Black Tourmaline
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Category
Igneous And Metamorphic
Browse igneous and metamorphic specimens identified by the Rock Identifier community.
Learn about Igneous And Metamorphic in the encyclopedia
View all →
Yellow Quartz
Silicon Dioxide (SiO2)
mineral
Citrine
Silicon Dioxide (SiO2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Citrine Quartz
Silicon Dioxide (SiO2)
mineral
Tumbled white feldspar, possibly moonstone
Likely potassium feldspar (orthoclase, KAlSi₃O₈); identification is tentative from the image
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron sulfide (FeS2)
mineral
Citrine Quartz
Silicon Dioxide (SiO2) with ferric iron impurities
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Citrine
Silicon Dioxide (Quartz var. citrine), SiO2
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Smoky Quartz (with Iron Inclusions)
Silicon Dioxide (SiO2)
mineral
Blue Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Black Tourmaline (Schorl)
Schorl (Complex sodium iron aluminum borosilicate)
mineral
Possible magnetite fragment
Magnetite (Fe₃O₄), tentative identification
mineral
Clear Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Small dark metallic-looking mineral grain, possibly magnetite
Magnetite (Fe₃O₄), tentative identification
mineral
Quartz pebble
Silicon dioxide (SiO2)
sedimentary
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz pebble
Silicon dioxide (SiO2)
sedimentary
Quartz pebble
Silicon dioxide (SiO2)
sedimentary
Quartz Pebble
Silicon dioxide (SiO2)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Rounded gray pebble, likely quartz-rich stone
Indeterminate; possibly quartzite or a weathered granitic pebble
rock
Smoky Quartz
Silicon Dioxide (SiO2)
gemstone
Quartz Pebble (Iron-Stained Quartz)
Silicon Dioxide (SiO2)
mineral
Milky Quartz with Iron Staining
Quartz (SiO2)
mineral
Strawberry Quartz (Aventurine)
Silicon Dioxide with Hematite/Lepidocrocite inclusions (SiO2)
mineral
Magnetic Sand Grain / Magnetite Pellet
Magnetite (Fe3O4)
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Labradorite
(Na, Ca)(Si, Al)4O8
mineral
Pyrite Cube in Matrix
Iron Sulfide (FeS2)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Citrine
Silicon Dioxide (SiO2)
mineral
Assorted Decorative Tumbled Stones (Quartz, Sodalite, Aventurine, Calcite)
Mixed Silicates and Carbonates (SiO2, Na8(Al6Si6O24)Cl2, CaCO3)
mineral
Likely milky quartz
Quartz, silicon dioxide (SiO₂)
mineral
Small polished gemstone chips, likely mixed quartz varieties
Quartz (SiO₂), possibly including smoky quartz and other varieties; exact identification is uncertain from the image
gemstone
Smoky Quartz
Silicon Dioxide (SiO2)
mineral