Mineral (Man Enhanced)

Polished agate or chalcedony slice (uncertain)

Microcrystalline quartz, SiO₂; possibly fossil-bearing chalcedony

Red chalcedony (likely carnelian)

Chalcedony, microcrystalline quartz (SiO₂); red color commonly from iron oxides

Tumbled agate (likely Botswana or fortification agate)

Microcrystalline quartz, SiO₂ (chalcedony with banded impurities)

Aura Quartz (Coated Quartz)

Silicon Dioxide (SiO2) treated with metallic vapor

Banded agate beads

Agate, a microcrystalline variety of quartz (SiO₂)

Dyed, polished stone beads (likely assorted agate or jasper)

Microcrystalline quartz, SiO₂ (chalcedony; exact stones cannot be determined from the image)

Howlite and Purple Amethyst Druzy

Calcium Borosilicate Hydroxide (Howlite) and Silicon Dioxide (Quartz/Amethyst)

Tumbled brown pebble

Indeterminate; possibly weathered basalt or iron-stained quartzite

Polished agate geode

Chalcedony (microcrystalline SiO₂), commonly banded agate with drusy quartz and possible iron-oxide inclusions

Orange carnelian (possibly dyed agate) pendant

Cryptocrystalline quartz (chalcedony), SiO₂

Aura Quartz (Coated Quartz)

Silicon Dioxide (SiO2) coated with vaporized metals

Tumbled carnelian agate

Cryptocrystalline silica, primarily chalcedony (SiO₂), colored orange-red by iron oxides

Blue chalcedony (likely dyed or polished)

Microcrystalline quartz, SiO₂ (chalcedony variety)

Polished agate (likely carnelian or dyed red agate)

Chalcedony, microcrystalline quartz (SiO₂)

Tumbled carnelian/chalcedony

Cryptocrystalline quartz, SiO₂ (iron-bearing chalcedony)

Polished orbicular jasper (likely ocean jasper)

Siliceous microcrystalline quartz/chalcedony with iron-oxide and volcanic inclusions; commonly called ocean jasper

Polished blue banded agate slice

Chalcedony (microcrystalline quartz), SiO₂, commonly with trace iron and other coloring elements

Polished blue agate geode slice

Banded chalcedony (microcrystalline SiO₂), commonly quartz with blue dye or enhancement

Yellow-green aventurine or serpentine pendant

Most likely serpentine-group mineral (magnesium silicate), possibly quartz-rich aventurine

Polished carnelian (red-orange chalcedony)

Carnelian, a microcrystalline variety of quartz (SiO₂), commonly colored by iron oxides

Peacock Ore (Bornite or Chalcopyrite treated with acid)

Bornite (Cu5FeS4) or Acid-washed Chalcopyrite (CuFeS2)

Polished blue banded agate slice

Agate, a microcrystalline variety of quartz (SiO₂), commonly with chalcedony

Aura Quartz Geode

Titanium/Gold bonded Quartz (SiO2 with metallic coating)

Tumbled banded agate beads

Agate, microcrystalline quartz (SiO₂), a variety of chalcedony

Tumbled blue chalcedony (likely blue agate)

Microcrystalline quartz, SiO₂; chalcedony/agate variety

Blue lace agate (tumbled)

Microcrystalline quartz, SiO₂ (chalcedony variety)

Polished carnelian/chalcedony

Microcrystalline quartz (SiO₂), iron-oxide-colored chalcedony

Tumbled orange chalcedony or carnelian

Cryptocrystalline quartz, SiO₂; likely carnelian variety

Aragonite cluster (blue aragonite, likely copper-associated)

Aragonite, orthorhombic CaCO₃; blue color may reflect copper minerals or treatment

Banded agate geode fragment

Microcrystalline quartz (chalcedony), SiO₂

Chalcopyrite (Peacock Ore)

Copper Iron Sulfide (CuFeS2)

Polished brecciated jasper

Microcrystalline quartz (SiO₂) with hematite/goethite and pale chalcedony or feldspar inclusions

Opalite

Synthetic glass / Opalized glass

Carnelian (orange chalcedony)

Cryptocrystalline quartz, SiO₂; orange variety of chalcedony

Likely fluorescent mineral specimen

Uncertain; possibly willemite (Zn₂SiO₄) or fluorite (CaF₂)

Chalcopyrite (Peacock Ore)

Chalcopyrite (CuFeS2)

Turquoise cabochon jewelry

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

Polished jasper, likely orbicular or brecciated jasper

Jasper: microcrystalline quartz (chalcedony), SiO₂, colored by iron oxides and other inclusions

Tumbled yellow-orange chalcedony (likely carnelian)

Microcrystalline quartz, SiO₂; iron-bearing variety commonly called carnelian

Polished black agate slice

Chalcedony (microcrystalline quartz), SiO₂, with iron/manganese staining

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

Cryptocrystalline quartz (SiO₂), probably banded chalcedony/onyx

Tumbled pastel gemstone bead strand

Likely dyed or heat-treated quartz/chalcedony varieties, possibly rose quartz, amethyst, and agate