Quartz pebble
Silicon dioxide (SiO2)
mineral
Category
Mineral (Found In Igneous And Metamorphic Rocks)
Browse mineral (found in igneous and metamorphic rocks) specimens identified by the Rock Identifier community.
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Potassium Feldspar (Microcline / Orthoclase)
KAlSi3O8
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Ruby (varieties of Corundum)
Aluminum oxide (Al2O3) with Chromium traces
mineral
Quartz (River Pebble)
Quartz (Silicon Dioxide, SiO2)
mineral
Pyrite with Quartz
Iron Sulfide (FeS2) with Silicon Dioxide (SiO2)
mineral
Quartz
SiO2 (Silicon Dioxide)
mineral
Milky quartz pebble
Quartz (silicon dioxide, SiO₂)
mineral
Milky quartz
Quartz (silicon dioxide, SiO₂)
mineral
Labradorite
(Ca,Na)(Al,Si)4O8 (Plagioclase Feldspar)
mineral
Clear Quartz
Silicon dioxide (SiO2)
mineral
Magnetite (Iron Ore)
Magnetite (Fe3O4)
mineral
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Garnet (Almandine/Pyrope series)
Silicate mineral (Almandine: Fe3Al2Si3O12; Pyrope: Mg3Al2Si3O12)
mineral
Citrine
Citrine (Silicon Dioxide - SiO2)
mineral
Quartz with Inclusions
Silicon Dioxide (SiO2)
mineral
Peacock Ore
Bornite (Cu5FeS4)
mineral
Milky Quartz Pebble with Iron staining
Silicon Dioxide (SiO2)
mineral
Muscovite Mica
Muscovite (KAl2(AlSi3O10)(OH)2)
mineral
Fluorite with Rhodochrosite
Fluorite (CaF2) and Rhodochrosite (MnCO3)
Mineral
Magnetite (potentially Hematite)
Magnetite (Fe₃O₄)
mineral
Polished smoky quartz crystal point
Quartz (SiO₂), likely iron-colored or smoky quartz with milky inclusions
mineral
Milky Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite in Quartz Matrix
Iron Sulfide (FeS2) embedded in Silicon Dioxide (SiO2)
mineral
Amethyst
Amethyst (Silicon Dioxide with iron impurities, SiO2)
mineral
Zoisite with Ruby (Anyolite)
Zoisite – Ca2Al3(SiO4)3(OH) with inclusions of Ruby (Al2O3:Cr)
metamorphic
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
mineral
Milky quartz (rough quartz fragment)
Quartz, SiO₂
mineral
Chrysocolla
Hydrated copper phyllosilicate, Cu2-xAlx(H2-xSi2O5)(OH)4·n(H2O)
mineral
Black Tourmaline (Schorl)
Schorl (Na(Fe²⁺)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄)
mineral
Labradorite (likely)
(Ca,Na)(Al,Si)4O8
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
Milky Quartz (or Iron-Stained Quartz)
Quartz (Silicon Dioxide, SiO2)
mineral
Mixed Mineral Collection (with Titanium Aura Quartz)
Silicon Dioxide (SiO2) with metallic coatings and various silicates
mineral
Moonstone (Feldspar)
Orthoclase (KAlSi3O8) or Albite (NaAlSi3O8)
mineral
White Sapphire
Corundum (Al2O3)
mineral
Assorted Decorative Tumbled Stones (Quartz, Sodalite, Aventurine, Calcite)
Mixed Silicates and Carbonates (SiO2, Na8(Al6Si6O24)Cl2, CaCO3)
mineral
Yellow Quartz (Citrine or Iron-stained Quartz)
Silicon Dioxide (SiO2)
mineral
Magnetite
Magnetite (Fe3O4)
mineral
Small quartz crystal (likely milky quartz)
Quartz, silicon dioxide (SiO₂)
mineral