Mixed river pebbles and quartz-rich specimens
Polymictic fluvial gravel; likely quartz, quartzite, chert, and weathered feldspathic rocks
sedimentary
Category
Mixed (Sedimentary, Igneous, And Metamorphic)
Browse mixed (sedimentary, igneous, and metamorphic) specimens identified by the Rock Identifier community.
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Citrine
Silicon dioxide (SiO2)
mineral
Jasper and Basalt (Mixed Breccia or Chert)
Silicon Dioxide (SiO2) with Ferromagnesian silicates
sedimentary and igneous (mixed)
Asphalt Concrete
Bituminous Concrete / Asphaltic Composite
not a natural rock (man-made composite)
Black Tourmaline (Schorl)
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Mixed Agate and Lapis Lazuli Bracelet
Chalcedony (SiO2) and Lapis Lazuli (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2
sedimentary and metamorphic
Quartz pebble in concrete
Quartz (SiO₂), embedded in Portland-cement concrete
mineral
Cobalt Blue Glass / Cullet Glass
Silicon dioxide (Amorphous man-made glass)
mineral
Magnetite
Iron(II,III) oxide (Fe3O4)
mineral
Magnetite / Ironstone
Magnetite (Fe3O4)
mineral
Greywacke (River Pebble)
Greywacke sandstone with quartz veining
sedimentary
Azurite and Malachite
Cu3(CO3)2(OH)2 (Azurite) / Cu2CO3(OH)2 (Malachite)
mineral
Chrysocolla in Matrix
Chrysocolla (Cu,Al)2H2Si2O5(OH)4·nH2O
mineral
Galena
Lead Sulfide (PbS)
mineral
Quartz pebble
Silicon dioxide (SiO2)
mineral
Blue Apatite
Apatite (Ca5(PO4)3(F,Cl,OH))
mineral
Green Aventurine
SiO2
mineral
Milky Quartz
Quartz (SiO2)
mineral
Clear Quartz
Silicon dioxide (SiO2)
mineral
Zoisite with Ruby (Anyolite)
Zoisite – Ca2Al3(SiO4)3(OH) with inclusions of Ruby (Al2O3:Cr)
metamorphic
Black Tourmaline (Schorl)
Schorl (Na(Fe^2+)3Al6(Si6O18)(BO3)3)(OH)3(OH))
mineral
River Pebbles (White Quartz and Basalt mix)
Mixed Clastic Sedimentary Assemblage (SiO2 and Mafic Volcanics)
sedimentary
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Mixed River Pebbles (Jasper, Hematite, and Quartzites)
Silicon dioxide (Jasper/Quartz) and Iron oxide (Hematite)
sedimentary
Magnetite
Magnetite (Fe3O4)
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Conglomeratic sandstone or breccia
Lithic arkose / polymictic conglomeratic sandstone
sedimentary
Mixed River Pebbles and Rock Collection
Polymictic lithic conglomerate, sandstone, and quartz pebbles
sedimentary
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Blue Apatite
Apatite, Ca5(PO4)3(F,Cl,OH)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Smoky/Brown variety)
Silicon dioxide (SiO2)
mineral
Blue Apatite
Calcium Fluorophosphate - Ca5(PO4)3F
mineral
Magnetite (Iron Ore)
Magnetite (Fe3O4)
mineral
Agate (Brecciated / Moss Agate with Jasproid Inclusions)
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Rainbow Moonstone (White Labradorite)
Labradorite (White varieties with Schiller effect), (Na,Ca)(Al,Si)4O8
gemstone
Blue Apatite
Ca5(PO4)3(F,Cl,OH)
mineral