Mineral (Native Element Alloy)

Diamond

C (Native Carbon)

Pallasite Meteorite

Pallasite (ST-class)

Pegmatitic quartz–feldspar rock with dark mica or garnet

Granitic pegmatite; chiefly quartz (SiO₂), feldspar, and biotite/muscovite, possibly garnet

Native Gold in Quartz Host

Hydrothermal Gold (Au) in Quartz (SiO2)

Native gold in quartz matrix

Native gold (Au), with quartz (SiO₂) and possibly sulfide minerals

Chrysocolla in Cuprite / Mixed Copper Ore

Hydrated copper silicate and copper(I) oxide, (Cu,Al)2H2Si2O5(OH)4·nH2O and Cu2O

Gold Ore

Native Gold (Au) in Matrix

Lepidolite

K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2

Iron-rich sulfide ore (likely pyrite-bearing rock)

Likely pyrite (FeS₂) with dark host rock; exact identification is uncertain from the image alone.

Lepidolite

Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)

Celestite

Celestine (SrSO4)

Likely pyrite (“fool’s gold”) fragment

Pyrite, FeS₂

Turquoise

CuAl6(PO4)4(OH)8·4H2O

Turquoise

CuAl6(PO4)4(OH)8·4H2O

Desert Rose

Gypsum rosette (Hydrous calcium sulfate, CaSO4·2H2O)

Milky Quartz

Silicon dioxide (SiO2)

Pegmatite

Igneous Pegmatite (felsic intrusive rock)

Obsidian

Obsidian (Volcanic Glass; SiO2 content > 70%)

Graphite-rich schist (probable)

Graphite schist; primarily graphite (C) with mica and quartz

Pink Tourmaline (Rubellite) in Lepidolite

Elbaite (Na(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)4) in Lepidolite (K(Li,Al)3(Al,Si,Rb)4O10(F,OH)2)

Iron Meteorite

Iron-Nickel Alloy (Kamacite and Taenite)

Malachite-bearing copper ore

Malachite (Cu₂CO₃(OH)₂), likely mixed with chrysocolla, copper oxides, and host rock

Turquoise

CuAl6(PO4)4(OH)8·4H2O

Raw Topaz (or Smoky Quartz)

Al2SiO4(F,OH)2 / Silicon Dioxide (SiO2)

Raw fluorite-bearing rock, possibly fluorite in quartz/calcite matrix

Fluorite (CaF₂), with likely quartz (SiO₂) and/or calcite (CaCO₃) gangue

Lepidolite

K(Li,Al)3(Al,Si,Rb,Cs)4O10(F,OH)2

Arfvedsonite in Matrix

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

Rough Diamond

Diamond (Native Carbon, C)

Rough Diamond

Diamond (Native Carbon, C)

Rough Diamond

Diamond (Native Carbon, C)

Gold Ore (Lode Gold)

Native Gold (Au) in Matrix

Diamond

Diamond (Native Carbon, C)

Gold Ore

Native Gold in Quartz (Au)

Diamond (in jewelry setting)

Diamond (Native Carbon, C)

Gold Ore

Native Gold (Au) in Matrix

Small brown mineral/rock fragment

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

Turquoise

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

Small yellow mineral specimen, possibly sulfur

Unidentified; native sulfur (S) is a possibility

Ruby

Corundum (Al2O3)

Gold-bearing Quartz

Native Gold (Au) in Quartz (SiO2) matrix

Polished blue agate geode slice

Chalcedony (microcrystalline quartz), SiO₂, with possible quartz/drusy lining and iron-oxide coloration

Lepidolite with Tourmaline in Quartz Matrix

K(Li,Al)3(Si,Al)4O10(F,OH)2 (Lepidolite) / SiO2 (Quartz)