Mineral (Native Element)

Petrified Wood

Silicified Wood (primarily Quartz / Chalcedony: SiO2)

Pyrite-bearing sulfide specimen

Pyrite (FeS₂), possibly with chalcopyrite (CuFeS₂) and/or marcasite

Red jasper (likely brecciated jasper)

Microcrystalline quartz/chalcedony (SiO₂), iron-oxide stained

Turquoise

CuAl6(PO4)4(OH)8·4H2O (Hydrous copper aluminium phosphate)

Metallic sulfide ore, likely pyrite-bearing rock

Pyrite (FeS₂), possibly with chalcopyrite and quartz/host rock

Copper-bearing rock, possibly native copper in a weathered matrix

Likely copper minerals such as malachite (Cu₂CO₃(OH)₂) in an iron-rich host; exact identification is uncertain from the image

Raw gold nugget

Native gold (Au), possibly with minor quartz or silver

Gold-bearing quartz or iron-stained quartzite

Quartz (SiO₂), possibly with pyrite or native-gold flecks

Native gold-bearing rock (probable gold nugget/ore fragment)

Native gold, Au, associated with quartz and/or iron oxides

Gold Ore in Matrix

Native Gold (Au) in Quartz/Limonite host rock

Gold and Cubic Zirconia (San Judas Tadeo Pendant)

Native Gold (Au) with Synthetic Cubic Zirconia (ZrO2)

Iron-stained quartz-rich rock, possibly gold-bearing quartz

Quartz (SiO₂) with iron-oxide staining; possible limonite/goethite matrix

Quartz with Mica Schist Matrix

Quartz (SiO2) in Mica Schist Matrix

Turquoise

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

Weathered metallic sulfide fragment, possibly pyrite-bearing rock

Likely iron sulfide (pyrite, FeS₂) in a weathered host rock; exact identification requires testing

Pyrite (“fool’s gold”)

Iron disulfide, FeS₂; likely a pyrite-rich sulfide specimen

Weathered iron-rich rock, possibly limonite-bearing quartzite or altered basalt

Indeterminate; likely quartz (SiO₂) with iron oxides/hydroxides such as limonite/goethite

Quartz-rich gold-brown mineral specimen, possibly iron-stained quartz

Quartz (SiO₂), likely with limonite/goethite staining and minor sulfide or mica inclusions

Sandstone (Nut-stone / Cup-stone artifact)

Quartz Arenite / Worked Sedimentary Rock

Weathered quartz-bearing rock, possibly iron-stained quartzite or granitic pegmatite

Indeterminate; likely quartz-rich silicate rock with iron-oxide staining (SiO₂-dominant)

Amygdaloidal Basalt

Amygdaloidal Basalt (Mafic Volcanic Rock)

Petrified Wood

Silicified Wood (SiO2)

Native gold-bearing sulfide specimen

Native gold (Au), likely intergrown with pyrite (FeS₂) or chalcopyrite (CuFeS₂)

Native copper-bearing sulfide specimen

Likely chalcopyrite (CuFeS₂), possibly with native copper and iron oxides

Native metal specimen, likely galena or metallic slag

Probably galena (lead sulfide, PbS); identification is uncertain from the image alone

Turquoise

Turquoise, CuAl6(PO4)4(OH)8·4H2O

Argillite

Argillite (Fine-grained sedimentary rock composed mostly of clay-sized particles)

Agate and millefiori glass jewelry

Agate: microcrystalline quartz (SiO₂); millefiori element appears to be man-made glass

Polished quartz vein in iron-stained host rock

Quartz (SiO₂), likely with limonite/goethite and possible feldspathic or chalcedonic matrix

Native Gold (in Jewelry form)

Gold (Au)

Native Gold (in the form of jewelry)

Gold (Au)

Milky Quartz

Quartz (Silicon Dioxide, SiO2)

Amygdaloidal Basalt with Secondary Minerals

Basalt containing secondary mineralization (likely Chlorite, Celadonite, or Zeolites)

Polished copper-bearing rock, likely cuprite-rich copper ore

Cuprite (Cu₂O) with native copper and iron-oxide matrix, probable

Emerald

Beryl (Be3Al2Si6O18 with Chromium/Vanadium impurities)

Rose Quartz

Silicon dioxide (SiO2)

Pyrite-bearing quartz (likely chalcopyrite/pyr ite specimen)

Pyrite, FeS₂, with quartz (SiO₂) and possibly chalcopyrite, CuFeS₂

Turquoise

Turquoise - CuAl6(PO4)4(OH)8·4H2O (Hydrous phosphate of copper and aluminium)

Pyrite (iron pyrite), likely massive or granular specimen

Pyrite, FeS₂

Metallic sulfide-rich rock, possibly pyrite-bearing schist or marcasite specimen

Likely pyrite (FeS₂) in a foliated host rock; exact identification requires testing

Aura Turquoise or Treated Turquoise Beads

Hydrated copper and aluminum phosphate (CuAl6(PO4)4(OH)8·4H2O) with metallic coating

Native Gold (in earring form)

Gold (Au)