Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Category
Igneous And Metamorphic
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Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Tumbled Quartz
Silicon Dioxide (SiO2)
mineral
Black Tourmaline
Schorl (NaFe2+3Al6(Si6O18)(BO3)3(OH,F)4)
mineral
Sugilite in Quartz
KNa2(Fe,Mn,Al)2Li3Si12O30
mineral
Quartz (vein quartz)
SiO2 (Silicon Dioxide)
Mineral
Muscovite
KAl2(AlSi3O10)(OH)2
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Quartz pebble
Silicon dioxide (SiO2)
mineral
Limonite Concretion
Hydrated Iron Oxide-Hydroxide, FeO(OH)·nH2O
mineral
Black Tourmaline
Schorl (NaFe3Al6(Si6O18)(BO3)3(OH)4)
mineral
Moonstone
Orthoclase (KAlSi3O8) or Oligoclase with adularescence
gemstone
Quartz pebble
Silicon dioxide (SiO2)
sedimentary
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
Mineral
Gold
Gold (Au)
mineral
Clear Quartz Crystal
Silicon Dioxide (SiO2)
mineral
Blue Quartz
Silicon Dioxide (SiO2)
mineral
Sunstone
Feldspar (Oligoclase or Labradotite)
gemstone
Quartz pebble
Silicon dioxide (SiO2)
mineral
Feldspar
Potassium Feldspar (KAlSi3O8)
mineral
Quartz pebble
Silicon dioxide (SiO2)
sedimentary
Quartz pebble
Silicon dioxide (SiO2)
sedimentary
Quartz pebble with iron staining
Silicon dioxide (SiO2) with iron oxide inclusions
mineral
Peacock Ore
Bornite (Cu5FeS4)
mineral
Hematite
Iron Oxide (Fe2O3)
mineral
Quartz (Smoky/Brown variety)
Silicon dioxide (SiO2)
mineral
Blue Apatite
Apatite-(CaF), Ca5(PO4)3F (Calcium Fluorophosphate)
mineral
Quartz pebble
Silicon dioxide (SiO2)
mineral
Quartz pebble
Silicon dioxide (SiO2)
mineral
Agate
Silicon dioxide (SiO2)
gemstone
Agate
Silicon dioxide (Chalcedony), SiO2
gemstone
Agate
Silicon Dioxide (SiO2)
gemstone
Red Quartz
Silicon Dioxide (SiO2)
mineral
Quartz with Iron Oxide Staining
Silicon Dioxide (SiO2)
mineral
Agate
Silicon Dioxide (Chalcedony), SiO2
gemstone
White Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Smoky Quartz
Quartz (SiO₂)
Mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Epidote-bearing Rock
Epidote / Silicate mineral aggregate
metamorphic
Epidote
Epidote (Ca2(Al,Fe)3(SiO4)3(OH))
mineral
Sapphire
Corundum (Al2O3)
gemstone