Chlorite-rich schist (probable greenschist)
Greenschist-facies metabasalt or chlorite–actinolite schist
metamorphic
Category
Mineral (Evaporite)
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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
Desert Rose
Gypsum (Calcium Sulfate Dihydrate, CaSO4·2H2O) or Barite (Barium Sulfate, BaSO4)
mineral
Rainbow Fluorite
Fluorite (Calcium Fluoride, CaF2)
mineral
Native Copper
Copper (Cu)
mineral
Yellow Ochre / Limonite
Hydrated ferric oxide (FeO(OH)·nH2O)
mineral
Quartz Mineral
Silicon Dioxide (SiO2)
mineral
Rhodochrosite
Manganese Carbonate (MnCO3)
mineral
Unknown Rock Fragment
Unknown
unknown
Drill Core Samples (Varied Lithology)
Multi-lithological core samples (containing potential granite, marble, and phyllite/schist sequence)
igneous, sedimentary, and metamorphic
Amethyst
Amethyst (Silicon Dioxide, SiO2)
mineral
Desert Rose
Gypsum (CaSO4-2H2O) or Baryte (BaSO4)
mineral
Quartz Mineral
Silicon Dioxide (SiO2)
mineral
Sandstone
SiO2 (predominantly quartz sand)
sedimentary
Orthoclase Feldspar
Orthoclase (KAlSi3O8)
mineral
Quartz–feldspar pegmatite mineral specimen
Quartz (SiO₂) with potassium feldspar, albite, mica, and likely garnet or tourmaline
igneous
White Quartz Crystal Cluster
Silicon Dioxide (SiO2)
mineral
Unidentified dark mineral/rock fragment
Indeterminate; appearance may fit a sulfide-bearing rock or iron-rich mineral
mineral
Marble
Recrystallized Calcite (CaCO3)
metamorphic
Carved serpentine pendant
Serpentine-group minerals, commonly antigorite/lizardite (Mg₃Si₂O₅(OH)₄), possibly mixed with chlorite or other inclusions
mineral
Potassium Feldspar (Orthoclase)
Orthoclase (KAlSi3O8)
mineral
Orthoclase Feldspar (Potassium Feldspar)
KAlSi3O8 (Potassium Aluminum Silicate)
mineral
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
Copper Ore Specimen
Cupriferous Rock / Malachite-bearing ore
mineral
Gneiss
Gneiss (Metamorphic Rock)
metamorphic
Unidentified dark metallic sulfide specimen
Possibly pyrite-, chalcopyrite-, or galena-bearing ore; exact identification requires testing
mineral
Fluorite and Mineral Collection
Calcium Fluoride (CaF2)
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
Ruby (Raw Corundum)
Al2O3 (Aluminum Oxide)
mineral
Tumbled quartz-rich pebble (likely quartzite or vein quartz)
Quartz (SiO₂), possibly quartzite with minor iron-oxide staining
metamorphic
Desert Rose
Gypsum (CaSO4·2H2O) or Baryte (BaSO4) rosette
mineral
Likely weathered granite or granitic gneiss
Quartz–feldspar–mica rock; possibly gneissic granite
igneous
Desert Rose (also known as Sand Rose)
Gypsum (CaSO4·2H2O) or Barite (BaSO4) with sand inclusions
mineral
Rhodochrosite
Manganese Carbonate (MnCO3)
mineral
Fossilized Gastropod / Coral
Phylum Mollusca / Cnidaria (Silicified or Calcified)
fossil
Quartz in Limonite-rich Matrix
Silicon Dioxide (SiO2) with Goethite/Limonite FeO(OH)·nH2O
Mineral in Sedimentary/Secondary host