Layered metamorphic rock, possibly banded gneiss
Gneiss (tentative; exact identification requires closer examination)
metamorphic
Category
Mineral (Evaporite)
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Banded metamorphic rock, likely gneiss
Foliated quartz–feldspar rock (gneiss; exact identification requires closer examination)
metamorphic
Apatite
Fluorapatite (Ca5(PO4)3F)
mineral
Desert Rose (Gypsum Rose)
Gypsum (CaSO4·2H2O)
mineral
Desert Rose (Baryte/Gypsum Rosette)
Baryte (BaSO4) or Gypsum (CaSO4·2H2O)
mineral
Tumbled pink granite
Granite, composed mainly of quartz, potassium feldspar, plagioclase, and dark mica or amphibole
igneous
Tumbled quartz-rich pebble (likely quartzite or vein quartz)
Quartz (SiO₂), possibly quartzite with minor iron-oxide staining
metamorphic
Fluorite (Fluor-spar)
Calcium Fluoride (CaF2)
mineral
Fluorite with Quartz
Fluorite (CaF2) and Quartz (SiO2)
mineral
Unidentified dark metallic sulfide specimen
Possibly pyrite-, chalcopyrite-, or galena-bearing ore; exact identification requires testing
mineral
Botryoidal Hematite
Iron(III) oxide (Fe2O3)
mineral
Vanadinite
Lead Chlorovanadate, Pb5(VO4)3Cl
mineral
Quartz and Mixed Minerals
Silicon Dioxide (SiO2)
mineral
Quartz with Associated Minerals
Silicon Dioxide (SiO2)
mineral
Quartz in Limonite-rich Matrix
Silicon Dioxide (SiO2) with Goethite/Limonite FeO(OH)·nH2O
Mineral in Sedimentary/Secondary host
Green schist
Chlorite–mica schist, likely containing quartz and feldspar
metamorphic
Tumbled green stone, possibly serpentine
Likely serpentine-group rock (mainly serpentine minerals; identification uncertain from the image)
metamorphic
Dark green schist (probable chlorite/actinolite schist)
Chlorite–actinolite schist; exact mineral identification requires testing
metamorphic
Limonite
FeO(OH)•nH2O
mineral
Limonite
FeO(OH)·nH2O
mineral
Limonite
FeO(OH)•nH2O
mineral
Desert Rose
Gypsum (Selenite) Barite, CaSO4·2H2O
mineral
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
Blue sodalite (likely)
Sodalite, Na₈(Al₆Si₆O₂₄)Cl₂
mineral
Dendritic Quartz Pebble
Silicon Dioxide (SiO2) with Manganese/Iron oxide inclusions
mineral
Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Amygdaloidal Basalt
Mafic extrusive igneous rock with secondary mineral infills
igneous
Granite
Granite, a coarse-grained felsic intrusive igneous rock composed mainly of quartz, feldspar, and mica
igneous
Polished granite or gneiss stone
Granite, chiefly quartz, feldspar, and dark mica/amphibole; exact identification is uncertain from the photograph
igneous
Fossilized Gastropod / Coral
Phylum Mollusca / Cnidaria (Silicified or Calcified)
fossil
Aquamarine with Muscovite
Beryllium Aluminum Silicate (Be3Al2Si6O18) with Muscovite Mica
mineral
Limonite
FeO(OH)·nH2O
mineral
Limonite
FeO(OH)·nH2O
mineral
Limonite
FeO(OH)•nH2O
mineral
Limonite
FeO(OH)·nH2O
mineral
Limonite
FeO(OH)•nH2O
mineral
Limonite
FeO(OH)•nH2O
mineral
Magnetite
Fe3O4 (Iron(II,III) oxide)
mineral
Hematite
Hematite (Fe2O3)
mineral
Lepidolite
K(Li,Al)3(Al,Si,3O10)(F,OH)2
mineral
Galena with Quartz
Lead sulfide (PbS) associated with Silicon dioxide (SiO2)
mineral