Pyrite on Quartz
Iron Sulfide (FeS2) on Silicon Dioxide (SiO2)
mineral
Category
Sedimentary And Igneous
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Milky Quartz
Silicon Dioxide (SiO2)
mineral
Carnelian Agate
Chalcedony (SiO2) with iron oxide inclusions
mineral
Gneiss
Metamorphic Gneiss (High-grade regional metamorphism)
metamorphic
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Biotite Schist
Biotite-rich Schist
metamorphic
Pyrite (Fools Gold)
Iron Sulfide (FeS2)
mineral
Agate Geode
Chalcedony (cryptocrystalline SiO2)
mineral
Quartz
Quartz (SiO₂)
Mineral
Yellow Quartz (Citrine/Yellow Jasper Pebble)
Silicon Dioxide (SiO2)
sedimentary
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Garnet Amphibolite (or Garnet Gneiss)
Garnet amphibolite / Garnet-bearing metamorphic rock
metamorphic
Banded Gneiss
Gneiss (SiO2-rich metamorphic rock)
metamorphic
Pyrite
Iron Sulfide (FeS2)
mineral
Banded Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Potassium Feldspar
Orthoclase (KAlSi3O8)
mineral
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Blue Calcite Sphere
Calcium Carbonate (CaCO3)
mineral
Carnelian (Red Chalcedony)
Silicon Dioxide (SiO2)
mineral
Zircon
Zircon (Zirconium Silicate, ZrSiO4)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz (Druzy or Crystalline)
Silicon Dioxide (SiO2)
mineral
Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Banded Gneiss (with Quartz Vein)
Gneiss (SiO2 and varied Silicates)
metamorphic
Gneiss
Gneiss
metamorphic
Gneiss
Gneiss
metamorphic
Yellow Chalcedony (Agate Pebble)
Silicon Dioxide (SiO2) - Cryptocrystalline Quartz
mineral
Blue Calcite (commonly sold as Caribbean Calcite)
Calcium Carbonate (CaCO3)
mineral
Specular Hematite (Specularite)
Iron Oxide (Fe2O3)
mineral
Blue Chalcedony
Microcrystalline Quartz (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Gneiss with Orthoclase Feldspar
Gneissic Metamorphic Rock with K-Feldspar inclusions
metamorphic
River Cobble (Salt and Pepper Gneiss)
Gneiss (High-grade regional metamorphic rock)
metamorphic
Gneiss
Gneiss
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Gneiss
Gneiss
metamorphic