Copper Ore Specimen
Cupriferous Rock / Malachite-bearing ore
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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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
Fossilized Gastropod / Coral
Phylum Mollusca / Cnidaria (Silicified or Calcified)
fossil
Rainbow Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Chrysocolla on Matrix
Hydrated copper silicates ((Cu,Al)2H2Si2O5(OH)4·nH2O)
mineral
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
mineral
Gneiss
Gneiss
metamorphic
Microcline Feldspar (Amazonite or White Feldspar)
KAlSi3O8
mineral
Small pale mineral fragment
Unidentified; possibly quartz, calcite, or feldspar
mineral
Sedimentary Sandstone with Iron Oxide
Ferruginous Sandstone
sedimentary
Limonite
Hydrous ferric oxides (FeO(OH)·nH2O)
sedimentary
Potassium Feldspar (Orthoclase)
Orthoclase (KAlSi3O8)
mineral
Orthoclase Feldspar (Potassium Feldspar)
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Pyrite
Iron Sulfide (FeS2)
mineral
Raw greenish-blue quartz-bearing mineral specimen
Likely fluorite or chalcedony/quartz; exact identification requires hardness and crystal tests
mineral
Sandstone
Sandstone (composed primarily of sand-sized minerals or rock grains)
sedimentary
Magnetite
Fe3O4 (Iron(II,III) oxide)
mineral
Amethyst
Quartz (Silicon Dioxide, SiO2)
gemstone
Basalt with Secondary Mineralization (Likely Zeolites or Calcite)
Aphanitic mafic volcanic rock with secondary mineral inclusions (e.g., CaAl2Si3O10·3H2O for Scolecite)
igneous
Granite
Phaneritic Felsic Igneous Rock
igneous
Unknown Rock Fragment
Unknown
unknown
Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Chalcopyrite
Copper Iron Sulfide (CuFeS2)
mineral
Satin Spar (Gypsum)
Calcium Sulfate Dihydrate (CaSO4·2H2O)
mineral
Limonite / Ironstone
Limonite (Hydrated Iron Oxide) - FeO(OH)·nH2O
mineral
Tumbled Mixed Gemstones and Rocks
Various mineral species including quartz (SiO2) and silicate minerals
mineral
Fluorite (Fluor-spar)
Calcium Fluoride (CaF2)
mineral
Fluorite with Quartz
Fluorite (CaF2) and Quartz (SiO2)
mineral
Drill Core Samples (Varied Lithology)
Multi-lithological core samples (containing potential granite, marble, and phyllite/schist sequence)
igneous, sedimentary, and metamorphic
Ruby (Raw Corundum)
Al2O3 (Aluminum Oxide)
mineral
Schist
Mica Schist
metamorphic
Quartz in Limonite-rich Matrix
Silicon Dioxide (SiO2) with Goethite/Limonite FeO(OH)·nH2O
Mineral in Sedimentary/Secondary host
Granite
Granite (composed of Quartz, Feldspar, and Mica)
igneous
Magnetite (Lodestone)
Iron(II,III) oxide (Fe3O4)
mineral
Granite
Granite
Igneous
Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Amethyst
Amethyst (Silicon Dioxide, SiO2)
mineral
Rhodochrosite
Manganese Carbonate (MnCO3)
mineral
Granite
Intrusive Igneous Rock
igneous
Amygdaloidal Basalt
Amygdaloidal Basalt (containing quartz/agate or zeolite fill)
igneous