Mineraloid (Synthetic)

Black Tourmaline (Schorl)

Schorl (Na(Fe²⁺)₃Al₆(BO₃)₃Si₆O₁₈(OH)₄)

Sapphire

Corundum (Al₂O₃) with trace elements causing color variations.

Apatite

Apatite group mineral (e.g., Fluorapatite - Ca5(PO4)3F, Chlorapatite - Ca5(PO4)3Cl, Hydroxylapatite - Ca5(PO4)3(OH))

Moonstone

Orthoclase Feldspar (KAlSi3O8)

Sodalite

Sodalite (Na4Al3Si3O12Cl)

Rutilated Quartz

Quartz (SiO2) with Rutile inclusions (TiO2)

Note: Item is not a geological specimen

Guitar Components (Steel, Nickel, Plastic, Wood)

Man-made Blank Ammunition (Brass)

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

Titanium-coated Metal Cube (Man-made Fidget Toy)

Titanium-anodized or electroplated alloy (e.g., Ti-coated Zinc or Aluminum)

Prehnite

Prehnite, Ca2Al2Si3O10(OH)2

Aquamarine

Beryl (Be3Al2Si6O18), specifically the blue-green variety

Magnetic Hematite

Magnetized Hematite (an iron oxide mineral, Fe2O3, that has undergone magnetization)

Emerald

Beryl (variety Emerald), Be3Al2Si6O18 with Cr and/or V

Cat's Eye Shell (Shiva Shell)

Operculum of the Turbo petholatus (Tapestry Turban Snail), predominantly Calcium Carbonate (Aragonite)

Tektite (Indochinite)

Tektite (High-silica natural glass)

Tektite (specifically Indochinite)

Tektite (Natural silica glass)

Amber (and Citrine Quartz)

Succinite (Amber) and Silicon Dioxide (SiO2)

Ferruginous Slag (Iron Smelting Byproduct)

Fused Silicate Scoria (Amorphous mixture of FeO, SiO2, and CaO)

Red Jasper

Jasper (a variety of Chalcedony, SiO₂)

Amber

Succinite (Resinite)

Amber

Succinite (specifically for Baltic amber); Approximate formula: C10H16O

Cobalt Blue Sea Glass

Amorphous Silica Glass (SiO2 + CoO)

Baltic Amber (Butterscotch variety)

Succinite

Red Slag Glass

Amorphous Silica (Industrial byproduct with metallic oxide dopants)

Cullet Glass (sometimes mistaken for Blue Obsidian or Slag)

Amorphous Silicon Dioxide (SiO2) with chemical additives (e.g., Cobalt for blue color)

Green Glass Slag

Amorphous Silicon Dioxide (SiO2) with metal oxide impurities

Baltic Amber (Butterscotch or Egg Yolk Variety)

Succinite (C10H16O)

Green Slag Glass

Amorphous Silica / Glassy Blast Furnace Slag

Glass Nugget (Tumbled Glass)

Amorphous Silicon Dioxide (SiO2) with additives

Red Coral

Corallium rubrum (Calcium Carbonate, CaCO3 with Carotenoid pigments)

Chalcedony (or a variety of Chalcedony, likely Agate or Jasper)

Chalcedony (SiO₂)

Green Slag

Anthropogenic Silicate Glass

Slag (Industrial Glass Slag)

Amorphous Silicate Glass (often containing Al, Ca, Mg, and Ti oxides)

Shell Cameo

Cypraecassis rufa (Bullmouth Queen Helmet Shell)

Ferruginous Slag (Iron Smelting Byproduct)

Anthropogenic Vitreous Silicate (often containing Fayalite: Fe2SiO4)

Slag (Industrial Glass/Metal Waste)

Artificial silicate/ferro-silicate byproduct

Amber

Succinicum (Organic compound, primarily C10H16O)

Diamond

Diamond (pure carbon; C)

Shale with Vein Infillings

Shale (a fine-grained clastic sedimentary rock). The veins could be Calcite (CaCO3), Quartz (SiO2), or other minerals.

Asphalt (Bituminous Concrete)

Bituminous Concrete / Pavement

Goldstone (Red)

Aventurine Glass (Cupriferous glass)

Faceted Glass (Costume Jewelry)

Amorphous Silicon Dioxide with colorants (Glass)