Man Made Material (Jewelry, Metal Alloy)

Small brown rock fragment; exact identification uncertain

Unidentified fine-grained lithic fragment

Gemstone butterfly brooch/pendant

Likely faceted pink tourmaline or synthetic spinel in gilt metal; exact identification requires testing

Green aventurine bead bracelet

Quartz (SiO₂), typically green quartzite/aventurine colored by fuchsite mica or other inclusions

Native Copper

Native Copper (Cu)

Turquoise bracelet

Turquoise, CuAl₆(PO₄)₄(OH)₈·4H₂O

Blue Sapphire (Synthetic or Man-made Glass Imitation)

Corundum (Al2O3) if natural; Lead-glass or Spinal if synthetic

Blue glassy tumbled stone, likely blue chalcedony or slag glass

Chalcedony (microcrystalline SiO₂), possibly man-made blue glass

Green glassy mineral specimen, likely rough emerald or green fluorite

Tentatively beryl (Be₃Al₂Si₆O₁₈), emerald variety; synthetic/man-made glass cannot be excluded from the photograph

Likely marcasite jewelry (metal brooch and earrings)

Marcasite, FeS₂ (often pyrite or marcasite stones set in silver)

Celestite (Celestine)

Strontium sulfate (SrSO4)

Bismuth

Bismuth (Bi)

Fired Clay Brick (Anthropic Rock substitute)

Anthropogenic polycrystalline ceramic (predominantly Mullite and Quartz: Al6Si2O13 + SiO2)

Native copper-bearing rock

Native copper (Cu), likely with copper oxides/carbonates in a host rock

Green gemstone in a jewelry setting (possibly emerald or green glass)

Not identifiable from the image; if natural emerald, beryl (Be₃Al₂Si₆O₁₈)

Polished banded agate pendant

Agate, a microcrystalline variety of chalcedony (SiO₂)

Gold

Native Gold (Au)

Amber (likely a small polished amber piece)

Natural fossil resin; amber is an organic mineraloid, not a crystalline mineral. The image alone cannot confirm authenticity.

Carved Stone Turtle

Carved Soapstone and Quartz

Terrazzo (with Marble and Granite fragments)

Cementitious or resinous composite containing Calcium Carbonate (CaCO3) and Silicates

Baked-clay ceramic fragment (likely brick or pottery)

Fired clay, primarily aluminosilicate minerals; not a natural rock

Conglomerate

Conglomerate Rock (Paraconglomerate)

Sandstone Concretion

Clastic sedimentary rock (primarily Quartz SiO2)

Red heart-shaped glass bead in a wire-wrapped jewelry charm

Likely colored glass (amorphous silica-based material); the image does not show an identifiable geological specimen

Milky Quartz

Silicon Dioxide (SiO2)

Buffalo Nickel (Indian Head Nickel)

Cupronickel (75% Copper, 25% Nickel)

Iron Meteorite

Siderite (Iron-Nickel alloy)

Silicon

Element Si

Likely iron meteorite fragment

Iron–nickel meteorite, commonly kamacite–taenite (Fe–Ni alloy)

Green aventurine pendant

Quartz variety, SiO₂, colored mainly by fuchsite or other chromium-bearing mica inclusions

Moissanite

Silicon Carbide (SiC)

Green agate (likely dyed), used as jewelry beads

Microcrystalline quartz, SiO₂ (chalcedony; agate variety)

Titanium Aura Quartz (Aura Quartz)

Titanium-coated Silicon Dioxide (SiO2)

Polished orange chalcedony pendant

Chalcedony, microcrystalline quartz (SiO₂), likely orange carnelian or orange agate

Turquoise cabochon

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

Faceted colored gemstones, likely synthetic corundum or glass imitations

Not identifiable from the image; possible synthetic corundum (Al₂O₃)

Color-change gemstone ring (stone possibly alexandrite or a synthetic imitation)

Undetermined from the image; alexandrite is chrysoberyl, BeAl₂O₄

Gemstone ring (stone appears pale yellow, possibly citrine or glass imitation)

Undetermined; possible quartz variety citrine (SiO₂)

Tumbled carnelian

Carnelian, a red-orange variety of chalcedony (microcrystalline quartz, SiO₂)

Beaded stone necklace, likely yellow agate or chalcedony

Chalcedony (microcrystalline quartz, SiO₂); exact stone cannot be confirmed from the photo

Peridot (Olivine)

Olivine ((Mg, Fe)2SiO4)

Blue tumbled glass-like specimen; likely blue slag glass

Likely man-made glass (silicate glass), not a natural mineral; exact material cannot be confirmed from the image

Aura Quartz Bead

Silicon dioxide (SiO2) with metal coating