Mineral (Native Element)

Turquoise

CuAl6(PO4)4(OH)8·4H2O

Turquoise

CuAl6(PO4)4(OH)8·4H2O

Desert Rose

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

Gold-bearing quartz vein specimen

Native gold (Au) in quartz, likely with iron-oxide staining and possible sulfides

Turquoise

CuAl6(PO4)4(OH)8 · 4H2O

Turquoise

CuAl6(PO4)4(OH)8·4H2O

Turquoise

CuAl6(PO4)4(OH)8·4H2O

Malachite-bearing copper ore

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

Turquoise

CuAl6(PO4)4(OH)8·4H2O

Gold

Gold (Au)

Gold-bearing quartz or ironstone fragment

Quartz (SiO₂) with possible native gold and iron oxides

Native silver (likely)

Silver, Ag; possibly silver-bearing sulfide or mica contamination

Quartz geode (druzy quartz cavity)

Silica, SiO₂; microcrystalline-to-crystalline quartz lining a volcanic vesicle

Tumbled pink-orange feldspar

Microcline or orthoclase feldspar, KAlSi₃O₈ (tentative)

Small gold-colored mineral crystal, likely pyrite

Pyrite (FeS₂), tentatively; native gold is a less likely alternative

Blue lace agate (tumbled)

Microcrystalline quartz, SiO₂ (chalcedony variety)

Rough Diamond

Diamond (Native Carbon), C

Rough Diamond

Diamond (Native Carbon, C)

Copper Bullion Round

Native Copper (refined), Cu

Graphite

Graphite (Native Carbon, C)

Green beryl-bearing pegmatite (possibly aquamarine)

Beryl, Be₃Al₂Si₆O₁₈, in a coarse-grained granitic pegmatite

Quartz-rich pegmatite specimen

Pegmatite composed mainly of quartz (SiO₂), feldspar, and mica, with possible tourmaline or garnet inclusions

Copper and Quartz beads

Native Copper (Cu) and Crystalline Quartz (SiO2)

Lepidolite

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

Quartz-rich pegmatite fragment

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

Likely native silver

Silver (Ag), possibly with sulfide or other mineral impurities

Mica-rich pegmatite (likely muscovite-bearing granite)

Pegmatite; chiefly quartz (SiO₂), feldspar, and muscovite mica

Polished native copper

Native copper (Cu), likely with cuprite/tenorite oxidation products

Gold-bearing quartz vein specimen

Native gold (Au) in quartz (SiO₂), likely with iron-oxide staining

Graphite

Graphite (Native Carbon, C)

Erythrite on Matrix

Cobalt Bloom (Co3(AsO4)2·8H2O)

Amygdaloidal Basalt

Amygdaloidal Basalt (Mafic volcanic rock)

Native silver fragment (probable)

Silver, Ag; possibly silver-bearing sulfide or plated metal

Yellow Jadeite

NaAlSi2O6 (Sodium Aluminum Silicate)

Sandstone (Quartzite Pebble)

Arenite / Metamorphosed Sandstone (SiO2)

Sunstone

Plagioclase Feldspar (Na,Ca)(Si,Al)4O8

Turquoise

CuAl6(PO4)4(OH)8·4H2O

Turquoise

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

Turquoise

Turquoise - CuAl6(PO4)4(OH)8·4H2O

Gold-bearing quartz sulfide specimen

Native gold (Au) with quartz (SiO₂), likely associated with iron sulfides such as pyrite

Native copper (probable copper-rich mineral specimen)

Copper, Cu; possibly mixed with cuprite, malachite, and iron-oxide alteration minerals

Copper ore, likely native copper in a host rock

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