnesium Iron Silicate ((Mg, Fe)2SiO4)
mineral
Quartz
SiO2
mineral
Magnetite (Iron Ore)
Magnetite (Fe3O4)
mineral
White Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Tektite (Indochinite)
Tektite (Natural silica glass)
igneous
Weathered limestone or calcareous tufa
Calcite-rich carbonate rock, primarily CaCO₃ (often micritic limestone or travertine/tufa)
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Magnetite-rich iron ore
Magnetite (Fe₃O₄), possibly with hematite and silicate matrix
mineral
Sandstone Concretion
Ferruginous Sandstone Concretion
sedimentary
Red coral (coral beads)
Precious coral, usually Corallium spp.; composed primarily of calcium carbonate (calcite)
gemstone
Quartz Crystal
Silicon Dioxide (SiO2)
mineral
White Quartz
Silicon Dioxide (SiO2)
mineral
Clear Quartz Crystal
Silicon Dioxide (SiO2)
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Crystalline fragment)
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Granitic Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Pallasite Meteorite
Pallasite (ST-class)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral