Man Made (Synthetic Rock)

Green glassy mineral fragment, possibly fluorite

Fluorite (calcium fluoride, CaF₂), tentative identification

Diamond

Carbon (C)

Gemstone ring (stone not identifiable)

Unknown; the small central stone may be a colorless gemstone or glass, and the surrounding metal is gold-colored alloy

Rainbow Hematite (Man-made/Treated)

Tumbled Hematite with Titanium/Anodized coating (Iron(III) oxide, Fe2O3)

Glass / Silicon Dioxide (Man-made)

SiO2 (Amorphous Silicon Dioxide)

Blue sea glass or blue glassy mineral fragment

Uncertain; likely man-made soda-lime glass, not a natural mineral

Blue glassy fragment among beach gravel

Likely cobalt-blue man-made glass; not a natural mineral specimen

Aventurine

Quartz containing inclusions of Fuchsite (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)

Ferro-silicate Slag

Industrial Vitrified Slag (High-silica amorphous glass)

Metal Chain (Likely Steel or a Steel Alloy)

Steel (primarily iron and carbon); specific alloy unknown

Tumbled black stone, likely black obsidian

Obsidian; volcanic glass, typically rhyolitic composition (SiO₂-rich)

Clear Quartz crystals on a Matrix base (Geode fragment)

Silicon Dioxide (SiO2)

Man-made Dyed Aura Quartz

Silicon Dioxide (SiO2) with metallic coating/dye

Red faceted gemstone, likely synthetic ruby or red glass imitation

Possibly synthetic corundum (Al₂O₃:Cr³⁺); image alone cannot distinguish it from glass or another imitation

Small stud earring with a purple gemstone (possibly amethyst)

Possible amethyst, a purple variety of quartz (SiO₂); identification is uncertain from the image

Tumbled black obsidian (likely)

Volcanic glass; chiefly silica-rich rhyolitic glass (SiO₂)

Small water-worn pebble, likely granite or granitic rock

Granite (tentative; exact identification is uncertain from the photo)

Slag Glass (Leland Blue variant)

Anthropogenic Vitreous Silicate

Asphalt Pavement (with aggregate)

Asphalt concrete

Libyan Desert Glass

Impact-melt silica glass (SiO2 + traces of Al, Fe, Ti)

Coal (Bituminous or Anthracite)

Carbonaceous Sedimentary Rock

Faceted purple gemstone, possibly amethyst

Likely quartz (SiO₂), variety amethyst; identification is uncertain from the image

Fired Clay Brick (Anthropic Rock substitute)

Anthropogenic polycrystalline ceramic (predominantly Mullite and Quartz: Al6Si2O13 + SiO2)

Digital Multimeter (Synthetic Object)

Digital Multimeter (DMM)

Turquoise cabochon pendant

Turquoise, hydrated copper aluminum phosphate — CuAl₆(PO₄)₄(OH)₈·4H₂O

Dyed Agate

Silicon Dioxide (SiO2) with synthetic dyes

Pink Dyed Agate

Silicon Dioxide (SiO2) with synthetic pigment

Possible weathered basalt or slag fragment

Basalt, chiefly plagioclase and pyroxene; identification is uncertain from the image

Painted River Rock

Polished fluvial clast with acrylic/synthetic pigment coating

Dyed Dragon Vein Agate

Silicon Dioxide (SiO2) with artificial pigment

Amethyst (likely synthetic or treated)

Purple quartz, SiO₂; color caused mainly by trace iron and irradiation

Blue Impression Jasper beads

Impression jasper (microcrystalline quartz/chalcedony), chiefly SiO₂, with iron-oxide and other mineral inclusions

Clear faceted gemstone, likely synthetic cubic zirconia

Cubic zirconia (zirconium dioxide, ZrO₂); visual identification is not definitive and diamond or synthetic moissanite are alternatives

Belemnite Fossil

Belemnitida (rostrum)

Pink Dyed Agate

Silicon Dioxide (SiO2) - Variety Agate

Terracotta (Man-made ceramic brick fragment)

Baked clay / High-iron ceramic (Silicate-based ceramic)

Sandstone

Arenite (SiO2, often with CaCO3 or Fe2O3 cement)

Dalmatian Stone

Dalmatian Jasper (a misnomer) / Perthitic Feldspar Rock

Carved Mottled Greenish-Yellow Crystal/Glass Object

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

Pink faceted gemstone, likely synthetic ruby or pink sapphire

Corundum (Al₂O₃), possibly chromium-colored ruby; synthetic origin likely

Small rounded pebble (rock type indeterminate)

Unidentified fine-grained lithic pebble

Blue goldstone

Man-made aventurine glass containing metallic copper particles; not a natural mineral