Gneiss
Gneiss
metamorphic
Category
Sedimentary Or Igneous
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Gneiss
Gneiss (Metamorphic rock dominated by Quartz, Feldspar, and various dark minerals)
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Gneiss
High-grade metamorphic rock (Gneiss)
metamorphic
Gneiss
Gneiss
metamorphic
Carnelian / Chalcedony
Cryptocrystalline Quartz (SiO2)
mineral
Gneiss
Gneiss
metamorphic
Greenstone / Graywacke
Metagraywacke or Chlorite Schist
metamorphic
Gneiss
Gneiss
metamorphic
Quartz (specifically Milky/White Quartz)
Silicon Dioxide (SiO2)
mineral
Gneiss (foliated metamorphic rock)
Gneiss
metamorphic
Gneiss
Gneiss
metamorphic
Specular Hematite (Iron Ore)
Iron(III) oxide (Fe2O3)
mineral
Graphite
Graphite (Chemical Formula: C)
Mineral (Native Element)
Feldspar
KAlSi3O8 - NaAlSi3O8 - CaAl2Si2O8
mineral
Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Schist
Mica Schist
metamorphic
Banded Gneiss
Gneiss (High-grade Metamorphic Rock)
metamorphic
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Clear Quartz Crystal
Quartz (Silicon Dioxide, SiO2)
mineral
Quartz (Milky/Rose variety)
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide - SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Gneiss
Gneiss
metamorphic
Quartz (Milky/Smoky Crystal fragment)
Silicon Dioxide (SiO2)
mineral
Epidote
Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))
mineral
Banded Gneiss
Gneiss
metamorphic
Gneiss (with Mica and Quartz)
Gneissic Metamorphic Rock
metamorphic
Quartz
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Crystalline Silicon Dioxide (SiO2)
mineral
Banded Chalcedony (Agate)
Cryptocrystalline Quartz (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Banded Gneiss
Gneiss (High-grade regional metamorphic rock)
metamorphic
Hematite
Iron(III) oxide (Fe2O3)
mineral
Garnet
Almandine (Fe3Al2(SiO4)3)
mineral
Chalcedony (Agate/Blue Quartzite)
Silicon Dioxide (SiO2)
mineral
Quartz (Tumbled/Water-worn)
Silicon Dioxide (SiO2)
mineral
Milky Quartz with Iron Staining
Quartz (Silicon Dioxide, SiO2)
mineral
Druzy Quartz
Crystalline Silicon Dioxide (SiO2)
mineral
Rough Precious Opal
Hydrated Silica (SiO2·nH2O)
mineral