Man Made Glass (Not A Natural Rock Or Mineral)

Dalmatian Stone

Dalmatian Jasper (a misnomer for an Aplite with Arfvedsonite spots)

Metal Chain Belt with Square Plates

Not applicable (man-made)

Metal Alloy (Likely Pewter or Sterling Silver)

Not a natural geological specimen; composed of refined metals. If pewter, it's a tin-based alloy. If sterling silver, it's 92.5% silver and 7.5% other metals (usually copper).

Synthetic Resin / Plastic Figurine

Synthetic Polymer (Copolymer of Polyethylene or Resin)

Slag Glass

Amorphous Silicate (Man-made)

Blue Goldstone

Man-made glass with crystalline copper/cobalt inclusions

Goldstone

N/A (Synthetic Glass with Copper Inclusions)

Blue Slag Glass

Anthropogenic Amorphous Silicon Dioxide

Tektite

Natural impact glass

Blue glassy mineral specimen, possibly dyed or synthetic

Uncertain; possible blue fluorite (CaF₂), dyed chalcedony, or man-made glass

N/A - Man-made object (Jewelry Chain)

Antiqued or Oxidized Metal Chain (often Steel or Brass)

Zinc Alloy (Silver-plated)

Zinc Alloy Casting (Zn-Al-Mg-Cu)

Aura Quartz

Titanium/Titanium-Gold treated Silicon Dioxide (SiO2)

Blue Impression Jasper beads

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

Clear quartz fragment

Quartz (silicon dioxide, SiO₂)

Pink Tumbled Quartz (Dyed)

Silicon Dioxide (SiO2)

Dyed Blue Agate (Dragon Vein Agate)

Silicon Dioxide (SiO2) with artificial cobalt/organic dyes

Rainbow Hematite (Man-made/Treated)

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

Likely tumbled red mineral or glass imitation

Indeterminate; possibilities include red jasper (microcrystalline quartz, SiO₂) or dyed chalcedony

Sandstone (Water-worn Cobble)

Arenite (SiO2 with CaCO3 or Fe2O3 cement)

Carborundum (Silicon Carbide)

Silicon Carbide (SiC)

Sea Glass

Man-made vitreous material (silica-based glass)

Tumbled milky quartz

Quartz, silicon dioxide (SiO₂)

Dyed Dragon Vein Agate

Silicon Dioxide (SiO2) with artificial pigment

Slag

Anthropogenic Vitreous Silica/Iron oxides

Sandstone Concretion

Sedimentary Clastic Rock (Silicate-rich)

Aventurine

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

Sandstone Concretion

Clastic Sedimentary Concretion (SiO2 with Iron Oxide)

Opalite

Man-made synthetic glass with opalescent effects (SiO2 + metal oxides)

Carved Mottled Greenish-Yellow Crystal/Glass Object

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

Blue chalcedony (likely dyed or treated)

Microcrystalline quartz, SiO₂ (chalcedony)

Small clear crystal, possibly quartz or glass-like gemstone

Uncertain; likely quartz (SiO₂), but the image is insufficient to exclude man-made glass or cubic zirconia

Concretion

Sedimentary Concretion (Ironstone / Calcite Concretion)

Tumbled milky quartz (likely)

Quartz, silicon dioxide (SiO₂)

Dyed Aura Quartz

Silicon Dioxide (SiO2) with metallic coating

Green Aventurine

SiO2 (Silicon Dioxide with Fuchsite inclusions)

Asphalt Concrete (Bituminous Pavement)

Aggregates in Bitumen Matrix

Metallic Ornament / Jewelry

N/A - This is an artificial object, not a geological specimen.

Concrete Rubble with Aggregate

Hardened Portland Cement Paste with Coarse Aggregate

Clear quartz crystal

Quartz (silicon dioxide, SiO₂)

Likely tumbled or cut quartz/chalcedony fragment

Silicon dioxide (SiO₂), probably microcrystalline quartz or quartz

Man-made Carved Stone (Scream Mask/Skull motif)

Carved Soapstone or Serpentine-rich rock