Quartz (Small Pebble)
Silicon Dioxide (SiO2)
mineral
Category
Sedimentary And Igneous
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Pyrite in Matrix
Iron Sulfide (FeS2)
mineral
Magnetite / Iron Ore
Magnetite (Fe3O4)
mineral
Quartz Sand
Silicon Dioxide (SiO2)
sedimentary
Quartz Sand
Silicon Dioxide (SiO2)
sedimentary
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Mica / Muscovite or Biotite
Phyllosilicate mineral group (e.g., KAl2(AlSi3O10)(OH)2)
mineral
Banded Gneiss
Gneiss
metamorphic
Quartz (Peach/Orange)
Silicon Dioxide (SiO2)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Quartz Pebble (Geode Nodules / Stream-Rounded Quartz)
Silicon Dioxide (SiO2)
mineral
Gneiss
Metamorphic Gneiss
metamorphic
Epidote (Unakite component) / Green Quartzite
Ca2(Al,Fe)3(SiO4)3(OH)
metamorphic
Gneiss
Foliated Metamorphic Rock
metamorphic
Banded Gneiss
Gneiss (SiO2 enriched metamorphic rock)
metamorphic
Gneiss (or Granite Gneiss)
Metamorphic rock rich in quartz, feldspar, and biotite/amphibole
metamorphic
Gneiss
Gneiss (Foliated Metamorphic Rock)
metamorphic
Carnelian Agate
Chalcedony (SiO2) with iron oxide inclusions
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Chalcedony (Dyed Agate and Citrine-style Quartz)
Silicon Dioxide (SiO2)
gemstone
Honey Calcite
Calcium Carbonate (CaCO3)
mineral
Chalcedony/Agate
Cryptocrystalline Silica (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Quartz (Common or Milky)
Silicon Dioxide (SiO2)
mineral
Gneiss
Metamorphic Gneiss (High-grade regional metamorphism)
metamorphic
Pyrite (Fool's Gold) in Matrix
Iron Disulfide (FeS2)
mineral
Blue Chalcedony
Cryptocrystalline Quartz (SiO2)
mineral
Rainbow Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Garnet Gneiss or Mica Schist with Garnet
Almandine Garnet-bearing Gneiss
metamorphic
Clear Quartz Point
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz with Mineral Inclusions
Silicon Dioxide (SiO2)
mineral
Gneiss
High-grade regional metamorphic rock (Foliated Gneiss)
metamorphic
Quartz
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Potassium Feldspar
K-Feldspar (Orthoclase/Microcline) KAlSi3O8
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Zircon
Zircon (Zirconium Silicate - ZrSiO4)
mineral
Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral