Desert Rose
Gypsum / Barite rosette (CaSO4·2H2O)
mineral
Category
Mineral (Evaporite)
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Desert Rose
Gypsum / Barite rosette (CaSO4·2H2O)
mineral
Small gray-green tumbled stone, likely serpentine
Serpentine-group minerals, approximately Mg₃Si₂O₅(OH)₄; identification is uncertain from the image alone
metamorphic
Likely serpentine
Serpentine-group minerals, chiefly antigorite, lizardite, or chrysotile; approximate formula Mg₃Si₂O₅(OH)₄
metamorphic
Gypsum
Gypsum (CaSO4·2H2O)
mineral
Pyrite or Chalcopyrite specimen (Gold-colored mineral coating)
Iron Sulfide (FeS2) / Copper Iron Sulfide (CuFeS2)
mineral
Likely rough garnet crystal
Garnet group, possibly almandine (Fe₃Al₂(SiO₄)₃)
mineral
Desert Rose
Baryte (BaSO4) or Gypsum (CaSO4·2H2O) with sand inclusions
mineral
Green Fluorite
Calcium Fluoride (CaF2)
mineral
Fluorite
Calcium Fluoride (CaF2)
mineral
Rainbow Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Serpentinite
Serpentinite, a rock composed mainly of serpentine-group minerals (approximately Mg₃Si₂O₅(OH)₄)
metamorphic
Orthoclase Feldspar (Granitic)
KAlSi3O8 (Potassium Feldspar)
igneous
Raw dark metallic mineral specimen, possibly native gold-bearing quartz or sulfide ore
Uncertain from image; possible pyrite/chalcopyrite-bearing quartz or gold-bearing sulfide matrix
mineral
Limonite
FeO(OH)•nH2O
mineral
Weathered, iron-stained granite (possible granitic gneiss)
Granite, a quartz–feldspar–mica plutonic rock; visual identification is uncertain
igneous
Pink Granite Gneiss
Gneiss (High-grade metamorphic rock)
metamorphic
Polished garnet bead (likely almandine)
Almandine garnet, Fe₃Al₂(SiO₄)₃ (tentative visual identification)
gemstone
Potassium Feldspar (Orthoclase)
Orthoclase (KAlSi3O8)
mineral
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
mineral
Possible weathered metallic mineral specimen
Uncertain; possibly native copper-bearing rock or iron sulfide in a gray host matrix
mineral
Granite
Felsic intrusive igneous rock
igneous
Lepidolite
K(Li,Al)3(Al,Si,4)10(O,F,OH)2
mineral
Fuchsite
K(Al,Cr)2(AlSi3O10)(OH)2
mineral
Quartz with Sericite and Cinnabar
Silicon Dioxide (SiO2) with muscovite/sericite and mercury sulfide (HgS)
mineral
Rhodochrosite
Manganese carbonate (MnCO3)
mineral
Chrysocolla and Malachite Beads
Hydrated copper silicates (Chrysocolla) and Copper carbonate hydroxide (Malachite)
mineral
Limonite
FeO(OH)•nH2O
mineral
Copper-bearing Quartz Vein in Host Rock
Quartz with Malachite/Chrysocolla staining
igneous/metamorphic with mineral
Druzy Quartz on Limestone
Silicon Dioxide (SiO2)
mineral
Lepidolite
K(Li,Al)3(Si,Al)4O10(F,OH)2
mineral
Granite (likely weathered, coarse-grained specimen)
Granite; chiefly quartz, feldspar, and mica
igneous
Serpentine (rough serpentine-rich rock)
Serpentine-group minerals, chiefly antigorite and/or lizardite; composition broadly Mg₃Si₂O₅(OH)₄
metamorphic
Halite
Sodium Chloride (NaCl)
mineral
Chrysocolla-bearing copper ore (tentative)
Chrysocolla, a hydrated copper silicate; commonly intergrown with quartz and/or other copper minerals
mineral
Granite
Granite, a felsic intrusive igneous rock composed chiefly of quartz, feldspar, and mica
igneous
Granite with Epidote
Granite, containing quartz, feldspar, and epidote
Igneous
Banded Gneiss
Gneiss (Felsic to Mafic Metamorphic Rock)
metamorphic
Likely rough garnet
Garnet group, possibly almandine (Fe₃Al₂(SiO₄)₃); identification is uncertain from the image
mineral
Likely garnet crystal fragment
Garnet-group mineral, possibly almandine (Fe₃Al₂(SiO₄)₃)
mineral
Weathered granite boulder
Granite, a coarse-grained felsic intrusive igneous rock composed mainly of quartz, feldspar, and mica
igneous
Mica Schist
Metamorphic rock dominated by micas (muscovite, biotite)
metamorphic