Mineral Specimen

Quartz Mineral Specimens

Quartz (Silicon Dioxide, SiO2)

Likely metallic mineral specimen

Probably galena (lead sulfide, PbS), though visual identification is uncertain

Metallic sulfide mineral specimen, likely pyrite

Pyrite (FeS₂), possibly a pyrite-rich sulfide aggregate

Unidentified gray rock/mineral specimen

Indeterminate; possibly quartz-rich rock or a metallic sulfide-bearing specimen

Calcite–fluorite mineral specimen with iron-oxide staining

Calcite (CaCO₃), likely fluorite (CaF₂), with possible quartz and iron/manganese oxides

Blue-green copper mineral specimen, likely chrysocolla-bearing rock

Chrysocolla, hydrated copper phyllosilicate: approximately (Cu,Al)₂H₂Si₂O₅(OH)₄·nH₂O; possibly mixed with malachite or chrysocolla matrix

Tumbled pale green mineral specimen, likely calcite

Calcite (CaCO₃), tentative identification

Mixed rock and mineral specimen collection

Multiple species, likely quartz (SiO₂), calcite (CaCO₃), feldspar, chert, and assorted volcanic/sedimentary rocks

Blue-green raw mineral specimen, likely apatite

Fluorapatite, Ca₅(PO₄)₃F (probable; visual identification only)

Pale green rough mineral specimen, likely serpentine or calcite

Probable serpentine-group mineral, Mg₃Si₂O₅(OH)₄; possibly pale-green calcite, CaCO₃

Blue quartz-like mineral specimen

Likely quartz (SiO₂), possibly dyed or coated; exact identification requires testing

Blue mineral specimen, likely bornite (“peacock ore”)

Bornite, Cu5FeS4, possibly iridescent chalcopyrite (CuFeS2)

Blue-green copper mineral specimen, likely chrysocolla or turquoise

Probable chrysocolla, hydrated copper phyllosilicate (Cu₂H₂Si₂O₅(OH)₄·nH₂O); turquoise, CuAl₆(PO₄)₄(OH)₈·4H₂O, is an alternative

Green copper-mineral specimen, likely chrysocolla or copper-bearing serpentine

Tentatively chrysocolla (hydrated copper phyllosilicate, approximately (Cu,Al)2H2Si2O5(OH)4·nH2O); exact identification requires testing

Mixed Mineral Specimens

Mixed Silicates, Oxides, and Phosphates (SiO₂, Ca₅(PO₄)₃(F,Cl,OH), Na₈Al₆Si₆O₂₄Cl₂, etc.)

Rough amber-like brown mineral specimen

Uncertain from photograph; possibly iron-stained quartz, common opal, or resinous amber

Quartz (Variety of Rough Mineral Specimens)

Silicon Dioxide (SiO2)

Banded calcite/aragonite mineral specimen (tentative)

Calcite (CaCO₃), possibly with aragonite or crystalline carbonate growth

Tumbled or cut iron-rich mineral specimen

Likely limonite/goethite (hydrated iron oxides), possibly weathered hematite

Mixed Mineral Assortment (Pyrite, Kyanite, Agate, Jasper)

FeS2 (Pyrite), Al2SiO5 (Kyanite), SiO2 (Agate/Jasper)

Shark Tooth Fossil

Carcharodonta (order Lamniformes), likely Carcharias spp.

Tumbled Mineral Collection (Amethyst, Celestite, K2 Jasper, Rose Quartz, Ruby in Zoisite, Que Sera Stone)

Mixed Mineral Specimens (Quartz SiO2, Celestite SrSO4, Corundum Al2O3 with Zoisite, etc.)

Raw greenish-blue quartz-bearing mineral specimen

Likely fluorite or chalcedony/quartz; exact identification requires hardness and crystal tests

Quartz-bearing rock or quartz-rich mineral specimen

Quartz, silicon dioxide (SiO₂); exact host rock is uncertain from the image

Calcite (likely chalky calcite fragment)

Calcite, calcium carbonate (CaCO₃)

Weathered sandstone or granitic rock fragment

Likely quartz-rich sandstone; exact identification requires testing

Chrysocolla-rich copper ore

Chrysocolla, a hydrated copper aluminosilicate (approximately (Cu,Al)₂H₂Si₂O₅(OH)₄·nH₂O), possibly mixed with malachite or turquoise-group minerals

Hematite

Iron(III) oxide (Fe2O3)

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Pyrite-bearing metamorphic rock (likely schist or gneiss)

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

Asphalt (Bituminous Concrete)

Bituminous Concrete / Pavement

Copper Ore Specimen

Cupriferous Rock / Malachite-bearing ore

Muscovite Mica

KAl2(AlSi3O10)(OH)2

Copper Ore / Altered Granodiorite

Cupriferous rock with silicate gangue

Granite

Felsic intrusive igneous rock

Epidote

Epidote (Ca2(Al, Fe)3(SiO4)3(OH))

Calcite

Calcium Carbonate (CaCO3)

Malachite-bearing Rock

Cu2CO3(OH)2

Galena

Lead Sulfide (PbS)

Graphite

Carbon (C)

Muscovite Mica

KAl2(AlSi3O10)(OH)2

Chrysotile Asbestos

Chrysotile (Mg3Si2O5(OH)4)