Magnetite (Iron Ore)
Iron(II,III) oxide (Fe3O4)
mineral
Category
Igneous And Mineral
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Pyrite
Iron Sulfide (FeS2)
mineral
Kaolinite (Kaolin)
Kaolinite (Al2Si2O5(OH)4)
mineral
Assorted Tumbled Gemstones
Mixed oxides and silicates (including Quartz, Chalcedony, and Feldspar variants)
mineral
Quartz with Mica (Muscovite or Biotite)
Silicon Dioxide (SiO2) with Phyllosilicates
mineral
Gneiss (Cobble)
Gneiss
metamorphic
Pyrite
Iron Sulfide (FeS2)
mineral
Granite
Granite (Felsic Plutonic Rock)
igneous
Blue Apatite
Apatite - Ca5(PO4)3(F,Cl,OH) (Calcium phosphate with Fluorine, Chlorine, or Hydroxyl)
mineral
Dalmatian Jasper
Peralkaline Quartz-Feldspar Rock with Arfvedsonite
igneous
Quartz Vein Rock
Silicon Dioxide (SiO2)
mineral
Quartz-rich Diorite
Diorite (Phaneritic intermediate igneous rock)
igneous
Granodiorite
Granodiorite
igneous
Granite fragment
Granite (Felsic intrusive igneous rock)
igneous
Native Copper in Basalt
Cuprum (with Host Basalt)
igneous
Chalcopyrite
CuFeS2
mineral
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace Titanium, Manganese, or Iron
mineral
Golden Calcite
Calcium Carbonate (CaCO3)
mineral
Banded Carnelian Agate
Silicon Dioxide (SiO2)
sedimentary
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Rose Quartz
Silicon dioxide (SiO2)
mineral
Honey Calcite
Calcium Carbonate (CaCO3)
mineral
Chromite
Chromite (FeCr2O4)
mineral
Banded Agate
Cryptocrystalline Quartz (SiO2)
sedimentary
Magnetite / Ironstone Pebble
Magnetite (Fe3O4)
mineral
Pyrite (Fools Gold)
Iron Disulfide (FeS2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz Vein / Milky Quartz
Silicon Dioxide (SiO2)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Green Aventurine
Silicon Dioxide (SiO2) with inclusions of Fuchsite mica
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Pyrite in Quartz
Silicon Dioxide (SiO2) with Iron Sulfide (FeS2)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Pyrite
Iron Disulfide (FeS2)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Pyrite in Matrix
Iron Disulfide (FeS2)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Quartz (Small Pebble)
Silicon Dioxide (SiO2)
mineral