Mineral

Likely garnet (rough, dark-red variety)

Garnet group; possibly almandine, Fe₃Al₂(SiO₄)₃

Likely mica schist

Mica-rich schist, probably biotite–quartz–feldspar schist

Weathered conglomeratic rock, likely iron-stained sandstone

Probable ferruginous, clast-bearing sandstone; exact identification requires examination of a fresh surface

Copper-bearing altered rock, likely chrysocolla-bearing quartzite or breccia

Quartz (SiO₂) with copper silicate minerals, chiefly chrysocolla [approximately (Cu,Al)₂H₂Si₂O₅(OH)₄·nH₂O], and iron oxides

Granite

Intrusive Igneous Rock

Granite with Quartz Vein

Intrusive igneous rock with quartz hydrothermal vein

Pearl jewelry

Pearl (biogenic calcium carbonate, primarily aragonite, CaCO₃)

Quartz crystal cluster (likely iron-stained quartz)

Quartz, silicon dioxide (SiO₂), with possible iron-oxide inclusions

Blue apatite (likely dyed or enhanced)

Apatite group; fluorapatite, Ca5(PO4)3F, is the common blue variety

Rough red garnets

Garnet-group minerals, likely almandine (Fe₃Al₂(SiO₄)₃) or pyrope–almandine; species cannot be confirmed from the photo alone

Limonite (Iron Ore)

Limonite (FeO(OH)·nH2O)

Blue-green glassy mineral specimen, likely aquamarine or pale fluorite

Tentatively beryl (Be₃Al₂Si₆O₁₈), aquamarine variety; identification is uncertain from the photograph

Gneiss (rounded cobble)

Quartz–feldspar–mica gneiss; exact mineral proportions cannot be determined from the image

Gabbro (Water-Worn Pebble)

Gabbro (Plagioclase Feldspar and Pyroxene)

Magnetite

Magnetite (Fe3O4)

Granitic Gneiss

Gneiss (High-grade metamorphic rock)

Gneiss

Gneiss

Gneiss

Gneiss

Hematite (likely Botryoidal or Specularite variant)

Iron(III) oxide (Fe2O3)

Hematite

Iron(III) oxide (Fe2O3)

Hematite

Hematite (Iron(III) oxide, Fe2O3)

Native Copper Nugget

Native Copper (Cu)

Geode (Calcite or Quartz)

Silicon Dioxide (SiO2) or Calcium Carbonate (CaCO3)

Sandstone

Arenite

Blue Chalcedony

Silicon Dioxide (SiO2)

Pyrite (Fool's Gold)

Iron Sulfide (FeS2)

Tumbled serpentine (likely bowenite)

Serpentine-group minerals, chiefly antigorite/lizardite; commonly Mg₃Si₂O₅(OH)₄

Quartz–calcite sulfide-bearing mineral specimen

Quartz (SiO₂) with likely calcite (CaCO₃) and iron sulfides, possibly pyrite (FeS₂); exact species requires testing

Serpentinite (likely)

Serpentinite, composed mainly of serpentine-group minerals such as antigorite, lizardite, or chrysotile

Weathered fossil bone fragment

Fossilized vertebrate bone; taxon and age cannot be determined from the image

Tyrannosaurus Rex Fossil Skull

Tyrannosaurus rex

Granite

Felsic intrusive igneous rock

Fossil bone, possibly a vertebra

Fossilized vertebrate bone; exact taxon cannot be determined from the image

Fossil Shark Tooth

Carcharocles (Otodus) sp. or similar fossilized Chondrichthyes tooth

Limonite

FeO(OH)·nH2O

Selenite (variety of Gypsum)

Calcium sulfate dihydrate (CaSO4·2H2O)

Small dark metallic-looking mineral grain, possibly magnetite

Magnetite (Fe₃O₄), tentative identification

Pegmatite, probably mica-rich

Granitic pegmatite composed mainly of quartz, feldspar, and mica (likely biotite and/or muscovite)

Weathered granitic rock

Granite (quartz–feldspar–mica intrusive rock; exact variety uncertain)

Gneiss

Gneiss (High-grade Regional Metamorphic Rock)

Gneiss

Gneiss

Gneiss (likely Granitic Gneiss)

Gneiss