Sedimentary (Artificial)

Peacock ore

Iridescent chalcopyrite, commonly marketed as bornite

Iridescent quartz-bearing rock, likely bornite/chalcopyrite-bearing quartzite

Quartz (SiO₂) with probable chalcopyrite (CuFeS₂) and/or bornite (Cu₅FeS₄)

Smoky Quartz

Silicon Dioxide (SiO2)

Tumbled quartz-rich feldspathic rock, possibly granite or granitic gneiss

Quartz–feldspar aggregate; likely granitoid (quartz + feldspar ± mica and iron-oxide staining)

Tumbled quartz crystal (likely smoky or iron-stained quartz)

Quartz, silicon dioxide (SiO₂)

Chalcopyrite (Peacock Ore)

Copper Iron Sulfide (CuFeS2)

Citrine (Iron-stained Quartz)

Silicon Dioxide (SiO2)

Polished blue-green metallic mineral specimen, likely bornite (“peacock ore”)

Bornite, Cu₅FeS₄; possibly chalcopyrite, CuFeS₂, with iridescent tarnish

Banded Agate

Silicon Dioxide (SiO2) - Microcrystalline Quartz

Vesicular basalt (likely iron-rich scoria)

Basaltic volcanic rock; chiefly plagioclase, clinopyroxene, olivine, and Fe-Ti oxides

Blue Tiger's Eye (Hawk's Eye)

Pseudomorph of Quartz after Crocidolite (SiO2)

Blue Dyed Agate

Chalcedony (cryptocrystalline variety of Quartz), SiO2

Dyed Blue Agate (Slab)

Agate (Variety of Chalcedony/Microcrystalline Quartz), SiO2

Tourmalinated quartz crystal point

Quartz (SiO₂) with black tourmaline (schorl, NaFe₃Al₆(BO₃)₃Si₆O₁₈(OH)₄) inclusions

Likely yellow quartz gemstone ring

Quartz (SiO₂), possibly heat-treated citrine or lemon quartz; metal setting appears to be brass/gold-colored alloy

Tumbled green aventurine (probable)

Quartz (SiO₂) with fuchsite or other green mica inclusions

Tumbled pink granite

Granite, chiefly quartz, alkali feldspar, and plagioclase with minor mica/amphibole

Tumbled milky quartz pebble

Quartz, silicon dioxide (SiO₂)

Mystic Topaz

Al2SiO4(F,OH)2 (Coated)

Dyed druzy quartz geode

Quartz, silicon dioxide (SiO₂), likely artificially dyed

Tumbled blue stone, likely blue aventurine or dyed quartzite

Quartz (SiO₂), likely with inclusions or artificial dye; exact identification requires testing

Tumbled smoky quartz

Quartz, silicon dioxide (SiO₂), brown variety colored by irradiation and trace aluminum

Smoky quartz crystal

Quartz, silicon dioxide (SiO₂), likely smoky variety

Possible chalcopyrite-bearing sulfide fragment

Likely chalcopyrite (CuFeS₂), possibly with pyrite or bornite

Bornite (Peacock Ore)

Bornite (Cu5FeS4)

Likely iron meteorite

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

Amethyst geode

Quartz, SiO₂; purple variety: amethyst

Green fluorite tower

Fluorite (calcium fluoride, CaF₂)

Polished dark stone, likely basalt

Basalt, a fine-grained mafic volcanic rock composed mainly of plagioclase feldspar and pyroxene, with possible olivine and magnetite

Basalt cobble

Fine-grained mafic volcanic rock, chiefly plagioclase and pyroxene, commonly with olivine

Likely raw chalcopyrite or bornite specimen

Chalcopyrite (CuFeS₂), possibly bornite (Cu₅FeS₄)

Tumbled smoky quartz (probable)

Quartz, silicon dioxide (SiO₂), smoky variety

Red agate (possibly dyed chalcedony)

Chalcedony, microcrystalline SiO₂; agate is banded chalcedony

Black onyx or black agate bead necklace

Microcrystalline quartz, SiO₂ (likely chalcedony/black agate; possibly dyed)

Heat-Treated Citrine

Silicon Dioxide (SiO2) with iron impurities

Heat-Treated Citrine (Amethyst)

Silicon Dioxide (SiO2) with iron impurities

Dyed agate (likely dyed chalcedony)

Microcrystalline quartz, SiO₂ (chalcedony/agate)

Tumbled blue-green stone, likely chrysocolla or dyed chalcedony

Probable chrysocolla (hydrated copper aluminosilicate; variable composition), though appearance could also represent dyed chalcedony

Heat-Treated Citrine (Amethyst Cathedral with Agate inclusions)

Silicon Dioxide (SiO2) with iron impurities

Iridescent bismuth crystal

Bismuth (Bi), artificially crystallized and likely oxidized/coated

Ruby in Zoisite (Anyolite) or possibly a dyed stone/agate

Anyolite (Ruby in green zoisite) or artificially altered chalcedony

Rainbow chalcopyrite (“peacock ore”)

Chalcopyrite, CuFeS₂, commonly artificially tarnished or heat-treated