Milky Quartz
Crystalline Silicon Dioxide (SiO2)
mineral
Category
Man Made Object (Metal Alloy)
Browse man made object (metal alloy) specimens identified by the Rock Identifier community.
Learn about Man Made Object (Metal Alloy) in the encyclopedia
View all →
Quartz Vein / Milky Quartz
Silicon Dioxide (SiO2)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Barite
Barium Sulfate (BaSO4)
mineral
Likely small metallic meteorite fragments
Unclassified iron or stony-iron meteorite; mineralogy cannot be confirmed from the image
meteorite
Native Copper
Native Copper (Cu)
mineral
Pyrite (on host rock)
Iron Sulfide (FeS2)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Moqui Marble (Ironstone Concretion)
Goethite-Hematite Sandstone Concretion
sedimentary
Blue Goldstone
Aventurine Glass (SiO2 with Co and metallic inclusions)
mineral (synthetic glass)
Bornite (Peacock Ore)
Bornite (Cu5FeS4)
mineral
Green Fluorite
Calcium fluoride (CaF2)
mineral
Serpentinite
Serpentinite (composed primarily of minerals in the Serpentine group)
metamorphic
Lepidolite
K(Li,Al)3(Al,Si,3O10)(F,OH)2
mineral
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Limestone pebble
Sedimentary rock composed mainly of calcium carbonate (CaCO3)
sedimentary
Limestone
Calcium Carbonate (CaCO3)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Cleavable Calcite
Calcium Carbonate (CaCO3)
mineral
Quartzite
Quartzite (chiefly SiO2)
metamorphic
Quartzite Pebble
Quartzite (Silicon Dioxide, SiO2)
metamorphic
Celestine (Celestite)
Strontium sulfate (SrSO4)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartzite
Quartzite (SiO2)
metamorphic
Sandstone (Ferruginous)
Arenite with Iron-Oxide Cement
sedimentary
Quartzite
Quartzite (SiO2)
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Bornite
Bornite (Cu5FeS4)
mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Carnelian
Carnelian (a variety of Chalcedony, SiO2)
Mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite (on Quartz/Sulfide matrix)
Iron Sulfide (FeS2)
mineral
Basalt
Mafic volcanic rock (primarily plagioclase feldspar and pyroxene)
igneous
Pyrite
Iron Disulfide (FeS2)
mineral
Anthracite Coal
Anthracite (Carbon-based sedimentary rock typically classified as metamorphic)
metamorphic
Magnetite
Magnetite (Fe3O4)
mineral
Banded Iron Formation (BIF)
Banded Iron Formation (Fe2O3 + SiO2)
sedimentary
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Serpentinite (likely)
Serpentinite, dominated by serpentine-group minerals (antigorite, lizardite, chrysotile), commonly with magnetite and relic olivine/pyroxene
metamorphic
Fluorite
Calcium Fluoride (CaF2)
mineral