Mineral (Evaporite)

Chalcopyrite

CuFeS2

Hematite

Hematite (Fe2O3)

Muscovite

KAl2(AlSi3O10)(OH)2

Pyrite

Iron Sulfide (FeS2)

Quartz crystal cluster

Quartz (silicon dioxide, SiO₂), likely milky or druzy quartz

Faceted red garnet

Garnet group, likely almandine (Fe₃Al₂(SiO₄)₃)

Faceted garnet bead necklace

Garnet group, likely almandine (Fe₃Al₂(SiO₄)₃); exact species cannot be confirmed from the image

Rounded, weathered stone (likely basaltic or andesitic river cobble)

Fine-grained mafic to intermediate volcanic rock; exact identification requires examination of a fresh surface

Yellow Topaz

Al2SiO4(F,OH)2

Blue-green copper mineral (possibly chrysocolla or turquoise)

Undetermined from the image; chrysocolla is a hydrated copper silicate, Cu₂H₂O₅Si, while turquoise is CuAl₆(PO₄)₄(OH)₈·4H₂O

Chalcedony (Botryoidal)

Silicon Dioxide (SiO2)

Tumbled Mixed Gemstones and Rocks

Various mineral species including quartz (SiO2) and silicate minerals

Fluorite

Calcium fluoride (CaF2)

Jade (likely Jadeite)

Jadeite (a pyroxene mineral) or Nephrite (a variety of amphibole mineral)

Small brown mineral or rock fragment

Undetermined; the image does not show enough detail for reliable identification

Rounded, mottled pebble (likely granitoid)

Probable granitic or dioritic rock; exact identification requires closer inspection

Quartz Vein in Sedimentary Rock

Silicon Dioxide (SiO2) with host Chert or Limestone

Blue apatite specimen

Apatite-group mineral, commonly fluorapatite (Ca₅(PO₄)₃F)

Shark Tooth Fossil

Carcharocles megalodon or similar fossilized elasmobranch tooth

Pegmatite

Igneous Pegmatite

Kaolinite (clay mineral)

Kaolinite, Al₂Si₂O₅(OH)₄

Unidentified polished mineral specimen

Indeterminate; likely a pale feldspar or quartz-bearing material

Travertine

Calcium Carbonate (CaCO3)

Limonite (Yellow Ochre)

Hydrated iron(III) oxide-hydroxides (FeO(OH)·nH2O)

Limonite (Iron Ore)

Hydrated Iron(III) Oxide-Hydroxide (FeO(OH)·nH2O)

Tumbled yellow-green stone, possibly serpentine

Serpentine-group minerals, commonly antigorite or lizardite; identification from the image is uncertain

Celestite (Celestine)

Strontium sulfate (SrSO4)

Likely feldspar (rough specimen)

Probably potassium feldspar, KAlSi₃O₈; exact identification is uncertain from the image

Desert Rose

Gypsum (variety Selenite) or Barite: CaSO4 · 2H2O

Quartz

Silicon Dioxide (SiO2)

Epidote

Ca2(Al,Fe)3(SiO4)3(OH)

Feldspar

Feldspar Group (Tectosilicate)

Quartz Crystal

Silicon Dioxide (SiO2)

Muscovite

KAl2(AlSi3O10)(OH)2

Kyanite

Al2SiO5

Pyrite

Iron Sulfide (FeS2)

Pyrite

Iron Sulfide (FeS2)

Malachite with Quartz

Cu2CO3(OH)2 / SiO2

Limonite

FeO(OH)·nH2O

K-Feldspar

Potassium Feldspar (KAlSi3O8)

Pyrite with Quartz

Iron Sulfide (FeS2) with Silicon Dioxide (SiO2)

Pyrite

Iron Sulfide (FeS2)