Hematite
Iron(III) oxide (Fe2O3)
mineral
Category
Mineral (Primary Constituent)
Browse mineral (primary constituent) specimens identified by the Rock Identifier community.
Quartz with Chalcopyrite and Pyrite
Silicon Dioxide (SiO2) with Copper Iron Sulfide (CuFeS2)
mineral
Amethyst (Quartz)
Amethyst (SiO2 with iron impurities)
mineral
Chondrite Meteorite
Ordinary Chondrite (Fe-Ni alloy, Olivine, Pyroxene)
Mineral
Gold
Native Gold (Au)
mineral
Lepidolite on Matrix
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
mineral
Sodalite
Na8(Al6Si6O24)Cl2
mineral
Diamond (in jewelry setting)
Diamond (C - Carbon)
mineral
Diamond (set in a gold ring)
Carbon (C) - Adamantine cubic carbon
mineral
Note: Image shows a biological specimen (Rat), not a rock. Representative geological equivalent: Galena (due to lead-grey colors in fur).
Galena (PbS)
mineral
Citrine Quartz
Silicon Dioxide (SiO2)
mineral
Chert (varieties: Flint or Chalcedony)
Microcrystalline Quartz (SiO2)
sedimentary
Aragonite
Aragonite (Carbonate mineral), CaCO3
mineral
Basalt
Basalt (Mafic volcanic rock)
igneous
Red Sandstone
Arenite (Ferruginous Sandstone)
sedimentary
Sandstone
Sandstone (principally SiO2)
sedimentary
Hematite
Iron(III) oxide (Fe2O3)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Silicon
Crystalline Silicon (Si)
mineral
Diamond
Native Carbon (C)
mineral
Diamond
Carbon (C)
mineral
Ruby
Corundum (Al2O3)
mineral
Gold Ore
Native Gold (Au)
mineral
Amethyst on Agate/Basalt Matrix
Silicon Dioxide (SiO2) with iron impurities
mineral
Rough Diamond
Diamond (Native Carbon, C)
mineral
Amethyst
SiO2 (Silicon Dioxide) - Purple variety of Quartz
mineral
Honey Calcite
Calcite (Calcium Carbonate, CaCO3)
mineral
Milky Quartz
Quartz (Silica - SiO2)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Parti Sapphire
Corundum (Al2O3)
mineral
Aquamarine (Pale variety)
Beryl (Be3Al2Si6O18)
mineral
Native Gold Nugget
Native Gold (Au)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Citrine
Silicon dioxide (SiO2) - yellow quartz variety
mineral
Gold Nugget
Native Gold (Au)
mineral
Diamond
Diamond (Pure Carbon, C)
mineral
Gold
Gold (Native Au)
mineral
Ruby
Corundum (Al2O3 with Chromium)
mineral
Red Cubic Zirconia (Simulated Garnet)
Zirconium Dioxide (ZrO2)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Hematite (Concretion)
Iron(III) oxide (Fe2O3)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral