Man Made Object (Ring)

Sea Glass

Man-made silicate glass

Blue-green cabochon, likely chalcedony or treated glass imitation

Cryptocrystalline quartz (chalcedony/possibly chrysoprase); identification uncertain from image

Cubic Zirconia (Simulated Diamond)

Cubic Zirconia (ZrO2)

Sea Glass

Amorphous silicon dioxide (Man-made glass weathered by wave action)

Opalite

Synthetic Opalized Glass

Carved opalite pendant

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

Opalite

Man-made Glass (Synthetic Opalized Glass)

Translucent greenish gemstone, possibly jade or quartz

Not reliably identifiable from the image; candidate materials include jadeite (NaAlSi₂O₆), nephrite (Ca₂(Mg,Fe)₅Si₈O₂₂(OH)₂), or quartz (SiO₂)

Dyed or synthetic turquoise-blue glass-like specimen

Likely man-made colored glass or resin; exact identification requires testing

Opalite

Synthetic glass / Opalized glass

Diamond ring (likely a faceted clear gemstone)

Diamond, crystalline carbon (C); the setting appears to be gold-colored metal

Gem-set gold ring

Likely gold alloy set with a colorless gemstone, possibly diamond or clear quartz; the stone cannot be identified reliably from the image

Opalite

Synthesized glass / Silicon dioxide glass

Opalite

Synthetic glass / Simulated opal

Mystic Topaz

Aluminum Silicate Fluoride Hydroxide (Al2SiO4(F,OH)2) with metallic film coating

Gold ring with a dark, possibly gemstone setting

Gold alloy; the dark setting is not identifiable from the image

Possible weathered basalt or slag fragment

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

Opalite

Synthetic Opalite Glass

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

Likely polished quartz or glass-like mineral cabochon

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

Turquoise ring

Turquoise, CuAl₆(PO₄)₄(OH)₈·4H₂O; the setting appears to be silver-colored metal

Sandstone (with Liesegang rings or joints)

Clastic Sedimentary Rock (primarily Quartz with Iron Oxide cement)

Milky quartz (likely)

Quartz, silicon dioxide (SiO₂)

Tumbled black stone, likely black obsidian

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

Opalite (Synthetic Moonstone/Sea Opal)

Silicon Dioxide (SiO2) glass with metallic inclusions

Dark green cabochon gemstone ring

Unknown; possibly green onyx (cryptocrystalline quartz, SiO₂) or another green gem

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

Diamond-set gold ring

Diamond (carbon, C; cubic crystal structure), set in a gold alloy

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)

Opalite

Synthetic Opalised Glass

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.

Diamond-set gold ring

Diamond (crystalline carbon, C) set in a gold alloy; the metal and setting are manufactured

Diamond (in a gold ring)

Diamond (pure carbon, C)

Diamond (or Cubic Zirconia)

Carbon (C) or Zirconium Dioxide (ZrO2)