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

Blue aventurine quartz (likely dyed or tumbled quartzite)

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

Red Tiger's Eye

Pseudomorph of Macrocrystalline Quartz after Crocidolite (SiO2)

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

Silicon Dioxide (SiO2) with artificial coloration

Dyed Pink Quartzite (Jadeite Simulant)

Silicon Dioxide (SiO2) with organic dye

Dyed Imperial Jasper (Sea Sediment Jasper)

Silicon Dioxide (SiO2) - Impure Quartz/Chalcedony

Rose Quartz and Milky Quartz

Silicon Dioxide (SiO2)

Dyed agate geode slice

Banded chalcedony (microcrystalline SiO₂), commonly sold as a dyed agate slice

Polished brecciated jasper or iron-rich chert

Silica-rich microcrystalline quartz (SiO₂), with iron-oxide/hydroxide staining; exact identification requires testing

Pink Dyed Agate (Banded Chalcedony)

Silicon dioxide (SiO2) - variety Chalcedony

Smoky Quartz

Silicon Dioxide (SiO2) with aluminum impurities

Dyed Agate Geode (Pink/Magenta)

Silicon Dioxide (SiO2) - variety of Chalcedony/Quartz

Blue Dyed Agate

Silicon Dioxide (SiO2) with artificial pigment

Tumbled carnelian (orange chalcedony)

Carnelian, a microcrystalline variety of quartz; silicon dioxide (SiO₂) colored mainly by iron oxides

Slag Glass

Amorphous Silica Glass (with metal oxide inclusions)

Turquoise (Blue Howlite / Magnesite imitation)

CuAl6(PO4)4(OH)8·4H2O (for natural Turquoise); Ca2B5SiO9(OH)5 (for Howlite)

Polished blue obsidian with a pale mineral crust

Obsidian (volcanic glass), likely coated or encrusted with quartz/calcite

Carnelian and Dyed Agate

Chalcedony (Silicon Dioxide, SiO2)

Picture Jasper

SiO2

Dyed Blue Agate

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Weathered iron-rich sandstone or ferruginous quartzite

Ferruginous sandstone, likely quartz-rich (SiO₂ with iron oxides/hydroxides)

Goldstone

Man-made glass infused with copper particles

Smoky Quartz

Silicon Dioxide (SiO2)

Iron-rich slag or ironstone; appearance is not diagnostic

Likely iron-oxide-rich material (hematite, Fe₂O₃, and/or magnetite, Fe₃O₄); possibly smelting slag

Polished blue-green glassy slag or coated mineral fragment

Most likely man-made colored glass/slag; exact composition cannot be determined visually

Amethyst (Agate/Chalcedony variety)

Silicon Dioxide (SiO2) with iron impurities

Dyed Agate Geode

Silicon Dioxide (SiO2) with artificial pigment

Metallic Ornament / Jewelry

N/A - This is an artificial object, not a geological specimen.

Dyed Blue Agate

Silicon Dioxide (SiO2) with artificial cobalt-based dye

Dyed Agate

Silicon Dioxide (SiO2) with artificial pigment

Dyed Agate

Agate (SiO2)

Slag (Industrial Byproduct)

Ferro-silicate glass (Slag)

Tumbled chalcedony (likely carnelian or common agate)

Microcrystalline quartz, SiO₂; chalcedony variety

Lemon Quartz

Silicon Dioxide (SiO2)

Blue Agate (Dyed)

Silicon Dioxide (SiO2) with artificial pigment

Blue dyed mineral or stone fragment (identity uncertain)

Not reliably identifiable from the image; possibly dyed quartz or another porous stone

Likely iron meteorite

Iron–nickel meteorite, commonly octahedrite (kamacite–taenite)

Weathered iron-rich rock, possibly laterite or ironstone

Goethite–hematite-rich ferruginous rock; uncertain without testing

Blue Crackle Quartz (Dyed Quarzite)

Silicon Dioxide (SiO2) with artificial dye

Dyed Blue Agate Slice

Silicon Dioxide (SiO2)

Weathered iron-rich chert or jasper

Microcrystalline quartz (SiO₂), variably stained by iron oxides/hydroxides

Dyed Aura Quartz

Silicon Dioxide (SiO2) with metallic coating

Likely iron meteorite fragment

Iron–nickel meteorite, probably kamacite with taenite; identification is uncertain from the photo alone