Pyrite
Iron Pyrite (FeS2)
mineral
Category
Sedimentary (With Some Aspects Of Mineral Replacement)
Browse sedimentary (with some aspects of mineral replacement) specimens identified by the Rock Identifier community.
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
mineral
Carnelian
SiO2 (Silicon Dioxide), a variety of Chalcedony
mineral
Green Calcite
Calcium Carbonate (CaCO3)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Pyrite (on host rock/ore)
Iron Sulfide (FeS2)
mineral
Satin Spar Selenite
Gypsum (Calcium Sulfate Dihydrate, CaSO4·2H2O)
mineral
Mica Schist
Mica Schist (predominantly Muscovite or Biotite sheet silicates)
metamorphic
Pyrite (Fool's Gold) Ore
Iron Disulfide (FeS2)
mineral
Yellow Jasper
Jasper (Silicon Dioxide, SiO2)
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Quartz Geode
Silicon Dioxide (SiO2)
mineral
Agate (Chert/Chalcedony)
Silicon Dioxide (SiO2)
mineral
Plume Agate
Silicon Dioxide (SiO2)
mineral
Selenite (Satin Spar Gypsum)
Calcium Sulfate Dihydrate (CaSO4·2H2O)
mineral
Carnelian Agate
Silicon Dioxide (SiO2) with iron oxide impurities
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Sandstone with Iron Concretion
Arenite with Limonite/Goethite Concretion
sedimentary
Banded Agate
Cryptocrystalline Quartz (SiO2)
mineral
Turquoise (Green variety)
Hydrous phosphate of copper and aluminum, CuAl6(PO4)4(OH)8·4H2O
mineral
Clear Quartz
Silicon Dioxide (SiO2)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Quartz Vein / Milky Quartz
Silicon Dioxide (SiO2)
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Biotite Gneiss
Gneiss (complex mixture including Biotite K(Mg,Fe)3AlSi3O10(F,OH)2 and Quartz/Feldspar)
metamorphic
Sandstone
Arenite (primarily SiO2)
sedimentary
Quartz Geode (partially formed)
Silicon Dioxide (SiO2)
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Shale
Fissile mudrock (composed primarily of clay minerals and quartz)
sedimentary
Sandstone (Banded)
Clastic Sedimentary Rock: Arenite
sedimentary
Petrified Wood
Silicified Wood (primarily SiO2)
mineral
Epidote
Epidote Group (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))
metamorphic
Sandstone (Banded)
Clastic Sedimentary Rock (primarily SiO2)
sedimentary
Pink Granite
Phaneritic Plutonic Felsic Igneous Rock (Granite)
igneous
Jasper with Iron Staining
Silicon Dioxide (SiO2) - Microcrystalline Quartz
sedimentary
Concretion with Quartz Veining
Septarian Concretion (CaCO3 / SiO2)
sedimentary
Geode (Unbroken)
Silicon Dioxide (SiO2) usually as Microcrystalline Quartz or Chalcedony
sedimentary
Chert / Flint Nodules in Limestone
Silicon Dioxide (SiO2) within Calcium Carbonate (CaCO3)
sedimentary
Chalcedony in Limestone Host Rock
Silicon Dioxide (SiO2) within Calcium Carbonate (CaCO3)
Mineral within Sedimentary Rock
Leopard Skin Jasper
Jasper (Silicon Dioxide with impurities), SiO2
sedimentary
Serpentine Schist with Quartz Vein
Serpentine Schist (a type of Metamorphic rock). The white band is likely Quartz (SiO2).
Metamorphic