Anthropic Metallic Specimen

Galena

Galena (lead sulfide, PbS)

Galena

Galena (lead sulfide, PbS), likely with associated sulfide minerals

Likely galena-bearing ore

Galena (lead sulfide, PbS), possibly mixed with sulfide minerals

Polished pyrite (likely)

Pyrite, FeS₂; possibly a pyrite-rich sulfide specimen

Likely magnetite-bearing rock

Magnetite (Fe₃O₄), possibly in a mafic host rock

Silver (Native Element)

Silver (Ag) in an alloy of 90% Silver and 10% Copper

Iron-rich sulfide-bearing rock, likely pyrite-rich shale or limonite-goethite specimen

Likely pyrite (FeS₂) with oxidation products goethite/limonite (FeO(OH)·nH₂O), possibly in shale or quartz matrix

Likely galena (lead ore)

Galena, PbS (lead sulfide)

Gold Ore (in Quartz/Gossan matrix)

Native Gold (Au) in Limonite/Quartz matrix

Pyrite (“fool’s gold”)

Pyrite, iron disulfide (FeS₂)

Carborundum

Silicon Carbide (SiC)

Rainbow Hematite Ring

Iron(III) oxide (Fe2O3) with thin-film coating

Chalcopyrite

Copper Iron Sulfide (CuFeS2)

Galena (with Matrix)

Lead Sulfide (PbS)

Turquoise (with Hematite)

CuAl6(PO4)4(OH)8·4H2O

Hematite (Specularite)

Fe2O3 (Iron(III) oxide)

Pyrite in Matrix with Copper Alterations

Iron Sulfide (FeS2) with secondary Copper carbonates/sulfides

Green Fluorite with Galena

Calcium Fluoride (CaF2) with Lead Sulfide (PbS)

Molybdenite in Quartz

Molybdenite (MoS2) with Quartz (SiO2)

Dark rounded pebble

Likely basalt or fine-grained mafic volcanic rock

Chondrite Meteorite

L or H Ordinary Chondrite

Specular Hematite (Specularite)

Hematite (Fe2O3)

Pyrite-bearing quartz vein rock

Pyrite (FeS₂) with quartz (SiO₂), likely in a schistose or altered host rock

Peacock ore (bornite/chalcopyrite), likely treated

Bornite, Cu₅FeS₄, and/or chalcopyrite, CuFeS₂

Metallic sulfide-bearing rock, possibly galena-bearing ore

Probable galena (PbS) with pyrite and quartz/matrix; exact identification requires testing

Pyrite-bearing Rock

Iron Sulfide (FeS2) associated with host rock

Gold in Quartz Matrix

Native Gold (Au) with Quartz (SiO2)

Galena in Quartz Matrix

Lead Sulfide (PbS) in Silicon Dioxide (SiO2)

Galena (likely argentiferous galena)

Galena, PbS; commonly cubic or massive lead sulfide, sometimes containing silver

Pyrite-bearing metamorphic rock, likely pyrite schist or pyrite-rich slate

Pyrite (FeS₂) in a foliated quartz–mica-rich host

Native gold nugget or flake

Native gold (Au), possibly with minor silver/electrum

Gold in Matrix

Native Gold (Au)

Tiger's Eye (with Hematite/Jasper)

SiO2 (Silicon Dioxide) with Fe2O3 (Hematite)

Tiger's Eye (with Hematite/Magnetite matrix)

Pseudomorph of Quartz after Crocidolite (SiO2 with FeOOH/Fe2O3)

Tiger Iron

Tiger Iron (Hematite, Red Jasper, and Chert/Tiger's Eye composite)

Peacock Ore (Chalcopyrite/Bornite)

Bornite (Cu5FeS4) or iridescent treated Chalcopyrite (CuFeS2)

Native silver (probable)

Elemental silver, Ag, likely with oxidized sulfide or copper minerals

Galena-rich sulfide specimen

Galena (lead sulfide, PbS), possibly with sphalerite or other sulfides

Pyrite Nodule

Iron Sulfide (FeS2)

Native bismuth

Bismuth (Bi), commonly forming hopper crystals or aggregates

Mica Schist with Pyrite

Mica Schist (FeS2 containing)

Specular Hematite

Hematite (Fe2O3)