Sedimentary (Artificial)

Angel Aura Quartz

Silicon dioxide treated with precious metals (SiO2)

Tumbled quartz pebble

Quartz (silicon dioxide, SiO₂), likely milky or smoky quartz

Likely tumbled brown stone

Indeterminate; possibly jasper, chert, or iron-stained quartzite

Dyed Agate / Ruby Quartz

SiO2 (Silicon Dioxide)

Blue Howlite

Dyed Howlite (Ca2B5SiO9(OH)5)

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)

Sphalerite in Matrix (Polished Point)

Zinc sulfide (Zn,Fe)S

Tumbled blue-green stone, likely dyed agate

Agate (microcrystalline quartz, SiO₂); blue coloration may be artificial

Green sea glass (likely bottle glass)

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

Dyed turquoise-colored lava stone beads

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

Blue Dyed Agate

Cryptocrystalline Quartz (SiO2)

Dyed Pink Agate (Crackled)

Silicon Dioxide (SiO2) - Chalcedony variety

Tumbled peach agate

Microcrystalline quartz (SiO₂), chalcedony variety; likely agate

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 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

Blue Agate (Dyed)

Silicon Dioxide (SiO2)

Pumice or vesicular volcanic rock

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

Dyed druzy quartz pendant

Quartz, SiO₂; likely a dyed druzy quartz cluster

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)

Tumbled goldstone-like quartz pebble

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

Blue Dyed Agate Geode

Chalcedony (cryptocrystalline Quartz), 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

Rainbow Quartz (Fire and Ice Quartz)

Silicon Dioxide (SiO2)

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)

Blue Agate (Dyed)

Silicon Dioxide (SiO2) - Cryptocrystalline Quartz

Blue Agate (Tumbled and Dyed)

Silicon Dioxide (SiO2) with likely organic dyes

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)

Scoria (vesicular basalt)

Scoria; vesicular mafic volcanic rock, commonly basaltic in composition