Mineral (Native Element Alloy)

Native copper-bearing rock

Native copper (Cu), likely with copper oxides/carbonates in a host rock

Silver (Native Silver Mineral)

Ag (Native Silver), Alloyed 90% Ag / 10% Cu

Azurite with native copper

Azurite (Cu₃(CO₃)₂(OH)₂) with native copper (Cu)

Polished native copper nugget

Native copper (Cu), likely with cuprite/tenorite and iron-oxide alteration

Copper-bearing rock, likely oxidized native copper ore

Native copper (Cu) with copper-oxide/carbonate minerals, possibly chrysocolla, malachite, and cuprite in a limonitic host

Native Copper

Copper (Cu)

Collection of Minerals and Ores

Various (e.g., Uraninite (U3O8), Carbon (C), Native Gold (Au), Hematite (Fe2O3), Galena (PbS), etc.)

Graphite

Graphite (Chemical Formula: C)

Buffalo Nickel (Indian Head Nickel)

Cupronickel (75% Copper, 25% Nickel)

Copper Nugget

Native Copper (Cu)

Iron Meteorite / Limonite-coated Meteorite / Iron Nodule

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

Diamond (in jewelry)

Element Carbon (C)

Native Copper

Native Copper (Cu)

Native Copper

Copper (Cu)

Pegmatite with Tourmaline and Quartz

Igneous Pegmatite

Metal Alloy (Likely Pewter or Sterling Silver)

Not a natural geological specimen; composed of refined metals. If pewter, it's a tin-based alloy. If sterling silver, it's 92.5% silver and 7.5% other metals (usually copper).

Native Copper with Malachite/Oxide Coating

Native Copper (Cu)

Native Copper

Copper (Cu)

Diamond (or Simulant)

Carbon (C)

Silver Nugget

Native Silver (Ag)

Likely gold-colored metal ring with a possible gemstone

Uncertain; possibly gold alloy (Au) with a small quartz or glass-like setting

Native Gold in Quartz

Native Gold (Au)

Native Gold

Native Gold (Au)

Native copper-rich iron meteorite (likely Canyon Diablo/meteorite-like specimen)

Iron–nickel alloy, chiefly kamacite and taenite (Fe-Ni), with oxidized copper/iron sulfide inclusions

Quartz-bearing Pegmatite with Metallic Sulfides

Pegmatite / Quartz-Feldspar Matrix with Pyrite and Mica

Gold Nugget / Native Gold

Native Gold (Au)

Gold Nugget

Native Gold (Au)

Diamond

Diamond (pure Carbon, C)

Gold Mineral

Native Gold (Au)

Diamond

Diamond (C)

Gold Flake / Placer Gold

Native Gold (Au)

Gold Nugget

Native Gold (Au)

Celestite

Celestine (SrSO4)

Gold

Native gold (Au)

One Pound Coin (UK)

Nickel-Brass Alloy (Cu-Zn-Ni)

Diamond (set in jewelry)

Carbon (C)

Native Copper within Host Rock

Native Copper (Cu)

Unidentified gray metallic object

Not determinable from the image; likely a metal screw or manufactured fastener rather than geological material

Gold Nugget

Native Gold (Au)

Pegmatite

Igneous Pegmatite

Gold Nugget / Placer Gold

Native Gold (Au)

Gold Nugget

Native Gold (Au)