Mineral (Native Element)

Ruby

Corundum (Al2O3)

Diamond

Diamond (pure Carbon, C)

Rough Diamond

Diamond (pure Carbon, C)

Diamond

Carbon (C)

Lepidolite Pebble

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

Raw Diamond

Carbon (C)

Silicon

Crystalline Silicon (Si)

Diamond (in a jewelry setting)

Cubic Carbon (C)

Aquamarine

Beryl (Be3Al2Si6O18 with trace Fe2+)

Fossil bone, possibly a vertebra

Fossilized vertebrate bone; exact taxon cannot be determined from the image

Fossilized Bone Fragment

Permineralized Skeletal Element (Likely Vertebrate)

Likely sulfur-bearing rock (possibly native sulfur)

Native sulfur (S), though the image alone cannot confirm the specimen’s identity

Diamond

C (Carbon)

Diamond

Carbon (C)

Diamond

Carbon (C)

Rough Diamond

Diamond (pure Carbon, C)

Native Copper Bearing Basalt

Cu

Sunstone

Feldspar group (Plagioclase / Oligoclase)

Small brown mineral/rock fragment

Indeterminate; possibly weathered quartz-rich rock, ironstone, or a sulfide mineral

Gold Nugget

Native Gold (Au)

Turquoise

CuAl6(PO4)4(OH)8·4H2O

Small metallic mineral fragment

Unidentified metallic sulfide or native-metal fragment

Eudialyte in Matrix

Na15Ca6Fe3Zr3Si26O72(OH,Cl,H2O)3

Gold

Native Gold (Au)

Gold Nugget

Native Gold (Au)

Turquoise

CuAl6(PO4)4(OH)8·4H2O (Hydrated copper aluminum phosphate)

Polished copper nugget

Native copper (Cu)

Polished fossil tooth or jaw fragment

Indeterminate vertebrate dental/bone fossil; likely mineralized enamel and dentine

Native copper nugget

Copper (Cu), commonly with cuprite and copper-oxide alteration

Celestine (Celestite)

Strontium sulfate (SrSO4)

Quartz-rich pegmatite (likely milky quartz with feldspar)

Pegmatitic quartz–feldspar rock; primarily SiO₂ quartz with K-feldspar/plagioclase

Diamond (Blue Diamond)

Native Carbon (C)

Gold in Quartz Matrix

Native Gold (Au) with Quartz (SiO2)

Turquoise

CuAl6(PO4)4(OH)8·4H2O

Turquoise

CuAl6(PO4)4(OH)8·4H2O

Gold

Native Gold (Au)

Gold in Quartz or Basalt

Native Gold (Au)

Gold

Native Gold (Au)

Gold Nugget

Native Gold (Au)

Gold Nugget

Native Gold (Au)

Gold

Native Gold (Au)

Likely native copper nugget

Native copper (Cu)