Synthetic Resin (Artificial Specimen)
Polyurethane or Polyester Resin
mineraloid (man-made)
Category
Mineral (Extraterrestrial)
Browse mineral (extraterrestrial) specimens identified by the Rock Identifier community.
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Likely rough garnet
Garnet group, possibly almandine (Fe₃Al₂(SiO₄)₃); identification is uncertain from the image
mineral
Limonite
FeO(OH)·n(H2O)
mineral
Mica Schist
Metamorphic rock dominated by micas (muscovite, biotite)
metamorphic
Quartz-rich rock, likely milky quartz vein material
Quartz (SiO₂), possibly with iron-oxide staining and minor associated minerals
mineral
Iron-stained brown mineral/rock fragment
Most likely limonite/goethite-rich material (hydrated iron oxides), possibly weathered ironstone; exact identification requires testing
mineral
Blue-gray mineral specimen (possibly sodalite)
Undetermined; appearance may be consistent with sodalite (Na₈Al₆Si₆O₂₄Cl₂), but the image is insufficient for reliable identification
mineral
Weathered granite
Granite, a quartz–feldspar–mica intrusive igneous rock
igneous
Banded Gneiss (River Rock/Pebble)
Gneiss (specifically a banded variety often found as a river rock)
Metamorphic Rock
Likely garnet (rough crystal)
Garnet group; possibly almandine, (Fe₃Al₂(SiO₄)₃)
mineral
Weathered feldspar-rich pegmatite (likely orthoclase or plagioclase)
Granitic pegmatite; predominantly K-feldspar/plagioclase (KAlSi₃O₈–NaAlSi₃O₈), with quartz and dark mafic minerals
igneous
Chalcopyrite
Copper iron sulfide (CuFeS2)
mineral
Rhodochrosite
Manganese carbonate (MnCO3)
mineral
Chrysocolla and Malachite Beads
Hydrated copper silicates (Chrysocolla) and Copper carbonate hydroxide (Malachite)
mineral
Sandstone with Mineral Veining or Crust
Sedimentary Sandstone (mostly SiO2 with Fe2O3 tinting)
sedimentary
Likely garnet crystal fragment
Garnet-group mineral, possibly almandine (Fe₃Al₂(SiO₄)₃)
mineral
Quartz-bearing pegmatitic rock with feldspar
Granitic pegmatite; chiefly quartz (SiO₂), feldspar, and mica
igneous
Likely garnet crystal
Garnet-group silicate; species cannot be determined from the image
mineral
Yooperlite (Sodalite-bearing Syenite)
Sodalite-rich Syenite
igneous
Gneiss with Quartz Veining
Gneiss (High-grade Metamorphic Rock)
metamorphic
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
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Orthoclase Feldspar with Quartz
Orthoclase (KAlSi3O8)
mineral
Banded gneiss
Foliated gneiss, likely quartz–feldspar–biotite or amphibole gneiss
metamorphic
Granitic Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Carved Sea Turtle Figurine (Aventurine / Quartz / Jasper)
Quartz variety (SiO2) / Polycrystalline Quartz Aggregate
mineral
Orthoclase Feldspar
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
Dark mineral nodule with white veining
Possibly a calcite-veined manganese- or iron-rich concretion; exact identification requires testing
mineral
Sedimentary Sandstone with Iron Oxide
Ferruginous Sandstone
sedimentary
Granite
Intrusive igneous rock
igneous
Gneiss
Gneiss
metamorphic
Banded Sedimentary Rock
Sedimentary rock with mineral veins/banding
sedimentary
Geode half
Geode (often quartz/chalcedony based)
sedimentary or igneous
Quartz-rich pegmatite (milky quartz with feldspar)
Quartz (SiO₂)–feldspar pegmatite, likely containing albite or orthoclase
igneous
Pyrite
Iron Sulfide (FeS2)
mineral
Apatite
Ca5(PO4)3(F,Cl,OH)
mineral
Rainbow Fluorite
Calcium Fluoride (CaF2)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Apatite
Fluorapatite, Chlorapatite, and Hydroxylapatite (Ca5(PO4)3(F,Cl,OH))
mineral