Quartz Geode
Silicon Dioxide (SiO2)
mineral
Category
Mineral Specimen
Browse mineral specimen specimens identified by the Rock Identifier community.
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Gabbro
Gabbro
igneous
Pale green translucent mineral fragment
Indeterminate; possibly fluorite, calcite, or glassy quartz
mineral
Sandstone (Ferruginous)
Sandstone (clastic sedimentary rock, mainly SiO2 with iron oxide cement)
sedimentary
Sandstone
Sandstone (SiO2 dominated)
sedimentary
Ferruginous Quartz
Silicon Dioxide (SiO2) with Iron Oxide (Fe2O3) inclusions
mineral
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Kyanite in Quartz
Al2SiO5 in SiO2
metamorphic
Quartz Druze (Crystalline Quartz)
Silicon Dioxide (SiO2)
mineral
Smoky Quartz with Chert
Silicon Dioxide (SiO2)
mineral
Rock Fragment with Calcite/Quartz Vein
Polymictic Rock Fragment (SiO2 / CaCO3)
igneous
Mixed Rock and Mineral Collection
Various geological specimens
igneous, sedimentary, and metamorphic
Quartz (Iron-Stained)
Silicon Dioxide (SiO2)
mineral
Labradorite
Labradorite ((Ca, Na)(Al, Si)4O8)
mineral
Green Aventurine
Quartz (SiO2) with fuchsite inclusions
mineral
Ferruginous Quartz
Silicon Dioxide (SiO2) with Iron Oxide inclusions
mineral
Garnetiferous Pegmatite
Pegmatite with Almandine Garnet and Muscovite
igneous
Quartz
Silicon dioxide (SiO2)
mineral
Garden Quartz (Lodalite)
Silicon Dioxide with various mineral inclusions (SiO2)
mineral
Milky Quartz in Shale
Silicon Dioxide (SiO2) in sedimentary host rock
mineral
Note regarding baguette production (not a rock)
Digital text image - Somali language
not a rock
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Pink-gray granite
Granite; chiefly quartz, alkali feldspar, plagioclase, and biotite/hornblende
igneous
Sunstone Quartz / Aventurine Quartz
Silicon Dioxide (SiO2) with inclusions
mineral
Sandstone with Manganese Dendrites
Clastic Sedimentary Rock (SiO2 based with MnO2 inclusions)
sedimentary
Ferruginous Quartz
Quartz with Iron Oxide inclusions (SiO2 + Fe2O3)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Agate in Matrix
Silicon Dioxide (SiO2) within host rock
mineral
Fulgurite
Lechatelierite
mineral
Bloodstone
Chalcedony quartz variety (SiO2) with inclusions
mineral
Carnelian Agate
Silicon Dioxide (Chalcedony variety)
mineral
Precious Opal in Matrix
Hydrated Silica (SiO2·nH2O)
mineral
Azurite and Malachite
Azurite (Cu3(CO3)2(OH)2) and Malachite (Cu2CO3(OH)2)
mineral
Quartz with Inclusions
Silicon Dioxide (SiO2) with various mineral inclusions
mineral
Copper Ore (Chrysocolla/Malachite in host rock)
Hydrated copper phyllosilicate and copper carbonate hydroxide
mineral
Feldspar-rich Granite
Granite (primarily Orthoclase and Quartz)
igneous
Quartz Geode with Calcite/Siderite
Crystalline Silicon Dioxide (SiO2) with Carbonate inclusions
mineral
Banded Sandstone
Quartz Arenite (with iron oxide banding)
sedimentary
Tumbled Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Diamond
Natural Diamond (Carbon, C)
gemstone