Sedimentary (Artificial)

Goldstone

Not a natural mineral or rock. It is an ornamental glass.

Green chalcedony (likely dyed or treated)

Chalcedony, microcrystalline quartz (SiO₂)

Smoky quartz

Quartz, silicon dioxide (SiO₂), smoky variety

Smoky Quartz

SiO2 (Silicon Dioxide with aluminum impurities)

Quartz crystal cluster

Quartz (silicon dioxide, SiO₂), likely pale amethyst or iron-stained quartz

Agate (Dyed Blue)

SiO2 (Silicon Dioxide)

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

Dyed blue quartz or druzy geode (likely)

Quartz, silicon dioxide (SiO₂), probably artificially colored

Dyed Agate

Agate (Cryptocrystalline Quartz), SiO2

Iridescent chalcopyrite (“peacock ore”)

Chalcopyrite, CuFeS₂, commonly surface-oxidized to covellite and related copper sulfides

Obsidian

Volcanic glass, primarily SiO₂ (noncrystalline)

Peacock ore (iridescent chalcopyrite)

Chalcopyrite, CuFeS₂, commonly surface-treated to enhance iridescence

Tumbled metallic sulfide specimen, likely chalcopyrite

Chalcopyrite (CuFeS₂), possibly polished or coated

Likely chalcopyrite-bearing sulfide ore

Chalcopyrite (CuFeS₂), possibly with pyrite and secondary copper minerals

Heat-Treated Citrine (Amethyst)

Silicon Dioxide (SiO2) with iron impurities

Aura Quartz (Pink/Rose Aura Quartz)

Silicon Dioxide (SiO2) bonded with Platinum and/or Silver

Agate

Agate (Silicon Dioxide, SiO2)

Goldstone (blue-goldstone–style glass) beads

Artificial aventurine glass, typically silica glass with copper inclusions; not a natural mineral

Tumbled brown agate or jasper pebble

Microcrystalline quartz, chiefly chalcedony (SiO₂), possibly iron-stained jasper

Blue chalcedony (likely dyed or coated)

Microcrystalline quartz, SiO₂ (chalcedony)

Bismuth

Bismuth (Bi)

Bismuth crystal

Bismuth (Bi), synthetic laboratory-grown crystal

Crackle Quartz (Dyed)

SiO2 (Silicon Dioxide) - Treated

Dyed blue howlite (turquoise imitation), possibly dyed magnesite

Howlite: Ca₂B₅SiO₉(OH)₅; the vivid blue color is artificial dye. Exact identification is uncertain from the photograph alone.

Red-and-white porphyritic granite fragment

Granite, likely alkali-feldspar granite; quartz + feldspar with minor mafic minerals

Smoky Quartz

Silicon Dioxide (SiO2)

Weathered copper-bearing sulfide rock (likely bornite/chalcopyrite)

Bornite (Cu5FeS4) and/or chalcopyrite (CuFeS2), with oxidation tarnish

Dyed and polished agate beads

Chalcedony (microcrystalline quartz), SiO₂; commonly agate

Blue Obsidian

Volcanic Glass (SiO2 with inclusions)

Peacock Ore

Bornite (Cu5FeS4)

Black Onyx

Onyx (Silicon Dioxide, SiO2)

Dyed and polished crackle agate bead

Agate, microcrystalline quartz (SiO₂), commonly artificially crackled and dyed

Polished blue agate geode slice

Banded chalcedony (microcrystalline SiO₂), commonly quartz with blue dye or enhancement

Basalt (likely vesicular basalt)

Basalt; predominantly plagioclase, clinopyroxene, and olivine, with possible volcanic glass

Tiger’s eye

Quartz variety, primarily silicon dioxide (SiO₂); fibrous quartz pseudomorph after crocidolite asbestos

Bornite (Peacock Ore)

Bornite (Cu5FeS4)

Smoky Quartz (Chlorite Inclusions)

Silicon Dioxide (SiO2) with trace Aluminum and Natural Irradiation

Vesicular basalt (possibly industrial slag)

Basalt, chiefly plagioclase + pyroxene ± olivine; exact identification is uncertain from the image

Peacock ore (iridescent chalcopyrite), likely heat-treated

Chalcopyrite, CuFeS₂; commonly sold as artificially oxidized “peacock ore”

Dyed and polished banded agate (likely blue agate)

Microcrystalline quartz, SiO₂ (chalcedony/agate), artificially blue-dyed