Sedimentary (Artificial)

Tumbled blue-green stone, likely dyed agate

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

Turquoise-colored stone bead necklace

Likely turquoise (CuAl₆(PO₄)₄(OH)₈·4H₂O), but the bead may be dyed or another blue-green stone

Tumbled greenstone or serpentine pebble

Likely serpentinite, composed mainly of serpentine-group minerals (antigorite/lizardite); identification is uncertain from the image alone

Clear quartz crystal point

Quartz (silicon dioxide, SiO₂), likely a polished or cut crystal

Rose Quartz

Silicon Dioxide (SiO2) with traces of titanium, iron, or manganese

Tumbled quartz pebble

Quartz, silicon dioxide (SiO₂), likely milky quartz

Possible tumbled jasper or iron-rich chert

Microcrystalline quartz (SiO₂), commonly colored by iron oxides

Citrine quartz crystal

Quartz, silicon dioxide (SiO₂); yellow variety commonly called citrine

Blue Dyed Agate Geode (Slice)

Silicon Dioxide (SiO2) - Chalcedony / Quartz

Dyed Agate Geode Slice

Silicon Dioxide (SiO2)

Blue Quartzite (Dyed)

Metamorphosed Quartz-rich Sandstone (SiO2 with organic dye)

Glass

Amorphous Silicon Dioxide (SiO2)

Smoky quartz (likely faceted cabochon or rough fragment)

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

Peacock Ore

Bornite (Cu5FeS4)

Smoky Quartz

Silicon Dioxide (SiO2) with aluminum impurities

Bornite (“peacock ore”), likely weathered copper sulfide

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

Scoria (vesicular volcanic rock)

Basaltic scoria; chiefly plagioclase, pyroxene, olivine, and volcanic glass

Aura Quartz (Cranberry or Magenta Aura Quartz)

Silicon dioxide coated with titanium/niobium (SiO2)

Tumbled chalcedony (likely agate or jasper fragment)

Microcrystalline quartz, SiO₂ (chalcedony)

Pink Quartz (likely dyed)

Silicon Dioxide (SiO2)

Dyed green agate pendant

Microcrystalline quartz (chalcedony), SiO₂; likely dyed agate

Dyed Howlite (simulating Lavender/Purple Jade or Charoite)

Howlite: Ca2B5SiO9(OH)5 (when natural)

Tumbled chalcopyrite (likely)

Chalcopyrite, CuFeS₂

Metallic sulfide mineral fragment, likely bornite or chalcopyrite

Bornite (Cu₅FeS₄) or chalcopyrite (CuFeS₂)

Tumbled fossil-bearing limestone (likely crinoid or shell fragment)

Fossil carbonate; predominantly calcite (CaCO₃)

Copper-bearing sulfide ore, possibly chalcopyrite-rich

Chalcopyrite (CuFeS₂), possibly with bornite and oxidation products

Smoky quartz crystal (tentative)

Quartz, silicon dioxide (SiO₂), likely smoky variety

Smoky quartz

Quartz, silicon dioxide (SiO₂), brown to gray variety

Smoky Quartz

Silicon Dioxide (SiO2)

Dyed Dalmatian Jasper (Dalmatian Stone)

Perthitic Feldspar with Arfvedsonite inclusions

Heat-Treated Citrine (Amethyst)

Silicon Dioxide (SiO2) with iron impurities

Heat-Treated Amethyst (Commercial Citrine)

Silicon Dioxide (SiO2) with iron impurities

Heated Citrine (Heat-Treated Amethyst)

Silicon Dioxide (SiO2), quartz variety

Polished blue stone, likely sodalite or dyed agate

Sodalite: Na₈(Al₆Si₆O₂₄)Cl₂; exact identification requires testing

Green aventurine (likely dyed quartzite)

Quartzite, predominantly quartz (SiO₂), colored by fuchsite mica or artificial dye

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)

Dyed blue chalcedony (likely dyed quartz pebble)

Chalcedony, microcrystalline quartz (SiO₂), artificially colored

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)

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

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