Man Made Object (Metal Alloy)

Crackled Quartz (Dyed)

Silicon Dioxide (SiO2)

Metallic meteorite fragment (probable stony-iron or iron meteorite)

Undetermined meteoritic Fe–Ni alloy with silicate minerals

Lepidolite Polished Point

Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)

Engineerged Quartz (Quartz Composite)

SiO2 (Silicon Dioxide) in a polymer resin matrix

Porcelain (White Ceramic)

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

Acrylic or Resin (Synthetic Imitation)

Polymethyl Methacrylate (PMMA) or Polyepoxide

Sea Glass

Man-made vitreous material (silica-based glass)

Green Glass Slag

Amorphous Silicon Dioxide (SiO2) with metal oxide impurities

Diamond ring

Diamond (crystalline carbon, C)

Carved nephrite jade thumb ring/seal

Nephrite jade: fibrous amphibole aggregate, chiefly tremolite–actinolite, Ca₂(Mg,Fe)₅Si₈O₂₂(OH)₂

Dyed Imperial Jasper (Sea Sediment Jasper)

Silicon Dioxide (SiO2) - Impure Quartz/Chalcedony

Mixed stone-bead bracelet, likely agate/jasper and possibly sodalite or dyed quartz

Primarily microcrystalline quartz (SiO₂) varieties, with opaque iron-rich chalcedony/jasper and probable blue sodalite or dyed material

Concrete Fragment

Hardened Portland Cement Composite

Green Aventurine

SiO2 (Silicon Dioxide with Fuchsite inclusions)

Sandstone-based Concrete Fragment

Cementitious Composite with Sedimentary Aggregate

Silicon Carbide (Carborundum)

Silicon Carbide (SiC) / Moissanite (natural)

Asphalt (Bituminous pavement)

Bituminous concrete / Asphalt

Titanium-Coated Hematite (Aura Hematite)

Titanium-bonded Hematite (Fe2O3 with a Ti coating)

Ocean Jasper Mushroom

Orbicular Jasper (Silicon Dioxide, SiO2 mixed with various impurities)

Opalite

Man-made Glass (Synthetic Opalized Glass)

Goldstone

Avventurina (Man-made Glass with Copper inclusions)

Opalite

Man-made glass (traditionally simulated Opal)

Likely weathered granite or granitic gneiss fragment

Granite; primarily quartz, feldspar, and mica

Native copper (probable copper-rich mineral specimen)

Copper, Cu; possibly mixed with cuprite, malachite, and iron-oxide alteration minerals

Opalite glass sphere (likely synthetic imitation)

Man-made opalescent glass; not natural opal

Green Sea Glass

Man-made vitreous material (silica glass)

South Korean 100 Won Coin (Cupronickel)

Cupronickel Alloy (75% Cu, 25% Ni)

Copper

Native Copper (Cu)

Gold bullion bars

Native gold (Au), likely cast or refined metal

Native copper nugget

Copper (Cu), often with cuprite or copper-oxide surface

Polished pyrite nodule (likely)

Pyrite, FeS₂

Blue Goldstone

Man-made glass with crystalline copper/cobalt inclusions

Likely iron meteorite or meteorite fragment

Unclassified meteoritic iron–nickel alloy, possibly an iron meteorite

Asphalt (Bituminous Concrete)

Bituminous mix containing aggregates and petroleum-based binder (CnH2n+2)

Cubic Zirconia

Cubic Zirconium Dioxide (ZrO2)

Aura Quartz (Titanium-coated Quartz)

Silicon Dioxide (SiO2) with metallic vapor coating

Sandstone Concretion

Clastic Sedimentary Concretion (SiO2 with Iron Oxide)

Titanium Aura Quartz

Titanium-coated Silicon Dioxide (SiO2)

Crackle Agate / Dyed Quartz

SiO2 (Silicon Dioxide)

Faceted glass-like gemstone object

Likely synthetic glass or cubic zirconia; exact material cannot be confirmed from the image

Diamond

Carbon (C)

White chalcedony cabochon ring

Chalcedony (microcrystalline quartz, SiO₂), likely white quartz variety