Botryoidal Hematite (Iron Ore)
Iron(III) oxide (Fe2O3)
mineral
Category
Mineral Pseudomorph
Browse mineral pseudomorph specimens identified by the Rock Identifier community.
Learn about Mineral Pseudomorph in the encyclopedia
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Quartzite Pebble (with mineral veining)
Metamorphic Quartzite (SiO2)
metamorphic
Amygdaloidal Basalt
Basalt with secondary mineral infilling (SiO2/CO3)
igneous
Prehnite
Prehnite (Ca2Al(AlSi3O10)(OH)2)
mineral
Quartz-veined Basalt or Limestone Pebble
Quartz vein in host rock (Silicate mineral in carbonate or volcanic matrix)
sedimentary
Painted Rock / Geode Specimen
Silicon Dioxide with artificial pigment coating
mineral
Granitic gneiss (weathered, rounded cobble)
Foliated granitoid; primarily quartz, feldspar, and mica (composition commonly approximates granite)
metamorphic
Biotite Schist
Schist (Biotite-dominated)
metamorphic
Granite
Granite (Felsic Plutonic Rock)
igneous
Sandstone (with possibly iron oxides and other minerals)
Sandstone
Sedimentary rock
Fossil-bearing Sedimentary Rock
Sedimentum cum fossili
fossil
Geode (Quartz / Chalcedony Geode)
SiO2 (Silicon Dioxide)
sedimentary
Spiny Oyster Shell
Spondylus (Calcium Carbonate, CaCO3)
mineral
Lapis Lazuli
Na6Ca2(Al6Si6O24)(S,SO4,Cl)1-2 (primarily containing Lazurite with inclusions of Calcite and Pyrite)
metamorphic
Brimstone (Native Sulfur)
Native Sulfur (S)
mineral
Malachite
Malachite - Cu2CO3(OH)2
mineral
Sandstone
Arenite (Clastic Sedimentary Rock)
sedimentary
Chrysocolla in Matrix
Chrysocolla (Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O)
mineral
Turquoise
Hydrated phosphate of copper and aluminium (CuAl6(PO4)4(OH)8·4H2O)
mineral
Fuchsite (Chrome Mica)
K(Al,Cr)2(AlSi3O10)(OH)2
mineral
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
mineral
Limonite (Yellow Ochre)
Hydrated iron(III) oxide-hydroxide (FeO(OH)·nH2O)
mineral
Quartz with Inclusions
Silicon Dioxide (SiO2)
mineral
Garnet
Almandine/Pyrope Garnet (X3Y2(SiO4)3)
mineral
Tiny metallic mineral fragment, possibly native gold
Native gold (Au), unconfirmed; could also be pyrite or chalcopyrite
mineral
Sandstone
Arenite
sedimentary
Limonite (Ironstone)
FeO(OH)·nH2O
sedimentary
Fossilized Bone
Permineralized Vertebrate Bone
fossil
Chrysocolla
Hydrated copper phyllosilicate (Cu,Al)2H2Si2O5(OH)4 nH2O
mineral
Turquoise in Matrix
Hydrated phosphate of copper and aluminum (CuAl6(PO4)4(OH)8·4H2O)
mineral
Purple Fluorite Octahedron
Fluorite (Calcium Fluoride, CaF2)
mineral
Jadeite and Mixed Gemstones (Ruby, Sapphire, Emerald)
Jadeite (NaAlSi2O6), Corundum (Al2O3), Beryl (Be3Al2(Si6O18))
mineral
Sandstone (River Rock)
Arenite (composed primarily of SiO2)
sedimentary
Sandstone Pebble with Mineral Encrustation
Quartz Sandstone with Calcite/Halite Crust
sedimentary
Limonite with Gold-bearing Quartz
Hydrated Iron Oxide Hydroxide, FeO(OH)·nH2O
mineral
Sedimentary Rock Fragments
Clastic Sedimentary Rock
sedimentary
Rhodochrosite
Manganese carbonate (MnCO3)
mineral
Limonite / Ironstone
FeO(OH)·nH2O
sedimentary
Jasper with Purple Fluorite or Chalcedony
Silicon Dioxide (SiO2) with mineral inclusions
sedimentary
Hemimorphite on Limonite Gossan
Hemimorphite (Zn4Si2O7(OH)2·H2O) on Limonite matrix
mineral
Sandstone
Arenite (SiO2 based)
sedimentary
Pegmatite
Igneous Pegmatite (Quartz-Feldspar-Biotite)
igneous