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

Native American Hammerstone / Pitted Stone

Modified lithic artifact (often quartzite, basalt, or granite)

Iridescent bismuth crystal

Bismuth (Bi), artificially crystallized

Orbicular jasper (likely ocean jasper)

Silica-rich microcrystalline quartz/chalcedony with iron-oxide and other mineral inclusions; commonly classified as orbicular jasper

Dyed Blue Agate Druzy Pendant

Quartz / Chalcedony (SiO2) with artificial color treatment

Dyed Purple Agate

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Dyed turquoise-colored lava stone beads

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

Aura Quartz

Titanium-coated Silicon Dioxide (SiO2)

Polished basalt pebble

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

Native metal specimen, likely galena or metallic slag

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

Tumbled jasper, likely red/brown jasper

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

Red jasper (tumbled)

Jasper, microcrystalline quartz/chalcedony (SiO₂) colored mainly by iron oxides

Tumbled chalcedony/agate (likely botryoidal variety)

Microcrystalline quartz, SiO₂; possibly druzy chalcedony or common agate

Aura Quartz Geode (Angel Aura Quartz)

Silicon Dioxide (SiO2) bonded with precious metals

Peacock ore (bornite/chalcopyrite specimen)

Bornite, Cu₅FeS₄, commonly with chalcopyrite (CuFeS₂)

Slag Glass

Vitreous Silicate Residue

Blue metallic mineral specimen, possibly bornite or chalcopyrite

Bornite (Cu₅FeS₄) or chalcopyrite (CuFeS₂); exact identification requires testing

Dyed Agate

Chalcedony (Silicon Dioxide, SiO2)

Tumbled quartz-rich pebble, likely jasper or chert

Microcrystalline quartz (SiO₂), possibly iron-stained jasper

Dyed Agate Slice

Chalcedony (Silicon Dioxide, SiO2) with artificial pigment

Dyed Pink Dragon Vein Agate

Silicon Dioxide (SiO2) with artificial dye additives

Green Obsidian Sphere (man-made glass)

Vitreous Silica with Chromium/Iron additives

Dragon Vein Agate (Dyed/Fractured Quartz)

Silicon dioxide (SiO2)

Slag Glass

Anthropogenic Amorphous Silicon Dioxide

Peridot (likely, given the color and bead form)

Olivine, variety Peridot (Mg,Fe)2SiO4

Yellow chert or jasper pebble

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

Orbicular jasper (ocean jasper-like jasper)

Microcrystalline quartz (SiO₂), commonly with iron-oxide and clay inclusions

Dyed Agate

SiO2

Tumbled tektite (likely Indonesian or Philippine tektite)

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

Blue Dyed Agate Geode (Slice)

Silicon Dioxide (SiO2) - Chalcedony / Quartz

Blue Slag Glass

Amorphous Silica (Industrial byproduct)

Heated Citrine (Heat-Treated Amethyst)

Silicon Dioxide (SiO2), quartz variety

Dyed Tumbled Quartz

Silicon Dioxide (SiO2)

Pet Rock (Quartzite/Sandstone River Rock)

Silicon Dioxide (SiO2) mixture

Likely tumbled jasper or agate

Microcrystalline quartz (SiO₂), possibly iron-rich jasper

Dyed Agate

Microcrystalline Quartz (SiO2) with artificial pigment

Man-made Slag (Industrial Byproduct)

Anthropogenic Glassy Residue

Citrine (Heat-Treated Amethyst)

Silicon Dioxide (SiO2)

Asphalt aggregate (crushed stone in bitumen)

Artificial composite; predominantly crushed granite, basalt, limestone, and/or recycled aggregate bound by bitumen

Cullet Glass (sometimes mistaken for Blue Obsidian or Slag)

Amorphous Silicon Dioxide (SiO2) with chemical additives (e.g., Cobalt for blue color)

Aura Quartz (Cranberry or Magenta Aura Quartz)

Silicon dioxide coated with titanium/niobium (SiO2)

Dark tumbled stone, possibly basalt

Basalt (fine-grained mafic volcanic rock; identification tentative from the image)

Dyed Agate

SiO2 (Silicon Dioxide)