Sedimentary (If Natural Jasper) Or Artificial (If Slag)

Dyed Agate Slice

Silicon Dioxide (SiO2) - variety of Chalcedony

Dyed Howlite (simulating Lavender/Purple Jade or Charoite)

Howlite: Ca2B5SiO9(OH)5 (when natural)

Tumbled jasper or chert

Microcrystalline quartz (SiO₂), likely jasper/chert

Dyed Agate (Tumbled)

Silicon Dioxide (Chalcedony variety, artificially dyed)

Dyed Blue Agate Druzy Pendant

Quartz / Chalcedony (SiO2) with artificial color treatment

Jasper

Silicon Dioxide (SiO2) microcrystalline quartz

Dyed Agate (Dragon Vein Agate Bead)

Silicon dioxide (SiO2) variety Chalcedony

Likely blue-green glassy slag or a weathered mineral fragment

Unidentified; the image does not show diagnostic features sufficient for a mineral identification

Tumbled blue jasper or blue-dyed jasper

Microcrystalline quartz (chalcedony), SiO₂; blue coloration may be natural or dye-enhanced

Smoky Quartz

Silicon Dioxide (SiO2)

Blue resin-coated or dyed stone cabochon

Likely dyed chalcedony/agate (microcrystalline quartz, SiO₂); exact material is uncertain from the image

Green sea glass (likely slag glass or bottle glass)

Man-made soda-lime silicate glass; not a naturally occurring mineral

Dzi Bead (Agate Bead)

Cryptocrystalline Quartz (SiO2) - Chalcedony/Agate

Citrine (Heat-Treated Amethyst)

Quartz (SiO2)

Dyed Crackle Quartz (Green)

Quenching-treated Quartz (Silicon Dioxide, SiO2)

Slag Glass

Vitreous Silicate Residue

Likely quartz-rich rock fragment

Quartz (SiO₂), possibly a fragment of quartzite or silica-rich slag

Unidentified polished dark stone with a possible quartz fragment

Indeterminate; appearance may reflect polished basalt, obsidian, or iron-rich rock, with a pale quartz/feldspar inclusion

Tumbled smoky quartz

Quartz (SiO₂), brown smoky variety

Iridescent bismuth crystal

Bismuth (Bi), artificially crystallized

Iron-rich vesicular rock, possibly slag or weathered basalt

Identification uncertain; likely ferruginous basalt/ironstone, with possible anthropogenic iron slag

Slag Glass

Anthropogenic Amorphous Silicon Dioxide

Iridescent bismuth crystal

Bismuth (Bi), commonly laboratory-grown and oxidized

Polished basalt pebble

Basalt, a fine-grained mafic volcanic rock composed chiefly of plagioclase and pyroxene, commonly with olivine

Possible tumbled jasper or iron-rich chert

Microcrystalline quartz (SiO₂), commonly colored by iron oxides

Blue glassy gemstone cabochon, likely dyed chalcedony or glass

Uncertain; possible dyed chalcedony (microcrystalline quartz, SiO₂)

Dyed Purple Agate

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Dyed Pink Dragon Vein Agate

Silicon Dioxide (SiO2) with artificial dye additives

Likely iron-rich rock or weathered metallic mineral fragment

Uncertain; possibly limonite/goethite or iron-bearing slag

Native metal specimen, likely galena or metallic slag

Probably galena (lead sulfide, PbS); identification is uncertain from the image alone

Blue Quartzite (Dyed)

Silicon Dioxide (SiO2) with inclusions

Blue Agate

Silicon Dioxide (SiO2)

Red Tiger's Eye

Silicon dioxide with iron oxides, SiO2

Red chalcedony (likely dyed or heat-treated)

Microcrystalline quartz, SiO₂; possibly red agate/carnelian

Dyed Agate

Microcrystalline Quartz (SiO2) with artificial pigment

Aura Quartz

Titanium-coated Silicon Dioxide (SiO2)

Pet Rock (Quartzite/Sandstone River Rock)

Silicon Dioxide (SiO2) mixture

Dyed turquoise-colored lava stone beads

Vesicular basalt (scoria), commonly sold as dyed lava rock

Yellow chert or jasper pebble

Microcrystalline quartz (SiO₂), likely iron-oxide-stained chert/jasper

Tumbled tektite (likely Indonesian or Philippine tektite)

Natural silica-rich impact glass; chiefly SiO₂ with minor Al₂O₃, FeO, MgO, CaO, and Na₂O

Tumbled jasper, likely red/brown jasper

Microcrystalline quartz (chalcedony), SiO₂, colored by iron oxides

Dyed Agate Slice

Chalcedony (Silicon Dioxide, SiO2) with artificial pigment