Hematite
Iron(III) oxide (Fe2O3)
Category
Browse sedimentary (secondary mineral) within igneous specimens identified by the Rock Identifier community.
Hematite
Iron(III) oxide (Fe2O3)
Quartz (Milky/Crystal variety)
Silicon Dioxide (SiO2)
Quartz Druzy (on Calcedony/Quartz base)
Silicon Dioxide (SiO2)
Gneiss
Gneiss (High-grade metamorphic rock)
Pyrite
Iron Sulfide (FeS2)
Gneiss
Gneiss (Foliated Metamorphic Rock)
Gneiss
Metamorphic Gneiss
Chert (Jasper/Agate variety)
Microcrystalline quartz (SiO2)
Iridium sand or Osmium-Iridium nugget
Iridosmine / Osmiridium (Platinoid grouping)
Agate Geode with Quartz Druzy
Cryptocrystalline Quartz (SiO2)
Dyed Agate Geode
Silicon Dioxide (SiO2) - Banded Chalcedony
Ferruginous Quartz (Stained Quartz)
Silicon Dioxide (SiO2) with secondary Iron Oxide inclusions (Limonite/Hematite)
Basalt with Quartz Vein
Basalt (Mafic Extrusive Igneous Rock)
Gneiss (specifically Micaceous Gneiss)
Gneiss (High-grade Regional Metamorphic Rock)
Fluorite
Calcium fluoride (CaF2)
Dalmatian Stone
Dalmatian Stone (a variety of aplite)
Milky Quartz
Silicon Dioxide (SiO2)
Quartz (Milky/Chalcedony variety)
Silicon Dioxide (SiO2)
Chalcedony (Botryoidal or Tumbled)
Chalcedony (SiO₂)
Fluorite (Green)
Fluorite (Calcium Fluoride, CaF2)
Quartz Pebble
Silicon Dioxide (SiO2)
Chrysocolla (on host rock)
Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (Copper silicate)
Quartz Vein with Iron Staining
Silicon Dioxide (SiO2) with limonite/hematite staining
Granitic Gneiss
Gneiss (High-grade metamorphic rock)
Gneiss
Gneiss
Milky Quartz
Quartz (Silicon Dioxide, SiO2)
Rough turquoise
Turquoise — hydrated copper aluminum phosphate, CuAl₆(PO₄)₄(OH)₈·4H₂O
Yellow Agate (Banded Chalcedony)
Silicon Dioxide (SiO2)
Ferruginous Quartz
Silicon Dioxide (SiO2) with Hematite/Limonite inclusions
Rhodochrosite
Manganese Carbonate (MnCO3)
Clear Quartz
Silicon Dioxide (SiO2)
Rhodochrosite
Manganese carbonate (MnCO3)
Limonite (Iron Ore Congcretion)
Limonite (a mixture of hydrated iron(III) oxide-hydroxides, FeO(OH)·nH2O)
Botryoidal Hematite (included in Quartz/Limonite matrix)
Fe2O3 (Hematite) on Quartz (SiO2) / Limonite
Banded Gneiss
Gneiss (High-grade regional metamorphic rock)
Gneiss
Gneiss
Gneiss (with Quartzite and Mica)
Gneiss
Chalcedony
Cryptocrystalline Quartz (SiO2)
Turquoise
Hydrated copper aluminum phosphate, CuAl₆(PO₄)₄(OH)₈·4H₂O
K2 Jasper (K2 Stone)
Azurite in Granite / Quartzite
Limonite Nodules / Goethite
Hydrated Iron Oxide-Hydroxide (FeO(OH)·nH2O / Fe2O3·nH2O)
Greenstone Pebble
Metabasalt / Greenschist