Mineral (Native Element)

Desert Rose

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

Likely pyrite (“fool’s gold”) fragment

Pyrite, FeS₂

Celestite (Celestine)

Strontium Sulfate (SrSO4)

Celestite (Celestine)

Strontium Sulfate (SrSO4)

Celestite (Celestine)

Strontium sulfate (SrSO4)

Gold-bearing quartz or ironstone fragment

Quartz (SiO₂) with possible native gold and iron oxides

Gold-bearing quartz vein in dark host rock

Native gold (Au) with quartz (SiO₂), likely in slate, schist, or altered volcanic rock

Lepidolite

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

Lepidolite

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

Diamond

C (Native Carbon)

Gold-bearing quartz vein specimen

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

Native copper

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

Native Copper

Copper (Cu)

Arsenic (Native)

Arsenic (As)

Native Sulfur

Sulfur (S8)

Native Gold

Gold (Au)

Malachite-bearing copper ore

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

Turquoise

CuAl6(PO4)4(OH)8·4H2O

Native gold nugget

Gold (Au), commonly with minor silver or copper

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)

Quartz-rich pegmatitic rock (likely quartz–feldspar–mica specimen)

Granitic pegmatite; mainly quartz (SiO₂), feldspar, and dark mica/amphibole

Blue Celestite

Celestine (Strontium Sulfate, SrSO4)

Native silver specimen

Silver (Ag), probably crystallized native silver with associated gangue

Copper-bearing Basalt with Epidote and Quartz

Native copper in basalt amygdaloidal matrix

Quartz-rich pegmatitic rock, possibly tourmaline-bearing granite

Granitic pegmatite; predominantly quartz (SiO₂), feldspar, and mica, with possible schorl tourmaline

Small gold-colored mineral crystal, likely pyrite

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

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

Polished native copper

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

Amygdaloidal Basalt

Amygdaloidal Basalt (Mafic volcanic rock)

Erythrite on Matrix

Cobalt Bloom (Co3(AsO4)2·8H2O)

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)

Lepidolite

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

Native silver (likely)

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