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

Amethyst-rich vesicular volcanic rock (probable amethyst basalt/scoria)

Quartz (SiO₂) in vesicular basaltic volcanic rock; precise identification requires testing

Carnelian and Dyed Agate

Chalcedony (Silicon Dioxide, SiO2)

Pink Dyed Agate

Chalcedony (SiO2) with artificial dyes

Aluminum Slag

Anthropogenic Aluminum (Al)

Tumbled yellow calcite

Calcite (CaCO₃), likely honey/yellow calcite

Pink Dyed Agate (Banded Chalcedony)

Silicon dioxide (SiO2) - variety Chalcedony

Smoky Quartz

Silicon Dioxide (SiO2)

Blue Agate Geode (Dyed)

Cryptocrystalline Quartz (SiO2)

Dyed Agate

Silicon Dioxide (SiO2)

Dyed Blue Agate Slice

Silicon Dioxide (SiO2) with artificial dye

Amethyst geode slices

Amethyst, purple quartz (SiO₂)

Slag Glass

Vitreous Silicate Residue

Pink Dyed Agate (Pink Agate Slice)

Silicon Dioxide (SiO2) - Chalcedony / Cryptocrystalline Quartz

Dyed Blue Quartz

Silicon Dioxide (SiO2) with artificial pigment

Smoky Quartz

Silicon Dioxide (SiO2)

Dyed Agate

Silicon Dioxide (SiO2)

Blue Howlite (Dyed)

Calcium Borosilicate Hydroxide (Ca2B5SiO9(OH)5)

Concrete or artificial stone core sample

Artificial conglomerate

Turquoise

Turquoise (Hydrated phosphate of copper and aluminium), CuAl6(PO4)4(OH)8·4H2O

Rose Quartz and Milky Quartz

Silicon Dioxide (SiO2)

Tumbled milky quartz pebble

Quartz (silicon dioxide, SiO₂), opaque-to-translucent milky variety

Blue Slag Glass

Ferro-silicate glass (Slag)

Blue Onyx (Dyed Agate/Chalky Chalcedony)

Silicon Dioxide (SiO2) with artificial pigment

Dyed Agate

Agate (SiO2)

Citrine

Silicon dioxide (SiO2)

Black tumbled stone, likely basalt or black jasper

Most consistent with fine-grained basalt (mainly plagioclase and pyroxene); exact identification requires testing

Possible iron-rich basalt or industrial slag

Basalt, likely Fe–Mg silicate rock; exact identification is uncertain from the blurred image

Quartzite with Iron Inclusions

Quartzite (pre d om i n a n t l y SiO2) with H e m a t i t e / G o e t h i t e

Dyed Aura Quartz

Silicon Dioxide (SiO2) with metallic coating

Sandstone with Liesegang Rings

Quartzose Sandstone with Iron Oxide Precipitation

Carnelian Agate

SiO2 (Silicon Dioxide - Chalcedony variant)

Peridot (likely, given the color and bead form)

Olivine, variety Peridot (Mg,Fe)2SiO4

Dragon Vein Agate (Dyed)

SiO2

Smoky Quartz

Silicon Dioxide (SiO2)

Tumbled dark green stone, likely serpentine or greenstone

Serpentinite (hydrated magnesium silicate minerals, chiefly antigorite/lizardite); possible chlorite-rich greenstone

Pink Banded Agate (Dyed)

Chalcedony (cryptocrystalline silica), chemical formula SiO2

Green Slag Glass

Amorphous Silica / Glassy Blast Furnace Slag

Citrine (Heat-Treated Amethyst)

Quartz (SiO2)

Blue Chalcedony (Agate)

Silicon Dioxide (SiO2)

Leland Blue Stone

Anthropogenic Iron Smelting Slag

Smoky Quartz

Silicon Dioxide (SiO2)

Man-made Green Quartz (Lab-grown or Treated)

Silicon Dioxide (SiO2) with artificial coloration