Sedimentary (Man Made Composite)

Opalite (a synthetic glass, often confused with Opal)

Silicon dioxide glass (SiO2nH2O, for natural opal)

Fired Clay Brick (Anthropic Rock substitute)

Anthropogenic polycrystalline ceramic (predominantly Mullite and Quartz: Al6Si2O13 + SiO2)

Sea Glass

Amorphous Silicon Dioxide (Man-made glass weathered by nature)

Carved Mottled Greenish-Yellow Crystal/Glass Object

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

Goldstone (with Tiger's Eye and Quartz)

Aventurine glass (Synthetic SiO2 with Cu inclusions)

Sea Glass

Amorphous silicon dioxide (Man-made glass weathered by nature)

Metal Chain (Likely Steel or a Steel Alloy)

Steel (primarily iron and carbon); specific alloy unknown

Opal (in Jewelry Setting)

Hydrated Silicon Dioxide (SiO2·nH2O)

Digital Multimeter (Synthetic Object)

Digital Multimeter (DMM)

Buffalo Nickel (Indian Head Nickel)

Cupronickel (75% Copper, 25% Nickel)

Polymictic breccia, possibly volcanic breccia

Polymictic clastic breccia; likely a matrix-supported breccia containing lithic fragments, quartz, feldspar, and dark mafic minerals

Pearl (likely Freshwater or Akoya Cultured)

Aragonite / Conchiolin composite (CaCO3)

Chalk

Micrite (primarily Calcium Carbonate, CaCO3)

Wood Paneling

Engineered Wood / Plywood Paneling

Terracotta (Man-made ceramic brick fragment)

Baked clay / High-iron ceramic (Silicate-based ceramic)

Polished blue calcite sphere (tentative identification)

Calcite, CaCO₃; blue color generally results from trace impurities or inclusions

Man-made Carved Stone (Scream Mask/Skull motif)

Carved Soapstone or Serpentine-rich rock

Copper Composite Turquoise (Purple and Blue)

Composite Hydrous copper aluminum phosphate with bronze/copper matrix binding

Oak-grain Laminate (Industrial/Decorative Furniture Finish)

Melamine Resin-impregnated Decorative Paper on Particleboard (Cellulose/Thermosetting Plastic)

Green Sea Glass

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

Ruby in Fuchsite (Composite/Stabilized)

Corundum (Al2O3) in Chromium-rich Muscovite (K(Al,Cr)2(AlSi3O10)(OH)2)

Goldstone (aventurine glass)

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

Unakite

Altered Granite (Epidotized Granite)

Unakite

Altered Granite (Epidotized Granite)

Tiger Iron

Composite rock (Quartz, Tiger's Eye, Hematite, and Jasper)

Asphalt (Bituminous Concrete)

Asphaltum / Bitumen-Aggregate Matrix

Man-made Glass (Tumbled/Shaped)

Amorphous Silicon Dioxide (SiO2) with metal oxide colorants

Man-made Slag (Industrial Byproduct)

Anthropogenic Glassy Residue

Man-made Crystal (Lead Glass)

Lead oxide-doped Silica Glass (approx. SiO2 + PbO)

Man-made Dyed Aura Quartz

Silicon Dioxide (SiO2) with metallic coating/dye

Pink Zebra Jasper

Microcrystalline Quartz (SiO2)

Connemara Marble

Calcitic Marble / Serpentinite composite

Ruby in Zoisite

Anyolite (composite of Corundum and Zoisite)

Black Pearl (Tahitian Type)

Aragonite / Conchiolin composite (CaCO3)

Opalite

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

Slag Glass (Cullet)

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

Cardstock (Paper)

Cellulose (C6H10O5)n

Goldstone (Red/Brown)

Aventurine Glass (SiO2 with Copper inclusions)

Conglomerate

Conglomerate (Clastic Sedimentary Rock)

Man-made Ceramic / Clay Figurine

Aluminosilicate Ceramic (Processed Clay)

Glass / Silicon Dioxide (Man-made)

SiO2 (Amorphous Silicon Dioxide)

Man-made Blank Ammunition (Brass)

CuZn (Cartridge Brass - roughly 70% Copper, 30% Zinc)