Pyrite in Matrix (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Category
Mixed (Predominantly Sedimentary And Igneous)
Browse mixed (predominantly sedimentary and igneous) specimens identified by the Rock Identifier community.
Pyrite (locally known as Fool's Gold)
Iron Sulfide (FeS2)
mineral
Quartz
Silicon Dioxide (SiO2)
mineral
Clear Quartz Crystal
Quartz (Silicon Dioxide, SiO2)
mineral
Foliated Metamorphic Rock (likely Gneiss or Schist)
Gneissic Metamorphic Rock
metamorphic
Gold Mineral
Native Gold (Au)
mineral
Quartz (Milky/Common Quartz)
Silicon Dioxide (SiO2)
mineral
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Amazonite (Green Feldspar)
Microcline (variety Amazonite), Chemical Formula: K(AlSi3O8)
mineral
Dream Amethyst (Chevron Amethyst)
Silicon Dioxide with Iron impurities (SiO2)
mineral
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxide inclusions)
metamorphic
Watermelon Tourmaline
Elbaite - Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3OH
mineral
Rose Quartz
Silicon dioxide (SiO2)
mineral
Amber
Succinite (Formula: C10H16O)
mineral
Green Aventurine (Tumbled)
Quartz (SiO2) containing Fuchsite (K(Al,Cr)2(AlSi3O10)(OH)2)
metamorphic
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with inclusions of iron oxide)
metamorphic
Jadeite Jade
NaAlSi2O6 (Sodium Aluminum Silicate)
metamorphic
Howlite
Calcium borosilicate hydroxide (Ca2B5SiO9(OH)5)
mineral
Green Aventurine
Silicon Dioxide (Quartz with Fuchsite inclusions), SiO2 + K(Al,Cr)2AlSi3O10(OH)2
mineral
Jadeite (Jade)
Jadeite, NaAlSi2O6
metamorphic
Black Onyx
Silicon Dioxide (SiO2)
mineral
Diamond
Carbon (C)
mineral
Nephrite Jade
Nephrite (Ca2(Mg, Fe)5Si8O22(OH)2)
metamorphic
Tiger Iron
Tiger Iron (Hematite, Red Jasper, and Chert/Tiger's Eye composite)
metamorphic
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with iron inclusions)
metamorphic
Amber
Succinite (fossilized tree resin)
Organic Mineraloid
Unakite
Epidotized Granite
metamorphic
Tiger's Eye
Pseudomorph of Quartz after Crocidolite (SiO2 with iron oxide inclusions)
metamorphic
Pyrite
Pyrite (Iron Disulfide), FeS2
Mineral
Schist
Mica Schist (primarily consisting of muscovite KAl2(AlSi3O10)(OH)2 or biotite K(Mg,Fe)3(AlSi3O10)(OH)2)
metamorphic
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Milky/Rose Quartz variety)
Silicon Dioxide (SiO2)
mineral
Blue Calcite
Calcium Carbonate (CaCO3)
mineral
Quartz (Common or Milky)
Silicon Dioxide (SiO2)
mineral
Fluorite
Fluoride (Calcium Fluoride - CaF2)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Quartz Geode Fragment
Silicon Dioxide (SiO2)
mineral
Yellow Quartz (Citrine/Yellow Jasper)
Silicon Dioxide (SiO2)
mineral
Yellow Calcite
Calcium Carbonate (CaCO3)
mineral