Man Made Object (Metalwork)

Inlaid turquoise and red-stone earrings

Likely turquoise (CuAl₆(PO₄)₄(OH)₈·4H₂O) with an unidentified red inlay; the image does not establish the materials

Man-made Jewelry Charm (Enameled Metal)

Not a natural mineral; composed of base metal alloy (likely zinc or brass) and epoxy resin/enamel.

Possible weathered basalt or slag fragment

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

Likely polished quartz or glass-like mineral cabochon

Probably quartz (SiO₂), though the image cannot exclude man-made glass

Black Onyx (in jewelry setting)

Silicon Dioxide (SiO2)

Milky quartz (likely)

Quartz, silicon dioxide (SiO₂)

Tumbled black stone, likely black obsidian

Obsidian (volcanic glass; chiefly silica-rich rhyolitic composition)

Opalite (likely man-made glass)

Opalite is a trade name for opalescent glass, not a natural mineral; composition is typically silica glass with additives

Green glass cabochon or tumbled stone

Indeterminate; likely man-made glass, possibly aventurine glass rather than a natural mineral

Blue goldstone (man-made glass)

Copper-bearing aventurine glass; synthetic silicate glass

Green aventurine bead bracelet

Quartz (SiO₂), typically green quartzite/aventurine colored by fuchsite mica or other inclusions

Sea Glass

Amorphous Silicon Dioxide (SiO2)

Cullet Glass / Slag Glass

Amorphous silica glass

One Pound Coin (UK)

Nickel-Brass Alloy (Cu-Zn-Ni)

Sea Glass

Man-made silicate glass weathering product

Aluminum Slag

Anthropogenic Aluminum (Al)

Malaysian 50 Sen Coin

Coinage (specific alloy unknown without metallurgical analysis, but typically brass or bronze for this denomination and era)

Blue opalite glass (likely man-made)

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

Carved Mottled Greenish-Yellow Crystal/Glass Object

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

Man-made Metal Pin (Non-geological)

Antimony-Lead Alloy or Zinc/Brass Base with Electroplating

Carnelian beads

Carnelian, an orange-red variety of chalcedony (microcrystalline SiO₂)

Opalite

Synthetic glass / Opaque silicious glass

Tumbled milky quartz

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

Red goldstone beads

Goldstone (man-made copper-bearing glass; not a natural mineral)

Opalite

Synthetic glass / Opalized glass

Diamond (or Simulant)

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

Note: Item is a Synthetic/Man-made Object

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

Obsidian

Volcanic Glass

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)

Opalite (likely imitation opal glass)

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

Opalite (likely man-made opalescent glass)

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

Opalite

Synthetic glass (SiO2 + impurities)

Crescent Pebble

Weathered Quartzite or Sandstone Fragment

Dalmatian jasper

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

Diamond

Native Carbon (C)

Polished black stone, likely black obsidian

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

Pink quartz cabochon (likely rose quartz)

Quartz, SiO₂; pink coloration likely from trace elements or microscopic inclusions

Sea Glass

Man-made silicate glass

Sea Glass

Man-made silicate glass

Sea Glass

Man-made silicate glass

Sea Glass

Man-made silicate glass