Mineral (Tectosilicate)

Limonite

FeO(OH)•nH2O

Red Sandstone (Iron-stained)

Clastic sedimentary rock (primarily Quartz with Iron Oxides)

Turquoise

Hydrated phosphate of copper and aluminium - CuAl6(PO4)4(OH)8·4H2O

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

Granite with Quartz Vein

Intrusive igneous rock with quartz hydrothermal vein

Turquoise

CuAl6(PO4)4(OH)8·4H2O

Limonite

FeO(OH)·nH2O

Selenite (variety of Gypsum)

Calcium sulfate dihydrate (CaSO4·2H2O)

Chrysocolla-bearing copper ore

Primarily chrysocolla, a hydrated copper silicate (approx. Cu₂−xAlx(H₂−xSi₂O₅)(OH)₄·nH₂O); exact identification is uncertain from the image.

Likely amphibolite

Amphibolite, composed chiefly of hornblende (amphibole) and plagioclase feldspar

Tumbled amethyst (likely)

Quartz, SiO₂; purple variety known as amethyst

Quartz (Smoky/Brown variety)

Silicon dioxide (SiO2)

Fuchsite

Chromium-rich Muscovite Mica

Limonite Geode / Ironstone Concretion

Hydrated Iron Oxide (FeO(OH)·nH2O)

Azurite with Malachite

Azurite: Cu3(CO3)2(OH)2 / Malachite: Cu2CO3(OH)2

Epidote

Epidote (Ca2(Al2,Fe3+)(SiO4)(Si2O7)O(OH))

Azurite in Matrix

Azurite (Cu3(CO3)2(OH)2)

Quartz-rich pegmatite fragment

Granite-family pegmatite; chiefly quartz (SiO₂), feldspar, and black mica (biotite)

Limonite (Iron Ore)

Limonite (FeO(OH)·nH2O)

Raw greenish-blue quartz-bearing mineral specimen

Likely fluorite or chalcedony/quartz; exact identification requires hardness and crystal tests

Rough red garnets

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

Vein-filled Basalt

Plagioclase-pyroxene volcanic rock with calcite veins

Weathered fossil bone fragment

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

Serpentinite (likely)

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

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

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)

Small metallic-looking rock fragment

Uncertain; possibly galena-bearing ore or mica-rich schist

Magnetite

Magnetite (Fe3O4)

Granitic Gneiss

Gneiss (High-grade metamorphic rock)

Gneiss

Gneiss

Gneiss

Gneiss

Olivine (Peridot)

Magnesium Iron Silicate (Mg,Fe)2SiO4

Quartz–calcite sulfide-bearing mineral specimen

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

Small dark metallic-looking mineral grain, possibly magnetite

Magnetite (Fe₃O₄), tentative identification

Likely smoky quartz

Quartz (SiO₂), probably smoky variety

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

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