Mineral (Man Made Aura Treatment)

Blue-green aventurine beads (likely dyed or treated quartz)

Quartz, SiO₂; aventurine is quartz containing fine mineral inclusions

Tumbled yellowish quartz or chalcedony

Quartz/chalcedony, SiO₂

Tumbled banded tiger’s-eye

Quartz (SiO₂) with fibrous iron oxides, chiefly goethite and/or hematite

Tumbled pale-green quartz-like pebble

Likely quartz (SiO₂), possibly pale-green aventurine or prehnite; exact identification requires testing

Dyed Pink Dragon Vein Agate

Silicon Dioxide (SiO2) with artificial dye additives

Polished dendritic agate (likely moss or plume agate)

Microcrystalline quartz, chiefly chalcedony (SiO₂), with iron-oxide inclusions

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

Ruby (faceted gemstone in a ring)

Corundum, Al₂O₃; red color typically from trace chromium

Red agate-like polished stone (likely dyed chalcedony)

Chalcedony, microcrystalline SiO₂; possibly dyed quartz or glass imitation

Polished yellow chalcedony (likely lemon quartz/calcite alternative)

Microcrystalline quartz, SiO₂ (chalcedony); exact identification requires testing

Tumbled blue stone, likely blue aventurine or dyed quartzite

Quartz (SiO₂), likely with inclusions or artificial dye; exact identification requires testing

Green Aventurine

Quartz (SiO2) with Fuchsite inclusions

Goldstone (Brown)

Aventurine glass

Blue aventurine quartz (likely dyed or tumbled quartzite)

Quartz, silicon dioxide (SiO₂), with blue coloration from inclusions or dye

Polished red-orange agate and pale porous mineral specimen

Agate (microcrystalline quartz, SiO₂); upper piece likely calcite or aragonite, but identification is uncertain from the image

Green tumbled agate (likely green chalcedony)

Chalcedony, microcrystalline quartz (SiO₂); exact identification is uncertain from the photo

Asphalt Pavement (with aggregate)

Asphalt concrete

Botryoidal calcite (likely calcite concretion)

Calcite, calcium carbonate (CaCO₃)

Tumbled quartz pebble (likely milky quartz or chalcedony)

Quartz, SiO₂; possibly microcrystalline quartz (chalcedony)

Tumbled carnelian (red-orange chalcedony)

Carnelian, a microcrystalline variety of quartz; SiO₂

Carnelian (orange chalcedony)

Cryptocrystalline quartz, SiO₂; orange variety of chalcedony

Smoky Quartz

Silicon Dioxide (SiO2)

Yellow Sapphire (Raw)

Corundum (Al2O3)

Luminous Stone (Glow-in-the-dark Synthetic/Man-made Stone)

Strontium Aluminate tinted glass or resin (Crystalline silicate/oxide mix)

Polished turquoise sphere with purple matrix/inclusion

Turquoise, hydrated copper–aluminum phosphate; approximate formula CuAl₆(PO₄)₄(OH)₈·4H₂O

Tumbled blue chalcedony (likely blue agate)

Microcrystalline quartz, SiO₂; chalcedony with possible agate banding

Green Calcite

Calcium Carbonate (CaCO3)

Calcite

Calcium Carbonate (CaCO3)

Tumbled blue-gray chalcedony (likely common agate/chalcedony)

Microcrystalline quartz, SiO₂ (chalcedony; possibly pale blue agate)

Dyed and polished agate pebble

Microcrystalline quartz (SiO₂), likely chalcedony/agate with blue dye

Tumbled black-and-white banded stone, likely onyx or agate

Cryptocrystalline quartz (SiO₂), probably banded chalcedony/onyx

Fluorescent tumbled mineral specimen, likely calcite

Calcite (calcium carbonate, CaCO₃), probable UV-fluorescent variety

Diamond (in a jewelry setting)

Diamond (Carbon, C)

Dyed Chalcedony (Agate)

Silicon Dioxide (SiO2) with artificial pigment

Synthetic Resin (Artificial Specimen)

Polyurethane or Polyester Resin

Yellow cabochon gemstone, likely citrine or yellow glass imitation

Quartz (SiO₂), if natural citrine; visual evidence is insufficient to exclude man-made glass or resin

Polished green-and-black banded cabochon (likely malachite imitation or dyed agate)

Uncertain; possible malachite (Cu₂CO₃(OH)₂), banded agate (SiO₂), or man-made glass

Fossil shell fragment

Likely a fossilized brachiopod or bivalve; exact taxon cannot be determined from the image

Crackle Glass (Simulated Gemstone)

Amorphous Solid (SiO2)

Blue chalcedony (likely dyed or coated)

Microcrystalline quartz, SiO₂ (chalcedony)

Titanium Quartz (Rough)

Titanium-included Silicon Dioxide (SiO2 + Ti)

Tumbled yellow quartz, likely citrine or iron-stained quartz

Quartz (SiO₂), possibly citrine variety