Man Made Material, Not A Natural Rock Or Mineral Specimen

Vesicular basalt (possibly scoriaceous basalt)

Vesicular basalt; chiefly plagioclase, pyroxene, and iron-rich oxides

Fossilized Burrow

Trace fossil (Ichnogenus)

Turquoise (likely stabilized or composite)

Turquoise, hydrated copper aluminum phosphate — CuAl₆(PO₄)₄(OH)₈·4H₂O

Corundum (Sapphire variant)

Aluminium oxide (Al2O3)

Yellow-brown stone or mineral fragment

Unidentified; the image does not show enough detail for a reliable identification

Turquoise cabochon pendant

Turquoise, hydrated copper aluminum phosphate — CuAl₆(PO₄)₄(OH)₈·4H₂O

Sandstone

Arenite (SiO2-rich)

Polished turquoise-like stone

Likely turquoise, hydrated copper–aluminum phosphate: CuAl₆(PO₄)₄(OH)₈·4H₂O; identification is uncertain from the photo

Sandstone

Clastic Sedimentary Rock

Tumbled yellow chalcedony (possibly citrine or pale agate)

Chalcedony, microcrystalline quartz (SiO₂); exact variety cannot be confirmed visually

Carved amethyst fluorite (likely)

Amethyst, purple variety of quartz (SiO₂), possibly with fluorite (CaF₂)

Banded agate tower (likely onyx/chalcedony)

Microcrystalline quartz, SiO₂; commonly called banded agate or black-and-white onyx

Rough Corundum (Sapphire/Ruby mixture)

Corundum (Aluminum Oxide, Al2O3)

Small rounded pebble, possibly quartz-rich stone

Indeterminate; likely quartz/quartzite or a weathered feldspathic pebble

Hematite cameo or hematine imitation

Hematite (Fe₂O₃); possibly synthetic hematine or black glass

Turquoise (small irregular fragment)

Turquoise, hydrated copper aluminum phosphate: CuAl₆(PO₄)₄(OH)₈·4H₂O

Sandstone (specifically Arkose or Ferruginous Sandstone)

Sandstone (SiO2 predominant)

Sandstone (Pebble)

Arenite (primarily SiO2)

Diamond (Cut and Polished)

Diamond (pure Carbon, C)

Jasper

Silicon dioxide (SiO2) with impurities

Dyed druzy agate/geode (likely dyed quartz)

Quartz, SiO₂, lining a chalcedony geode; vivid pink color appears artificially dyed

Aura Quartz / Rainbow Aura Quartz

Silicon Dioxide (SiO2) with metallic vapor coating

Tumbled granite or granitic gneiss

Granite: quartz, feldspar, and mica; possibly foliated gneiss

Crushed Stone / Gravel

Aggregatus saxum (variable mineral composition)

Sandstone

Arenite

Chert Arrowhead (Lithic Tool)

Microcrystalline quartz (SiO2) - Archeological lithic artifact

Sandstone

Arenite

Green glassy stone, possibly aventurine or green jade

Unidentifiable from the image; possible quartz-rich aventurine (SiO₂) or jadeite/nephrite

Sandstone (Quartzose)

Arenite (SiO2 principal)

Sandstone

Sandstone (SiO2-rich detrital sedimentary rock)

Mixed quartz gemstone bead bracelet

Quartz, silicon dioxide (SiO₂), in varieties including smoky quartz, amethyst, rutilated quartz, and possibly tourmalinated quartz

Sandstone

Clastic sedimentary rock (primarily Quartz and Feldspar)

Cowrie shell

Marine gastropod shell; likely a cowrie (family Cypraeidae), species not identifiable from the image

Tumbled chalcedony (likely milky quartz)

Microcrystalline quartz, SiO₂; possibly pale agate or quartzite

Iron Slag

Iron/Steel Slag (Ferrosilicate Glass)

Blue faceted gemstone ring, likely synthetic sapphire or blue topaz

Uncertain from image; possible corundum (Al₂O₃) or topaz (Al₂SiO₄(F,OH)₂)

Sandstone (Ferruginous)

Arenite (Fe-rich SiO2)

Chalk

Calcium Carbonate (CaCO3)

Diamond

Natural Diamond (Carbon, C)

Possible tektite or iron-rich slag-like natural specimen

Uncertain; possibly natural glass (tektite) or magnetite-rich rock

Sandstone

Arenite (primarily SiO2)

Tumbled brown-black stone, likely smoky quartz or iron-stained agate

Indeterminate from image; possible quartz (SiO₂), chalcedony, or iron-rich jasper