Man Made Object (Metal Alloy)

Carved Mottled Greenish-Yellow Crystal/Glass Object

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

Slag Glass (Cullet)

Amorphous Silica (man-made), primarily SiO2 with trace metal oxides

Man-made Glass (Tumbled/Shaped)

Amorphous Silicon Dioxide (SiO2) with metal oxide colorants

Gemstone-set ring, likely cubic zirconia or diamond

Likely synthetic cubic zirconia (zirconium dioxide, ZrO₂); stones may alternatively be diamond (carbon, C)

Smelter Slag

Anthropogenic Silicate Slag

Green Sea Glass

Amorphous Silica (man-made glass), SiO2 + additive metal oxides

Man-made Dyed Aura Quartz

Silicon Dioxide (SiO2) with metallic coating/dye

Nickel coin (U.S. currency)

Cupronickel (75% Copper, 25% Nickel alloy)

Likely polished dark gemstone cabochon

Indeterminate; possibly black chalcedony/agate, obsidian, or glass imitation

Blue Goldstone

Synthetic Avanturine Glass (or Aventurine Glass)

Crescent Pebble

Weathered Quartzite or Sandstone Fragment

Diamond (or Simulant)

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

Silver (Sterling Silver)

Argentum (Ag) mixed with Copper (Cu); Formula: Ag+Cu

Dalmatian jasper

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

Standing Liberty Quarter (Silver Specimen)

Native Silver alloy (Ag with Cu traces)

Blue slag glass / industrial smelter slag

Man-made iron-rich silicate slag; composition variable, commonly Fe–Ca–Mg–Al silicates with glassy phases

ABS Plastic (Acrylonitrile Butadiene Styrene)

(C8H8)x·(C4H6)y·(C3H3N)z

Polished black stone, likely black obsidian

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

Tumbled white chalcedony (likely milky quartz)

Chalcedony, microcrystalline quartz (SiO₂)

Polished dendritic agate cabochon (likely agate or jasper)

Microcrystalline quartz, SiO₂, commonly chalcedony with iron-oxide inclusions

Opalite (likely man-made opalescent glass)

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

Tumbled clear quartz (rock crystal)

Quartz, silicon dioxide (SiO₂)

Opalite (a synthetic glass)

Silicon Dioxide (SiO2) with various additives; not a true mineral but a man-made gem simulant

Opalite

Synthetic glass (SiO2 + impurities)

Carnelian cabochon

Orange-red variety of chalcedony (microcrystalline quartz), SiO₂

Diamond

Native Carbon (C)

Rose Quartz and Cherry Quartz (Dyed Glass/Quartz)

Silicon Dioxide (SiO2) with inclusions/dye

Rose Gold (Copper-Gold Alloy)

Aurum-Cuprum Alloy (Au-Cu)

Copper Ore

Mixed copper sulfides/oxides in gangue matrix

Tumbled clear quartz (rock crystal)

Quartz, silicon dioxide (SiO₂)

Beads (likely glass or man-made material)

N/A (artificial material)

Polished brown jasper (likely brecciated or orbicular jasper)

Microcrystalline quartz/chalcedony, SiO₂, with iron-oxide and other mineral inclusions

Opalite (a synthetic glass, often confused with Opal)

Silicon dioxide glass (SiO2nH2O, for natural opal)

Red faceted gemstone ring

Likely synthetic ruby or red spinel; exact identification requires testing

Blue chalcedony bead necklace

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

Synthetic Zinc/Polycarbonate Composite (Bey-specimen)

Zinc Alloy (Zamak 3) with Polycarbonate (C15H16O2)n Overlay

Polished white chalcedony or quartz pendant

Microcrystalline quartz (chalcedony), SiO₂; exact identification is uncertain from the image

Opalite

Man-made opalescent glass

Goldstone

Aventurine Glass (Man-made)

Sea Glass

Man-made silicate glass

Slag Glass

Amorphous Silicate (Man-made)

Goldstone (brown goldstone)

Man-made aventurine glass, typically copper-bearing silica glass