Quartz
Silicon Dioxide (SiO2)
mineral
Category
Sedimentary And Igneous
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Granite Gneiss
Metamorphic Rock (Quartz, Potassium Feldspar, Plagioclase, Biotite/Amphibole)
metamorphic
Gneiss
Gneiss
metamorphic
Magnetite or Hematite (Iron Stone)
Magnetite (Fe3O4) or Hematite (Fe2O3)
mineral
Agate (specifically crazy lace agate / orbicular agate node)
Silicon Dioxide (SiO2) - Microcrystalline Quartz
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Green Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Greenschist
Chlorite Schist
metamorphic
Pyrite
Iron Sulfide (FeS2)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Blue Quartz (Blue Chalcedony/Dumortierite Quartz)
Silicon Dioxide (SiO2) with inclusions (typically Dumortierite Al7(BO3)(SiO4)3O3)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Amphibolite (specifically Hornblende Schist/Gneiss)
Amphibole-rich Metamorphic Rock
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Nuummite
Nuummite (Orthoamphibole rock / Anthophyllite-Gedrite blend)
metamorphic
Banded Agate (Jasper-Agate)
Silicon Dioxide (SiO₂)
Mineral
Chalcedony (Carnelian Agate pebble)
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Banded Gneiss
Gneiss (High-grade Regional Metamorphic Rock)
metamorphic
Gneiss with Quartz Veining
Gneiss (High-grade regional metamorphic rock)
metamorphic
Pyrite
Iron Sulfide (FeS2)
mineral
Gneiss
Gneiss
metamorphic
Gneissic River Pebble
Gneiss
metamorphic
Granite Gneiss with Garnet
Garnetiferous Gneiss
metamorphic
White Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Gneiss (Banded Gneiss)
Gneiss
metamorphic
Quartz (Milky/Common variant)
Silicon Dioxide (SiO2)
mineral
Biotite (Black Mica)
Biotite (K(Mg,Fe)3AlSi3O10(OH)2)
mineral
Gneiss
Gneiss
metamorphic
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Hematite
Iron(III) oxide (Fe2O3)
mineral
Turquoise (possible Dyed Magnesite/Howlite)
CuAl6(PO4)4(OH)8·4H2O
mineral
Quartz (Clear Quartz/Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Magnetite (Lodestone variety)
Magnetite (Iron(II,III) oxide, Fe3O4)
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Magnetite / Ironstone
Magnetite (Fe3O4)
mineral
Epidote with Magnetite/Hematite inclusions
Epidote (Ca2(Al2,Fe3+)(SiO4)3(OH)) with Iron Oxides
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Clear Quartz (Rock Crystal)
Silicon Dioxide (SiO2)
mineral
Schist (specifically Chlorite/Greenschist)
Chlorite Schist
metamorphic