Mineral (Man Made Glass, Not Natural)

Goldstone (with Tiger's Eye and Quartz)

Aventurine glass (Synthetic SiO2 with Cu inclusions)

Aura Quartz

Titanium/Titanium-Gold treated Silicon Dioxide (SiO2)

Blue Impression Jasper beads

Impression jasper (microcrystalline quartz/chalcedony), chiefly SiO₂, with iron-oxide and other mineral inclusions

Concrete with Exposed Aggregate

Anthropogenic conglomerate (Concrete)

Clear quartz fragment

Quartz (silicon dioxide, SiO₂)

Pink Tumbled Quartz (Dyed)

Silicon Dioxide (SiO2)

Dyed Blue Agate (Dragon Vein Agate)

Silicon Dioxide (SiO2) with artificial cobalt/organic dyes

Rainbow Hematite (Man-made/Treated)

Tumbled Hematite with Titanium/Anodized coating (Iron(III) oxide, Fe2O3)

Likely tumbled red mineral or glass imitation

Indeterminate; possibilities include red jasper (microcrystalline quartz, SiO₂) or dyed chalcedony

Milky quartz (likely rough quartz crystal)

Quartz, silicon dioxide (SiO₂)

Sea Glass

Man-made vitreous material (silica-based glass)

Tumbled milky quartz

Quartz, silicon dioxide (SiO₂)

Dyed Dragon Vein Agate

Silicon Dioxide (SiO2) with artificial pigment

Smelter Slag

Anthropogenic Silicate Slag

Sandstone Anvil / Nutting Stone

Quartzose Sandstone (Sedimentary Rock)

Aventurine

Quartz containing inclusions of Fuchsite (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)

Opalite

Man-made synthetic glass with opalescent effects (SiO2 + metal oxides)

Carved Mottled Greenish-Yellow Crystal/Glass Object

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

Blue chalcedony (likely dyed or treated)

Microcrystalline quartz, SiO₂ (chalcedony)

Small clear crystal, possibly quartz or glass-like gemstone

Uncertain; likely quartz (SiO₂), but the image is insufficient to exclude man-made glass or cubic zirconia

Tumbled milky quartz (likely)

Quartz, silicon dioxide (SiO₂)

Dyed Aura Quartz

Silicon Dioxide (SiO2) with metallic coating

Green Aventurine

SiO2 (Silicon Dioxide with Fuchsite inclusions)

Clear quartz crystal

Quartz (silicon dioxide, SiO₂)

Likely tumbled or cut quartz/chalcedony fragment

Silicon dioxide (SiO₂), probably microcrystalline quartz or quartz

Hematite

Iron(III) oxide (Fe2O3)

Diamond

Carbon (C)

Glass

Amorphous Silicon Dioxide (SiO2)

Blue Glass or Slag Glass

Amorphous Silica (Anthropogenic Glass)

Carborundum (Silicon Carbide)

Silicon Carbide (SiC) / Moissanite (natural form)

Milky quartz (rough quartz fragment)

Quartz, silicon dioxide (SiO₂)

Clear quartz crystal (likely)

Quartz, silicon dioxide (SiO₂)

Man-made Jewelry Charm (Enameled Metal)

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

Small rounded mineral pebble, possibly quartz

Uncertain; likely microcrystalline or crystalline SiO₂ (quartz), potentially with iron-oxide staining

Dyed Quartz Geode

Silicon Dioxide (SiO2) with artificial pigment

Diamond

Native Carbon (C)

Cultured Marble (Synthetic)

Polymer-matrix composite (typically calcium carbonate in polyester resin)

Hematite

Iron(III) oxide (Fe2O3)

Cullet Glass (Slag Glass)

Amorphous Silicon Dioxide (Industrial Man-made)

Chert Concretion (with typical hematite/limonite staining)

Sedimentary Concretion (SiO2 with FeO(OH)⋅nH2O)

Granite with Cupules / Bedrock Mortars

Granite (felsic intrusive plutonic rock)

Polymictic conglomerate or breccia (possibly concrete-like aggregate)

Lithified polymictic gravel; clasts may include basalt, granite, quartzite, and other silicates