Man Made Alloy (Metallic)

Rock crystal (clear quartz), possibly cloudy quartz

Quartz, silicon dioxide (SiO₂)

Native Copper

Copper (Cu)

Likely raw chalcopyrite or bornite specimen

Chalcopyrite (CuFeS₂), possibly bornite (Cu₅FeS₄)

Ferro-slag (Leland Blue/Slag Glass)

Anthropogenic Vitreous Silica (Industrial Slag)

Polished iron-rich meteorite (probable Sikhote-Alin-type iron meteorite)

Fe–Ni kamacite/taenite alloy, with possible troilite inclusions

Copper-bearing rock, likely native copper in matrix

Native copper (Cu), possibly with cuprite/iron-rich matrix

Iron Meteorite

Meteoritic Iron (Fe-Ni alloy)

Moissanite

Silicon Carbide (SiC)

Blue Crackle Quartz (Dyed Quarzite)

Silicon Dioxide (SiO2) with artificial dye

Dyed Blue Agate (Dragon Vein Agate)

Silicon Dioxide (SiO2) with artificial cobalt/organic dyes

Diamond

Native Carbon (C)

Iron Meteorite / Limonite-coated Meteorite / Iron Nodule

Iron-Nickel Alloy (Kamacite and Taenite) with weathering crust

Cullet Glass (sometimes mistaken for Blue Obsidian or Slag)

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

Granite with Cupules / Bedrock Mortars

Granite (felsic intrusive plutonic rock)

Iron Meteorite

Siderite (meteoritic iron, Fe-Ni alloy)

Red-orange jasper pebble (tentative)

Microcrystalline quartz, SiO₂, colored mainly by iron oxides

Copper Ore

Native Copper (Cu) often found with Chalcocite (Cu2S) or Bornite (Cu5FeS4)

Iron meteorite fragment

Fe-Ni meteorite, likely an iron meteorite or stony-iron fragment

Copper-Bearing Sulfide Ore (likely Chalcopyrite or Bornite)

Chalcopyrite (CuFeS2) or Bornite (Cu5FeS4) in host rock

Polymictic conglomerate or breccia (possibly concrete-like aggregate)

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

Opalite

Synthetic glass (SiO2 + metal additions)

Blue chalcedony (likely dyed or treated)

Microcrystalline quartz, SiO₂ (chalcedony)

Blue Obsidian (Cullet Glass)

Silicon Dioxide (Amorphous Glass)

Blue Goldstone

Synthetic glass with copper or cobalt/manganese inclusions

Raw quartz crystal

Quartz (silicon dioxide, SiO₂), likely milky or included quartz

Possible iron meteorite fragment

Iron meteorite, likely kamacite–taenite alloy

Native copper-bearing rock (probable copper ore)

Native copper (Cu), likely with copper sulfide/oxide minerals in a host rock

Iron Meteorite

Siderite (Iron-Nickel Alloy), predominantly Kamacite and Taenite (Fe, Ni)

Iron meteorite (probable, possibly industrial iron slag)

Fe–Ni metallic alloy, commonly kamacite and taenite

Arsenopyrite in Sulphide Ore

Arsenopyrite (FeAsS)

Copper-bearing rock, likely native copper in a weathered matrix

Native copper (Cu), tentatively with copper sulfide/oxide minerals

Tumbled milky chalcedony (likely common opalite-like quartz)

Chalcedony, microcrystalline SiO₂; possibly pale common opal, hydrated SiO₂·nH₂O

Colorless quartz crystal (likely quartz fragment)

Quartz, silicon dioxide (SiO₂)

Green sea glass (likely)

Man-made glass, likely soda-lime silicate glass; not a natural mineral or rock

Opalite

Synthetic Opalised Glass

Bismuth

Native Bismuth (Bi)

Bismuth crystal aggregate

Bismuth (Bi), commonly laboratory-grown

Obsidian (likely black volcanic glass)

Obsidian; primarily amorphous volcanic silica glass, approximately SiO₂-rich rhyolitic composition

Blue Goldstone

Aventurine Glass (SiO2 with Cobalt/Copper inclusions)

Iron Meteorite (likely Chondrite or Iron-Nickel fragment)

Siderite (Iron Meteorite), primarily Fe-Ni (Iron-Nickel) alloy

Blue Goldstone

Synthetic Aventurescent Glass (Cobalt-doped soda-lime glass)

Cullet (Slag Glass)

Amorphous Silica (Industrial byproduct)