Gravel and Sediment Sample
Mixed clastic sediment
sedimentary
Category
Mineral Pseudomorph
Browse mineral pseudomorph specimens identified by the Rock Identifier community.
Learn about Mineral Pseudomorph in the encyclopedia
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Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Orthoclase Feldspar
Potassium aluminum silicate (KAlSi3O8)
mineral
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Potassium Feldspar (Orthoclase)
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Chalcopyrite
Copper iron sulfide (CuFeS2)
mineral
Banded Sedimentary Rock
Sedimentary rock with mineral veins/banding
sedimentary
Vesicular Basalt / Scoria pebble
Extrusive igneous rock with amygdaloidal infilling
igneous
Banded Gneiss
Gneiss (Felsic to Mafic Metamorphic Rock)
metamorphic
Synthetic Resin (Artificial Specimen)
Polyurethane or Polyester Resin
mineraloid (man-made)
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Orthoclase Feldspar with Quartz
Orthoclase (KAlSi3O8)
mineral
Quartz with Sericite and Cinnabar
Silicon Dioxide (SiO2) with muscovite/sericite and mercury sulfide (HgS)
mineral
Shark Tooth Fossil
Chondrichthyes (class) fossilized tooth
fossil
Fossilized Shark Tooth
Chondrichthyes (Class)
fossil
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
mineral
Rainbow Fluorite
Calcium Fluoride (CaF2)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Apatite
Fluorapatite, Chlorapatite, and Hydroxylapatite (Ca5(PO4)3(F,Cl,OH))
mineral
Apatite
Ca5(PO4)3(F,Cl,OH)
mineral
Quartz Mineral
Silicon Dioxide (SiO2)
mineral
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Potassium Feldspar
Orthoclase (KAlSi3O8)
mineral
Pink Feldspar (Orthoclase)
Orthoclase Feldspar (KAlSi3O8)
mineral
Quartz with Mineral Inclusions
Silicon Dioxide (SiO2)
mineral
Geode half
Geode (often quartz/chalcedony based)
sedimentary or igneous
Black Sand (Magnetite/Heavy Mineral Concentrate)
Magnetite-rich Placers (Fe3O4)
sedimentary
Shark Tooth Fossil
Vertebrate fossilized tooth (various genera such as Carcharodon, Otodus, or Negaprion)
fossil
Granite
Phaneritic Plutonic Felsic Rock
igneous
Granitic Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Gneiss with Quartz Veining
Gneiss (High-grade Metamorphic Rock)
metamorphic
Carved Sea Turtle Figurine (Aventurine / Quartz / Jasper)
Quartz variety (SiO2) / Polycrystalline Quartz Aggregate
mineral
Blue Apatite
Ca5(PO4)3(F,Cl,OH)
mineral
Hemimorphite
Hemimorphite (Zn4Si2O7(OH)2·H2O)
mineral
Yooperlite (Sodalite-bearing Syenite)
Sodalite-rich Syenite
igneous
Granite
Intrusive igneous rock
igneous
Gneiss
Gneiss
metamorphic
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Sandstone
SiO2 (predominantly quartz sand)
sedimentary
Rhodochrosite
Manganese carbonate (MnCO3)
mineral
Chrysocolla and Malachite Beads
Hydrated copper silicates (Chrysocolla) and Copper carbonate hydroxide (Malachite)
mineral