Anthropic Metallic Specimen

Schalenblende

Sphalerite with Wurtzite, Galena, and Marcasite/Pyrite

Likely galena-bearing ore or metallic sulfide specimen

Probably galena (PbS), possibly mixed with pyrite or other sulfides

Iridescent chalcopyrite (“peacock ore”)

Chalcopyrite, CuFeS₂, commonly surface-tarnished to bornite-like colors

Galena-bearing ore (probable)

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

Uncertain dark metallic mineral specimen, possibly specular hematite or magnetite

Likely hematite (Fe₂O₃) or magnetite (Fe₃O₄); image alone is insufficient for firm identification

Obsidian (likely snowflake or sheen obsidian)

Volcanic glass, predominantly silica-rich rhyolitic composition (approximately 70–75% SiO₂)

Peacock ore (iridescent chalcopyrite, possibly bornite)

Chalcopyrite, CuFeS₂; the iridescent surface may be natural tarnish or artificial acid treatment. Similar material is bornite, Cu₅FeS₄.

Fluorite

Calcium Fluoride (CaF2)

Gold Ore

Native Gold (Au) in Matrix

Iridescent bismuth crystal

Bismuth (Bi), artificially crystallized and likely oxidized/coated

Galena-bearing sulfide specimen

Galena (PbS), possibly with sphalerite and iron sulfides

Probable magnetite-bearing rock

Magnetite (Fe₃O₄), possibly in a fine-grained host rock

Mica Schist

Mica Schist (predominantly Muscovite or Biotite sheet silicates)

Aura Quartz (Titanium/Rainbow Quartz)

SiO2 (Silicon Dioxide) with metallic coating

Polished pallasite meteorite

Pallasite: olivine (Mg,Fe)₂SiO₄ in an Fe–Ni metal matrix

Pyrite-bearing metamorphic rock (likely greenschist or phyllite)

Quartz–chlorite–mica schist/phyllite with disseminated pyrite (FeS₂)

Gold-bearing dark rock, possibly magnetite with iron-oxide staining

Likely magnetite (Fe₃O₄) with limonite/goethite; metallic patches may be gold or weathered sulfide, unconfirmed

Pyrite

Iron Disulfide (FeS2)

Chalcopyrite

CuFeS2 (Copper Iron Sulfide)

Peacock Ore (Treated Chalcopyrite)

Copper Iron Sulfide (CuFeS2) coated with oxides

Chalcopyrite

Copper Iron Sulfide (CuFeS2)

Sunstone

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

Iron-rich laterite or weathered ironstone

Laterite/limonite-rich ferricrete, composed mainly of iron oxyhydroxides such as goethite and limonite with clay minerals and quartz

Copper-bearing quartz/rock fragment with attached mica

Chalcopyrite-bearing quartz or altered igneous rock; attached flake likely muscovite or biotite mica

Weathered quartz-rich rock, possibly milky quartz or quartzite

Quartz (SiO₂), possibly quartzite with iron-oxide and dark-mineral inclusions

Basalt

Basalt (Mafic volcanic rock)

Possible pyrite-bearing gabbro or diorite

Coarse-grained mafic/intermediate intrusive rock; likely plagioclase + amphibole/pyroxene with disseminated pyrite (FeS₂)

Bismuth crystal aggregate

Bismuth (Bi), commonly laboratory-grown

Iron meteorite fragment (likely weathered meteorite)

Fe–Ni metal, commonly kamacite with taenite; possible stony-iron or iron-oxide fusion crust

Sunstone

Oligoclase (Feldspar variety)

Vesicular basalt (possibly scoria)

Basalt; predominantly plagioclase, pyroxene, and olivine, with vesicles formed by escaping gas

Basalt (with possible weathering)

Basalt

Schist (Micaceous Schist)

Mica Schist

Copper-bearing sulfide ore, possibly chalcopyrite-rich

Chalcopyrite (CuFeS₂), possibly with bornite and oxidation products

Vesicular basalt (possibly industrial slag)

Basalt, chiefly plagioclase + pyroxene ± olivine; exact identification is uncertain from the image

Iron-rich vesicular rock, possibly slag or weathered basalt

Identification uncertain; likely ferruginous basalt/ironstone, with possible anthropogenic iron slag

Copper ore, likely native copper in a host rock

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

Pyrite in Matrix

Iron Sulfide (FeS2)

Rainbow Pyrite

Iron Sulfide (FeS2) with iridescent oxidation

Gold-Bearing Quartz Ore

Crystalline Silicon Dioxide (SiO2) with Trace Aurum (Au)

Native copper nugget

Copper (Cu), often with cuprite or copper-oxide surface

Likely weathered metallic mineral or slag fragment

Indeterminate; possibly iron-rich sulfide/oxide material or industrial slag