Orthoclase Feldspar with Quartz
Orthoclase (KAlSi3O8)
mineral
Category
Mineral (Impactite)
Browse mineral (impactite) specimens identified by the Rock Identifier community.
Learn about Mineral (Impactite) in the encyclopedia
View all →
Limonite (Iron Ore)
Limonite (FeO(OH)·nH2O)
mineral
Fluorite and Mineral Collection
Calcium Fluoride (CaF2)
mineral
Synthetic Resin (Artificial Specimen)
Polyurethane or Polyester Resin
mineraloid (man-made)
Rainbow Fluorite
Calcium Fluoride (CaF2)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Apatite
Fluorapatite, Chlorapatite, and Hydroxylapatite (Ca5(PO4)3(F,Cl,OH))
mineral
Quartz with Associated Minerals
Silicon Dioxide (SiO2)
mineral
Fossilized Shark Tooth
Chondrichthyes (Class)
fossil
Shark Tooth Fossil
Chondrichthyes (class) fossilized tooth
fossil
Apatite
Ca5(PO4)3(F,Cl,OH)
mineral
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Potassium Feldspar
Orthoclase (KAlSi3O8)
mineral
Pink Feldspar (Orthoclase)
Orthoclase Feldspar (KAlSi3O8)
mineral
Granitic Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Geode half
Geode (often quartz/chalcedony based)
sedimentary or igneous
Carved Sea Turtle Figurine (Aventurine / Quartz / Jasper)
Quartz variety (SiO2) / Polycrystalline Quartz Aggregate
mineral
Gneiss with Quartz Veining
Gneiss (High-grade Metamorphic Rock)
metamorphic
Fossil bone, possibly a large mammal long-bone fragment
Fossilized cortical bone; taxon indeterminate from the photograph
fossil
Shark Tooth Fossil
Vertebrate fossilized tooth (various genera such as Carcharodon, Otodus, or Negaprion)
fossil
Granite
Phaneritic Plutonic Felsic Rock
igneous
Yooperlite (Sodalite-bearing Syenite)
Sodalite-rich Syenite
igneous
Blue Apatite
Ca5(PO4)3(F,Cl,OH)
mineral
Granite
Intrusive igneous rock
igneous
Gneiss
Gneiss
metamorphic
Hemimorphite
Hemimorphite (Zn4Si2O7(OH)2·H2O)
mineral
Blue Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Rhodochrosite
Manganese carbonate (MnCO3)
mineral
Chrysocolla and Malachite Beads
Hydrated copper silicates (Chrysocolla) and Copper carbonate hydroxide (Malachite)
mineral
Quartz with Mineral Inclusions
Silicon Dioxide (SiO2)
mineral
Hematite
Iron(III) oxide (Fe2O3)
mineral
Quartz Mineral
Silicon Dioxide (SiO2)
mineral
Sandstone
SiO2 (predominantly quartz sand)
sedimentary
Schist
Schist (various mineralogical compositions including mica, chlorite, talc, etc.)
Metamorphic
Banded Gneiss (Variety of Gneiss)
Gneiss (specifically, a variety exhibiting prominent banding; mineral composition can vary, but often contains quartz, feldspar, mica, and amphibole)
Metamorphic Rock
Copper Ore Specimen
Cupriferous Rock / Malachite-bearing ore
mineral
Chrysocolla on Matrix
Hydrated copper silicates ((Cu,Al)2H2Si2O5(OH)4·nH2O)
mineral
Fossilized Gastropod / Coral
Phylum Mollusca / Cnidaria (Silicified or Calcified)
fossil
Sedimentary Sandstone with Iron Oxide
Ferruginous Sandstone
sedimentary
Pyrite
Iron Sulfide (FeS2)
mineral
Gneiss
Gneiss
metamorphic
Rainbow Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral