Sedimentary (Artificial)

Blue Agate (likely dyed)

Silicon Dioxide (SiO2)

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

Smoky Quartz

SiO2 (Silicon Dioxide)

Agate (Dyed Blue)

SiO2 (Silicon Dioxide)

Smoky Quartz

Silicon Dioxide (SiO2)

Mystic Topaz

Al2SiO4(F,OH)2 (Coated)

Agate

Agate (Silicon Dioxide, SiO2)

Bismuth

Bismuth (Bi)

Heat-Treated Citrine (Amethyst)

Silicon Dioxide (SiO2) with iron impurities

Peacock Ore

Bornite (Cu5FeS4)

Black Onyx

Onyx (Silicon Dioxide, SiO2)

Blue Obsidian

Volcanic Glass (SiO2 with inclusions)

Crackle Quartz (Dyed)

SiO2 (Silicon Dioxide) - Treated

Goldstone

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

Aura Quartz (Pink/Rose Aura Quartz)

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

Bornite (Peacock Ore)

Bornite (Cu5FeS4)

Smoky Quartz (Chlorite Inclusions)

Silicon Dioxide (SiO2) with trace Aluminum and Natural Irradiation

Dyed Agate

Agate (Cryptocrystalline Quartz), SiO2

Smoky Quartz

Silicon Dioxide (SiO2)

Tiger’s eye

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

Bornite (Peacock Ore)

Bornite (Cu5FeS4)

Black Onyx

Chalcedony (SiO2)

Dyed blue quartz or druzy geode (likely)

Quartz, silicon dioxide (SiO₂), probably artificially colored

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

Anyolite (Ruby in green zoisite) or artificially altered chalcedony

Tumbled blue stone, likely blue aventurine or dyed quartzite

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

Artificial Rock Face (Faux Rock)

Glass Fiber Reinforced Concrete (GFRC)

Agate

Agate (a variety of Chalcedony, SiO2)

Blue Dyed Agate Geode Slice

Chalcedony (Silicon Dioxide, SiO2) with artificial cobalt/iron-based dye

Copper-bearing schist (likely bornite/chalcopyrite ore)

Micaceous schist with sulfide minerals, chiefly bornite (Cu₅FeS₄) and/or chalcopyrite (CuFeS₂)

Magnetic Hematite

Magnetized Hematite (an iron oxide mineral, Fe2O3, that has undergone magnetization)

Bismuth

Bismuth (Bi)

Blue Goldstone

Synthetic Avanturine Glass (or Aventurine Glass)

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.

Smoky Quartz

SiO2 (Silicon Dioxide)

Goldstone (blue-goldstone–style glass) beads

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

Peridot (likely, given the color and bead form)

Olivine, variety Peridot (Mg,Fe)2SiO4

Smoky Quartz

Quartz (SiO₂)

Agate (specifically, multi-colored or pastel-dyed agate)

Silicon dioxide (SiO2) - specifically, a cryptocrystalline variety of quartz known as Chalcedony, with banding classified as Agate. (If it were Fluorite, the chemical formula would be Calcium Fluoride - CaF2).

Carved Mottled Greenish-Yellow Crystal/Glass Object

Unknown; possibly a form of quartz (chalcedony/jadeite/nephrite) or glass/resin.

Turquoise cabochon

Turquoise; hydrated copper–aluminum phosphate, approximately CuAl6(PO4)4(OH)8·4H2O (composition varies)

Carnelian

Carnelian (a variety of Chalcedony, SiO2)