Pyrite on Limestone
Iron Disulfide (FeS2) in Calcium Carbonate (CaCO3) matrix
sedimentary (matrix) / mineral (inclusion)
Category
Mineral (Processed Metal)
Browse mineral (processed metal) specimens identified by the Rock Identifier community.
Learn about Mineral (Processed Metal) in the encyclopedia
View all →
Slag
Ferrous Slag (Amorphous calcium-magnesium-aluminum silicates)
igneous (artificial/anthropogenic)
Banded agate pendant (likely carnelian or brown-and-white chalcedony agate)
Agate, a banded variety of chalcedony; microcrystalline quartz, SiO₂, with iron-oxide coloration
gemstone
Dyed Purple Agate Sliced
Silicon Dioxide (SiO2) with artificial pigment
mineral
Diamond jewelry
Diamond (crystalline carbon, C)
gemstone
Milky Quartz
Quartz (Silicon Dioxide) - SiO2
mineral
Milky Quartz
Silicon Dioxide (SiO2)
mineral
Quartz (Druzy / Goldstone Gemstone Cabochon)
Silicon Dioxide (SiO2)
gemstone
Gold Nugget
Native Gold (Au)
mineral
Rose Quartz
Silicon Dioxide (SiO2)
mineral
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
mineral
Silver (Sterling Silver Jewelry)
Argentum (Ag) mixed with Copper (Cu)
mineral
Gold
Native Gold (Au)
mineral
Copper-bearing Quartz (with Malachite and Iron Oxides)
Quartz (SiO2) with Malachite (Cu2CO3(OH)2) and Hematite/Limonite (Fe2O3)
Mineral Specimen
White Quartz (Milky Quartz)
Silicon Dioxide (SiO2)
mineral
Rose Quartz
Silicon Dioxide (SiO2) with trace amounts of titanium, iron, or manganese
mineral
Diamond
Carbon (C)
mineral
Sandstone (Quartz-rich)
Arenite (SiO2 based clastic rock)
sedimentary
Bauxite (Iron-stained Chert / Ironstone Aggregate)
Hydrous aluminum oxide mixture (mainly Gibbsite Al(OH)3, Boehmite γ-AlO(OH), and Goethite α-Fe3+O(OH))
sedimentary
Jasper
Jasper (Silica-rich Microcrystalline Quartz, SiO2)
sedimentary
Pyrulite (Pyrite / Chalcopyrite)
Iron Sulfide (FeS2) or Copper Iron Sulfide (CuFeS2)
mineral
Pyrite in Matrix
Iron Disulfide (FeS2)
mineral
Greenstone
Metamorphic Greenstone (Greenschist facies)
metamorphic
Lepidolite with Quartz
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
mineral
Celestite (Celestine)
Strontium sulfate (SrSO4)
mineral
Ferruginous Sandstone (Gritstone)
Clastic sedimentary rock with iron-rich cement (FeO(OH)·nH2O)
sedimentary
Sandstone
Arenite (primarily Quartz, SiO2)
sedimentary
Lepidolite Polished Point
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
mineral
Milky Quartz
Silicon Dioxide (SiO2)
Mineral
Opalite
Opalescent Glass (SiO2 + coloring agents)
Mineral (Synthetic/Man-made)
Amethyst
Amethyst (Silicon Dioxide, SiO2)
mineral
Blue Topaz
Aluminum Silicate Fluoride Hydroxide Al2SiO4(F,OH)2
mineral
Hypersthene
Hypersthene (Magnesium Iron Silicate - (Mg,Fe)SiO3)
mineral
Gossan (Iron Hat)
Limonitic Gossan (Fe-oxide/hydroxide complex)
igneous
Pyrite (Fool's Gold)
Iron Disulfide (FeS2)
mineral
Gossan with Copper Carbonate (Chrysocolla/Malachite)
Ferruginous Oxide (Gossan) with Cu2CO3(OH)2 (Malachite) or (Cu,Al)2H2Si2O5(OH)4 (Chrysocolla)
Mineral/Sedimentary Interface
Fluorite (often called Rainbow Fluorite or Purple-Green Fluorite)
Calcium Fluoride (CaF2)
mineral
Lepidolite
K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2
mineral
Flint (Chert Node)
Silicon Dioxide (SiO2)
sedimentary
Gold and Silver (Metal Components of an Antique Pocket Watch)
Native Gold (Au) and Native Silver (Ag)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Auriferous Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral