Pyrite
Iron Sulfide (FeS2)
Category
Browse sedimentary (secondary mineral) within igneous specimens identified by the Rock Identifier community.
Pyrite
Iron Sulfide (FeS2)
Pyrite
Iron Sulfide (FeS2)
Pyrulite (Pyrite / Chalcopyrite)
Iron Sulfide (FeS2) or Copper Iron Sulfide (CuFeS2)
Pyrite (Fool's Gold)
Iron Sulfide (FeS2)
Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
Lepidolite
Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)
Vanadinite
Vanadinite (Pb5(VO4)3Cl)
Green Moonstone (Garnierite)
Nickel-bearing Magnesium Silicate (often a mix of Serpentine and Talc/Chlorite groups)
Quartz Geode (partially formed)
Silicon Dioxide (SiO2)
Milky Quartz in Conglomerate Matrix
Silicon Dioxide (SiO2) within Clastic Sedimentary Rock
Quartz (River Pebble)
Silicon Dioxide (SiO2)
Schist
Mica Schist (formula variable based on mineral content, typically containing [K,Al,Fe,Mg,Si,O,H])
Banded Chert or Agate
Silicon Dioxide (SiO2)
Red Jasper
Silicon Dioxide (SiO2) with Hematite impurities
Agate (specifically Chalcedony/Banded Agate)
Silicon Dioxide (SiO2)
Chert / Jasper / Agate (Chalcedony Group)
Microcrystalline Quartz (SiO2)
Turquoise
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
Sulfur on Quartz
Native Sulfur (S8) with Quartz (SiO2)
Granite
Granite (a plutonic igneous rock composed of quartz, feldspar, and mica)
Conglomerate
Conglomerate (a clastic sedimentary rock)
Geode (Unbroken)
Silicon Dioxide (SiO2) usually as Microcrystalline Quartz or Chalcedony
Granite
Phaneritic Plutonic Felsic Rock (Granite)
Schist
Schist (various mineralogical compositions including mica, chlorite, talc, etc.)
Bornite
Bornite (Cu5FeS4)
Concretion with Quartz Veining
Septarian Concretion (CaCO3 / SiO2)
Azurite with Malachite
Azurite: Cu3(CO3)2(OH)2 / Malachite: Cu2CO3(OH)2
Common Opal with Host Rock
Opal (Hydrated silica, SiO2·nH2O)
Quartz
Quartz (SiO2 - Silicon Dioxide)
Milky Quartz Pebble
Quartz (Silicon Dioxide, SiO2)
Labradorite
Labradorite ((Ca, Na)(Al, Si)4O8)
Pearl
Calcium Carbonate (CaCO3) with Conchiolin
Quartz Geode Fragment
Silicon Dioxide (SiO2)
Carnelian Agate
Carnelian (Silicon Dioxide, SiO2)
Green Kyanite
Kyanite (Al2SiO5)
Quartz Geode
Clear Quartz (Silicon Dioxide, SiO2)
Yellow Calcite
Calcium Carbonate (CaCO3)
Smoky Quartz
Smoky Quartz (SiO2 - Silicon Dioxide with aluminum impurities)
Sunstone (Heliolite)
Plagioclase Feldspar ((Ca,Na)(Al,Si)4O8)
Quartz
Quartz (SiO2 - Silicon Dioxide)
Calcite Geode
Calcium Carbonate (CaCO3)
Malachite Coating on Host Rock
Malachite [Cu2CO3(OH)2]
Gneiss (Granitic Gneiss)
Gneiss