Man Made Object (Coin)

Carved Mottled Greenish-Yellow Crystal/Glass Object

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

Tumbled milky quartz

Quartz — silicon dioxide (SiO₂), cryptocrystalline or microcrystalline variety possible

Man-made Metal Pin (Non-geological)

Antimony-Lead Alloy or Zinc/Brass Base with Electroplating

Blue opalite glass (likely man-made)

Opalite glass; a silica-based amorphous glass, not natural opal

Note: Item is a Synthetic/Man-made Object

Titanium-coated Stainless Steel (Fe-Cr-Ni-Ti)

Opalite

Synthetic glass / Opalized glass

Diamond (or Simulant)

Carbon (C) or relevant simulant formula (e.g., ZrO2 for Cubic Zirconia)

Soapstone Carving

Steatite

Crescent Pebble

Weathered Quartzite or Sandstone Fragment

Polished black stone carving, likely soapstone/steatite

Steatite (massive talc), Mg₃Si₄O₁₀(OH)₂; exact material cannot be confirmed from the image

Opalite (likely imitation opal glass)

Man-made opalescent glass; not a natural mineral (often sold as opalite)

Dalmatian jasper

Porphyritic microcrystalline quartz-rich rock, commonly sold as Dalmatian jasper; spots are chiefly arfvedsonite/amphibole minerals, sometimes altered feldspar

ABS Plastic (Acrylonitrile Butadiene Styrene)

(C8H8)x·(C4H6)y·(C3H3N)z

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

Antiqued or Oxidized Metal Chain (often Steel or Brass)

Polished black stone, likely black obsidian

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

Opalite

Synthetic glass (SiO2 + impurities)

Tumbled white chalcedony (likely milky quartz)

Chalcedony, microcrystalline quartz (SiO₂)

Opalite (likely man-made opalescent glass)

Opalite; not a true mineral, typically synthetic opalescent glass (silica-based)

Diamond

Native Carbon (C)

Tumbled clear quartz (rock crystal)

Quartz, silicon dioxide (SiO₂)

Opalite (a synthetic glass)

Silicon Dioxide (SiO2) with various additives; not a true mineral but a man-made gem simulant

Rose Quartz and Cherry Quartz (Dyed Glass/Quartz)

Silicon Dioxide (SiO2) with inclusions/dye

Unidentified gray metallic object

Not determinable from the image; likely a metal screw or manufactured fastener rather than geological material

Opalite

Synthetic glass / Opaque silicious glass

Beads (likely glass or man-made material)

N/A (artificial material)

Opalite

Man-made opalescent glass

Opalite

Man-made opalized glass

Goldstone

Aventurine Glass (Man-made)

Sea Glass

Man-made silicate glass

Slag Glass

Amorphous Silicate (Man-made)

Opalite crescent pendant

Opalite (man-made opalescent glass; not a natural mineral)

Orgonite Pyramid (containing Amethyst and mixed minerals)

Silicon Dioxide (SiO2) in synthetic resin

Tumbled clear quartz (rock crystal)

Quartz, silicon dioxide (SiO₂)

Polished brown jasper (likely brecciated or orbicular jasper)

Microcrystalline quartz/chalcedony, SiO₂, with iron-oxide and other mineral inclusions

Nickel coin (U.S. currency)

Cupronickel (75% Copper, 25% Nickel alloy)

Goldstone (brown goldstone)

Man-made aventurine glass, typically copper-bearing silica glass

Small pebble, likely limestone

Unidentified carbonate pebble, possibly micritic limestone (calcite, CaCO₃)

Polished white chalcedony or quartz pendant

Microcrystalline quartz (chalcedony), SiO₂; exact identification is uncertain from the image

Concrete Fragment

Artificial Conglomerate (Cement and Aggregate)

Possible obsidian or slag glass

Volcanic glass, primarily SiO₂; alternatively industrial iron-rich glassy slag

Polished black pebble, possibly obsidian

Volcanic glass (obsidian), likely; identification is tentative from the image

Diamond (or Simulant)

Carbon (C)