Anthropogenic (Man Made Industrial Deposit)

Sea Glass (Cobalt Blue)

Amorphous Silica (Glass with Cobalt additives)

Diamond (in Jewelry Setting)

Carbon (C)

Diamond

Native Carbon (C)

Dyed Crackle Quartz

Silicon Dioxide (SiO2) with synthetic dye

Goldstone (aventurine glass)

Man-made copper-bearing glass; not a natural mineral (commonly sold as blue/brown goldstone)

Painted River Pebble (likely Basalt or Greywacke)

Aphanitic Lithic Clast with Anthropogenic Pigment coating

Dyed Dragon Vein Agate

Silicon Dioxide (SiO2) with artificial pigment

Diamond

Carbon (C)

Rough Corundum (Sapphire/Ruby mixture)

Corundum (Aluminum Oxide, Al2O3)

Native Silver

Silver (elemental Ag)

Diamond

Diamond (pure Carbon, C)

Diamond

Carbon (C)

Goldstone (with Tiger's Eye and Quartz)

Aventurine glass (Synthetic SiO2 with Cu inclusions)

Sandstone

Clastic sedimentary rock (primarily SiO2)

Diamond in Kimberlite

Diamond (C in Kimberlite)

Rough Diamond

Pure Carbon (C)

Diamond

Diamond (pure Carbon, C)

Chert (Yellow Jasper)

Cryptocrystalline Quartz (SiO2)

Carved Mottled Greenish-Yellow Crystal/Glass Object

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

Polished amethyst-bearing quartz

Quartz, SiO₂; purple coloration from irradiation and trace iron

Dark, weathered stone—possibly basalt or slag

Indeterminate; likely fine-grained basalt (plagioclase–pyroxene)

Diamond

Carbon (C)

Tumbled ruby-in-zoisite (likely)

Ruby-bearing zoisite; zoisite Ca₂Al₃(SiO₄)₃(OH), corundum ruby Al₂O₃

Man-made Synthetic Material (Not a rock or mineral)

Polyester (Polyethylene terephthalate) / Faux Fur

Man-made Synthetic Material (Costume Faux Fur)

Synthetic Polymer (Polyester/Acrylic)

Blue-green chrysocolla rough specimen

Chrysocolla, hydrated copper aluminosilicate; commonly associated with malachite, quartz, and limonite

Diamond

Carbon (C)

Diamond

Carbon (C)

Blue glass-like bead or gemstone keychain ornament

Indeterminate; likely cobalt-blue glass or synthetic blue spinel, not identifiable as a natural mineral from the image

Chert (Jasper/Common Chert Pebble)

Microcrystalline Quartz (SiO2)

Likely weathered iron-rich rock or slag fragment

Uncertain; possibly limonite/goethite-rich material (FeO(OH)·nH₂O)

Blue faceted gemstone, likely synthetic sapphire or blue glass

Corundum (Al₂O₃) if sapphire; identity cannot be confirmed visually

Diamond

Native Carbon (C)

Goldstone (likely red/brown aventurine glass)

Man-made aventurine glass; copper-bearing silicate glass (not a natural mineral)

Dyed or synthetic turquoise-blue glass-like specimen

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

Blue goldstone

Man-made aventurine glass containing metallic copper particles; not a natural mineral

Tumbled yellow jasper or chalcedony

Microcrystalline quartz, SiO₂; likely iron-oxide-bearing jasper/chalcedony

Dyed Quartz Geode

Silicon Dioxide (SiO2) with artificial pigment

Likely iron-rich rock or weathered metallic mineral fragment

Uncertain; possibly limonite/goethite or iron-bearing slag

Polished orange agate beads

Chalcedony, microcrystalline quartz (SiO₂), commonly sold as agate

Pink calcite (likely)

Calcite — calcium carbonate, CaCO₃

Chert (Arrowhead/Tool variety)

Microcrystalline Quartz (SiO2)