Clear Quartz
Silicon Dioxide (SiO2)
mineral
Category
Mixed (Igneous, Sedimentary, Metamorphic, And Minerals)
Browse mixed (igneous, sedimentary, metamorphic, and minerals) specimens identified by the Rock Identifier community.
Learn about Mixed (Igneous, Sedimentary, Metamorphic, And Minerals) in the encyclopedia
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Polished granite cobble
Granite, typically quartz–feldspar–biotite granite
igneous
Quartz (Pebble)
Silicon Dioxide (SiO2)
mineral
Conglomerate (Greenstone/Pebble Conglomerate)
Polymictic Conglomerate
sedimentary
Pyrite in Quartz Matrix
Iron Sulfide (FeS2) embedded in Silicon Dioxide (SiO2)
mineral
Quartz (Rose Quartz or Jasper variety)
Silicon Dioxide (SiO2)
mineral
Apatite
Fluorapatite / Chlorapatite (Ca5(PO4)3(F,Cl,OH))
mineral
Magnetic Sand Grain / Magnetite Pellet
Magnetite (Fe3O4)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Gneiss
Metamorphic Foliated Gneiss
metamorphic
Likely quartz-bearing mineral aggregate
Quartz (SiO₂), possibly mixed with mica or feldspar
mineral
Clear Quartz (Faceted)
SiO2 - Silicon Dioxide
gemstone
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Quartz
Silicon Dioxide (SiO2)
mineral
Garnet (likely Almandine, Pyrope, or a blend)
Garnet group minerals: X3Y2(SiO4)3, where X and Y represent various metal ions (e.g., Almandine: Fe3Al2(SiO4)3, Pyrope: Mg3Al2(SiO4)3)
Mineral
Magnetite (Iron Ore)
Magnetite (Fe3O4)
mineral
White Quartz
Silicon Dioxide (SiO2)
mineral
Diorite
Intermediate Phaneritic Igneous Rock
igneous
Quartz
Silicon Dioxide (SiO2)
mineral
Blue Quartz
Silicon Dioxide (SiO2) with inclusions
mineral
Blue Quartz
Silicon Dioxide (SiO2) with inclusions
mineral
Red Agate Sphere (or Banded Jasper/Agate)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
mineral
Quartz with Inclusions
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Inukshuk Rock Sculpture (composed of Granite, Slate, and Amethyst)
Silicon Dioxide (Amethyst portion, SiO2) with mixed silicate rock assemblage
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3(F,Cl,OH))
mineral
Magnetite (potentially Hematite)
Magnetite (Fe₃O₄)
mineral
Unakite (likely)
Epidote–pink feldspar–quartz rock; commonly termed unakite
metamorphic
Magnetite (Octahedral Crystal)
Magnetite (Fe3O4)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
sedimentary
Yellow Apatite
Fluorapatite (Ca5(PO4)3(F,Cl,OH))
mineral
Rhodonite
Rhodonite, manganese inosilicate — MnSiO₃; the specimen may include quartz, feldspar, and black manganese-oxide minerals in the matrix
mineral
Granite (Pink/Potassium Feldspar Granite)
Felsic Plutonic Rock (Potassium Feldspar, Quartz, Mica, and Amphibole)
igneous
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Magnetite (Iron Ore)
Magnetite (Fe3O4)
mineral
Asphalt Concrete
Bituminous conglomerate
sedimentary
Magnetite
Magnetite (Fe3O4)
mineral
Quartz Crystal Cluster / Quartzite
Silicon Dioxide (SiO2)
mineral
Assorted Tumbled Gemstones
Mixed oxides and silicates (including Quartz, Chalcedony, and Feldspar variants)
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Pegmatite with Quartz and Feldspar
Intrusive Igneous Rock
igneous