Quartz (Smoky/Brown variety)
Silicon dioxide (SiO2)
mineral
Category
Igneous And Metamorphic
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Blue Apatite
Apatite-(CaF), Ca5(PO4)3F (Calcium Fluorophosphate)
mineral
Quartz with Iron Oxide Staining
Silicon Dioxide (SiO2)
mineral
Smoky Quartz
Quartz (SiO₂)
Mineral
Quartz pebble with iron staining
Silicon dioxide (SiO2) with iron oxide inclusions
mineral
Peacock Ore
Bornite (Cu5FeS4)
mineral
Quartz Pebble
Silicon Dioxide (SiO2)
mineral
Agate
Silicon Dioxide (Chalcedony), SiO2
gemstone
Epidote-bearing Rock
Epidote / Silicate mineral aggregate
metamorphic
Galena
Lead Sulfide (PbS)
mineral
Yellow Quartz (Citrine Quartz / Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Strawberry Quartz
Quartz with Hematite inclusions (SiO2 + Fe2O3)
mineral
Strawberry Quartz (Quartz with Hematite inclusions)
Silicon Dioxide with Iron Oxide (SiO2 + Fe2O3)
mineral
Biotite Mica
Biotite (K(Mg,Fe)3(AlSi3O10)(F,OH)2)
mineral
Amethyst Geode/Cluster
Quartz (SiO2) - variety Amethyst
Mineral
Citrine
Silicon dioxide (SiO2)
mineral
Quartz pebble
Silicon dioxide (SiO2)
mineral
Biotite on Matrix
Biotite (K(Mg,Fe)3AlSi3O10(F,OH)2)
mineral
Bronzite
MgSiO3 (Enstatite with 10-30% FeSiO3 in solid solution)
Mineral
Black Tourmaline
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Pyrite-bearing Rock
Iron Sulfide (FeS2) associated with host rock
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Black Tourmaline (Schorl)
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral
Citrine or Yellow Sapphire
Quartz (SiO2) or Corundum (Al2O3)
gemstone
Quartz pebble / River stone
SiO2 (Silicon Dioxide)
mineral
Biotite (Black Mica)
Biotite - K(Mg,Fe)3(AlSi3O10)(F,OH)2
mineral
Tumbled Moonstone
Feldspar (Orthoclase/Albite), KAlSi3O8
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Moonstone
Orthoclase Feldspar ((Na,K)AlSi3O8)
mineral
Moonstone
Orthoclase Feldspar ((K,Na)AlSi3O8)
mineral
Blue Quartz (Dumortierite Quartz)
SiO2 with inclusion of AlAl6BSi3O18
mineral
Black Tourmaline (Schorl)
Schorl (NaFe3Al6(BO3)3Si6O18(OH)4)
mineral
Citrine
Silicon Dioxide (SiO2) with ferric iron impurities
gemstone
Black Tourmaline
Schorl (NaFe2+3Al6(Si6O18)(BO3)3(OH)4)
mineral
Blue Quartz
Silicon Dioxide (SiO2) with inclusions
mineral
Rainbow Moonstone
White Labradorite (Plagioclase Feldspar), (Na,Ca)(Al,Si)4O8
gemstone
Black Tourmaline
Schorl (NaFe2+3Al6(Si6O18)(BO3)3(OH)4)
mineral
Moonstone (with Tourmaline/Mica)
Orthoclase/Albite Feldspar (KAlSi3O8 / NaAlSi3O8)
mineral
Smoky Quartz
Silicon Dioxide (SiO2)
mineral