Man Made Material (Jewelry, Metal Alloy)

Goldstone (blue/black aventurine glass)

Man-made aventurine glass; silica glass containing metallic copper or other glittering inclusions

Goldstone

Aventurine Glass (Man-made glass with copper inclusions)

Polished blue glassy mineral specimen, likely sodalite or blue aventurine

Most consistent with sodalite (Na₈Al₆Si₆O₂₄Cl₂), though dyed quartzite or blue glass cannot be excluded from the photograph

Diamond-set gold jewelry piece

Diamond, crystalline carbon (C), mounted in gold alloy

Standing Liberty Quarter (Silver Specimen)

Native Silver alloy (Ag with Cu traces)

Native copper nugget

Copper (Cu), commonly with cuprite and copper-oxide alteration

Porcelain (White Ceramic)

Mullite-bearing Vitrified Ceramic (Major phases: Mullite Al6Si2O13, Glassy Silica SiO2)

Goldstone

Man-made glass with copper inclusions

Red cabochon gemstone ring (likely ruby or red spinel; identity unconfirmed)

Possibly corundum (ruby, Al₂O₃) or spinel (MgAl₂O₄); visual identification alone cannot distinguish these from glass or synthetic stones.

Yellow faceted gemstone, likely citrine or yellow sapphire

Uncertain; probable quartz (SiO₂) or corundum (Al₂O₃)

Gemstone jewelry ensemble

Likely mixed gemstone and glass-bead jewelry; exact stones cannot be determined from the image

Asphalt Concrete (Bituminous Concrete)

Bituminous aggregate

Green Sea Glass

Man-made silicate glass (weathered)

Blue chalcedony bead necklace

Chalcedony, microcrystalline quartz (SiO₂), commonly blue-dyed or blue-gray natural chalcedony

Small greenish crystal/mineral fragment

Indeterminate; possibly olivine, quartz, or a green gemstone fragment

White cabochon gemstone, likely milky chalcedony or opalite

Chalcedony: microcrystalline quartz, SiO₂; appearance may also indicate synthetic opalite glass

Iron-Nickel Meteorite Fragment (Unclassified)

Iron-Nickel Alloy (Taenite and Kamacite)

Likely iron meteorite

Iron meteorite, predominantly kamacite and taenite (Fe–Ni alloys)

Asphalt (Bituminous pavement)

Bituminous concrete / Asphalt

Amber jewelry (possibly amber-colored glass or resin)

Amber — fossilized plant resin, chiefly composed of polymerized terpenoids; the pictured material cannot be confirmed from the image

Gold and Silver (Metal Components of an Antique Pocket Watch)

Native Gold (Au) and Native Silver (Ag)

Cubic Zirconia (Jewelry Setting)

Cubic Zirconia (ZrO2)

Green sea glass (likely)

Man-made glass, likely soda-lime silicate glass; not a natural mineral or rock

Cullet Glass (Slag)

Amorphous Silicon Dioxide (Man-made)

Quartz (Engineered Stone Countertop)

Silicon Dioxide (SiO2) with polymer resins

Chert (Yellow Jasper/Flint)

Microcrystalline Quartz (SiO2)

Goldstone beads (likely brown goldstone)

Man-made copper-bearing glass; not a natural mineral. Often sold as “aventurine glass.”

Iron meteorite (probable)

Fe–Ni alloy, mainly kamacite and taenite

Obsidian

Volcanic glass

Red Sandstone or Brick Fragment

Arenite (if sandstone)

Possible metallic meteorite or iron-nickel bead

Unconfirmed; possible Fe–Ni alloy (kamacite/taenite)

Blue glassy gemstone-like specimen

Indeterminate; possibly dyed or treated turquoise, blue apatite, or man-made glass

Blue Obsidian (Cullet Glass)

Man-made silicate glass

Slag Glass

Amorphous Silicate (Man-made)

Cubic Zirconia

Cubic Zirconium Dioxide (ZrO2)

Sea Glass

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

Decorative mosaic cross containing mixed rock and glass fragments

Polychrome aggregate; likely quartz, feldspar, marble, granite, and assorted colored glass

Polished black pebble, possibly obsidian

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

Polished black pebble, likely basalt

Basalt, a fine-grained mafic volcanic rock composed mainly of plagioclase feldspar and pyroxene, commonly with olivine

Faceted clear gemstone, likely quartz or glass imitation

Most likely quartz (SiO₂); exact identification requires refractive-index and hardness tests

Titanium Aura Quartz

Titanium bonded Silicon Dioxide (SiO2 + Ti)

Aquamarine (Small Beads)

Beryl (Be3Al2Si6O18 with traces of iron)