Mineral (Native Element Alloy)

Diamond

Native Carbon (C)

Diamond in Kimberlite

Diamond in Kimberlite Matrix (Diamond: C, Kimberlite: complex Potassic Peridotite)

Turquoise

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

Native Sulfur

Sulfur (S)

Native Silver

Silver (elemental Ag)

Limestone with Lichen/Algae

Sedimentary Calcium Carbonate (CaCO3)

Spiny Oyster Shell

Spondylus (Calcium Carbonate, CaCO3)

Turquoise

CuAl6(PO4)4(OH)8·4H2O

Metal Chain (Likely Steel or a Steel Alloy)

Steel (primarily iron and carbon); specific alloy unknown

Crocoite

Lead chromate (PbCrO4)

Turquoise (Rough)

Hydrated phosphate of copper and aluminium, CuAl6(PO4)4(OH)8·4H2O

Diamond

Native Carbon (C)

Diamond

Diamond (pure Carbon, C)

Arfvedsonite

Arfvedsonite [Na3(Fe2+,Mg)4Fe3+Si8O22(OH)2]

Diamond

Diamond (Pure Carbon, C)

Turquoise

CuAl6(PO4)4(OH)8·4H2O

Celestite (Celestine)

Strontium sulfate (SrSO4)

Diamond

Native Carbon (C)

Milky Quartz

Silicon Dioxide (SiO2)

Lepidolite

K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2 (Lithium-bearing Phyllosilicate)

Honey Calcite

Calcium Carbonate (CaCO3)

Sulfide Ore (likely Galena and Sphalerite in Quartz)

Lead-Zinc Ore (PbS and ZnS)

Native copper

Copper (Cu), often with malachite, cuprite, or matrix minerals

Native Copper

Copper (Cu)

Native Sulfur

Sulfur (S8)

Diamond (in jewelry setting)

Carbon (C)

Diamond (in jewelry setting)

Adamantine Carbon (C)

Fuchsite

Chromium-bearing Muscovite - K(Al,Cr)2(AlSi3O10)(OH)2

Red Jasper

Silicon Dioxide (SiO2) with Iron Oxide inclusions

Diamond

Diamond (pure carbon, C)

Metallic sulfide mineral specimen, possibly pyrite

Likely pyrite (FeS₂), though the photograph is insufficient for certainty

Copper and Quartz beads

Native Copper (Cu) and Crystalline Quartz (SiO2)

Native American Pottery Sherd

Ruby

Corundum (Al2O3 with Chromium traces)

White Sapphire

Corundum (Al2O3)

Diamond

Diamond (pure Carbon, C)

Rough Diamond

Carbon (C)

Pink quartz crystal, possibly rose quartz

Quartz (silicon dioxide, SiO₂), likely pink quartz/rose quartz

Diamond (specifically Blue Diamond color appearance)

Carbon (C) with trace Boron

Quartz-rich pegmatite

Granitic pegmatite, chiefly quartz (SiO₂), feldspar, and mica

Diamond

Carbon (C)

Fossilized bone fragment, possibly vertebra

Fossil bone (mineralized hydroxyapatite; exact taxon indeterminate)