Sedimentary (Artificial)

Banded Agate (Dyed)

Silicon Dioxide (SiO2) with impurities

Blue resin-coated or dyed stone cabochon

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

Iridescent bismuth crystal

Bismuth (Bi), commonly laboratory-grown and oxide-coated

Industrial slag (iron/copper smelting slag)

Multiphase vitreous metallurgical slag; commonly iron-silicate glass with metal-oxide and metallic inclusions

Blue Agate (Dyed)

Silicon Dioxide (SiO2)

Green sea glass (likely bottle glass)

Man-made soda-lime silicate glass; not a natural mineral

Yellow Quartz (possibly dyed)

Silicon Dioxide (SiO2)

Slag (Industrial Byproduct)

Anthropogenic Vitreous Silicate material

Sphalerite in Matrix (Polished Point)

Zinc sulfide (Zn,Fe)S

Peacock Ore (Bournite/Chalcopyrite)

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

Banded Agate (Dyed)

SiO2 (Silicon Dioxide / Microcrystalline Quartz)

Bornite (Peacock Ore) / Acid-treated Chalcopyrite

Bornite (Cu5FeS4) or Chalcopyrite (CuFeS2)

Tumbled milky quartz

Quartz, silicon dioxide (SiO₂)

Blue Dyed Agate

Cryptocrystalline Quartz (SiO2)

Dyed Pink Agate (Crackled)

Silicon Dioxide (SiO2) - Chalcedony variety

Blue Dyed Agate Geode

Chalcedony (cryptocrystalline Quartz), SiO2

Pumice or vesicular volcanic rock

Pumice; predominantly volcanic glass (silica-rich, commonly rhyolitic to dacitic)

Tumbled smoky quartz

Quartz, silicon dioxide (SiO₂), smoky variety colored by irradiation-related defects

Tumbled smoky quartz

Quartz (SiO₂), smoky variety

Peacock ore (bornite/chalcopyrite specimen)

Bornite, Cu₅FeS₄, commonly with chalcopyrite (CuFeS₂)

Polished basalt with chalcedony/agate vein

Basalt (fine-grained mafic volcanic rock) with microcrystalline quartz, SiO₂

Likely granitic rock fragment

Granite or granodiorite; quartz–feldspar–mica aggregate

Bornite (Peacock Ore)

Bornite (Cu5FeS4)

Rainbow Quartz (Fire and Ice Quartz)

Silicon Dioxide (SiO2)

Tumbled milky chalcedony (likely common opalite-like quartz)

Chalcedony, microcrystalline SiO₂; possibly pale common opal, hydrated SiO₂·nH₂O

Cullet Glass (Slag Glass)

Amorphous Silicon Dioxide (SiO2) with metallic oxide impurities

Polished black stone sphere (likely black basalt or black tourmaline)

Most likely fine-grained basalt (plagioclase–pyroxene); mineral identification is uncertain from the image alone

Dyed Blue Agate Slice

Silicon Dioxide (SiO2)

Dyed Blue Agate

Cryptocrystalline Quartz (SiO2)

Dyed turquoise-colored lava stone beads

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

Tumbled goldstone-like quartz pebble

Likely iron-stained quartz or jasper; exact identification requires testing

Polished pink gemstone, likely dyed quartz or chalcedony

Uncertain from image; possibilities include dyed quartz (SiO₂) or chalcedony (microcrystalline SiO₂)

Tumbled milky quartz pebble

Quartz (silicon dioxide, SiO₂)

Tumbled green aventurine (probable)

Quartzite dominated by quartz (SiO₂), with green mica/fuchsite or chlorite inclusions

Citrine (Heat-Treated Amethyst)

Quartz (SiO2)

Polished black-and-gold mineral fragment, likely chalcopyrite

Chalcopyrite (CuFeS₂), possibly tarnished or coated

Unknown metallic sulfide-bearing rock, possibly chalcopyrite or bornite

Tentative: chalcopyrite (CuFeS₂) or bornite (Cu₅FeS₄)

Orange chalcedony or weathered quartz pebble

Microcrystalline quartz, SiO₂; possibly iron-oxide-stained chalcedony

Blue Agate (Dyed)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Blue Agate (Tumbled and Dyed)

Silicon Dioxide (SiO2) with likely organic dyes

Copper-bearing sulfide ore, likely chalcopyrite with iron oxides

Chalcopyrite (CuFeS₂), possibly associated with bornite (Cu₅FeS₄), pyrite, and limonite/goethite

Scoria (vesicular basalt)

Scoria; vesicular mafic volcanic rock, commonly basaltic in composition