Quartz
Silicon Dioxide (SiO2)
mineral
Category
Mixed: Igneous And Sedimentary
Browse mixed: igneous and sedimentary specimens identified by the Rock Identifier community.
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Pyrite
Iron Sulfide (FeS2)
mineral
Basalt (potential Glacial Erratic)
Extrusive Mafic Volcanic Rock (Basalt)
igneous
Black Tourmaline (Schorl)
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Sapphire in a ring
Corundum (Al2O3)
mineral
Dalmatian Jasper
Peralkaline rhyolite
igneous
Sand Grain (Silica/Quartz Grain)
Silicon Dioxide (SiO2)
sedimentary
Foliated Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Milky Quartz
Quartz (SiO2)
mineral
Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Faceted Clear Quartz
Crystalline Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Raw Fluorite
Calcium Fluoride (CaF2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Orange Calcite
Calcium Carbonate (CaCO3)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
White Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Gneiss
Gneiss
metamorphic
Gneiss
Foliated Metamorphic Gneiss
metamorphic
Clear Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz (White Pebble) and Sandstone (Brown/Tan Fragments)
Silicon Dioxide (SiO2) for the white pebble
mineral and sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Quartz (Iron-stained)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Agate (specifically a small Chalcedony nodule)
Agate (Cryptocrystalline variety of Quartz, SiO2)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Granite Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Pyrite
Iron Sulfide (FeS2)
mineral
Clear Quartz (Rock Crystal)
Quartz (Silicon Dioxide, SiO2)
mineral
Copper and Quartz beads
Native Copper (Cu) and Crystalline Quartz (SiO2)
mineral
Pyrite (Fools Gold)
Iron Sulfide (FeS2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Blue Apatite
Apatite (Calcium Phosphate) - Ca5(PO4)3(F,Cl,OH)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Optical Calcite (Iceland Spar)
Calcium Carbonate (CaCO3)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Gneiss (Gneissic Granite)
Gneiss
metamorphic
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Banded Gneiss
Gneiss (complex metamorphic silicate rock)
metamorphic