Mineral Specimen

Pale green mineral specimen, likely serpentine or chrysoprase

Tentatively serpentine-group mineral (Mg₃Si₂O₅(OH)₄); chrysoprase is an alternative identification (microcrystalline quartz, SiO₂)

Dark green mineral specimen, possibly serpentine or epidote

Tentatively serpentine-group mineral, Mg₃Si₂O₅(OH)₄, or epidote, Ca₂(Al,Fe)₃Si₃O₁₂(OH)

Blue-green glassy mineral specimen, possibly chalcedony or slag glass

Uncertain; candidate minerals include chrysocolla-bearing chalcedony or copper-bearing glassy slag

Tumbled dark metallic mineral specimen

Likely hematite or magnetite; identification is uncertain from the photograph

Green glassy mineral specimen, likely chromium-bearing fluorite (tentative)

Fluorite, CaF₂, possibly green fluorite; identification uncertain from image

Green glassy mineral specimen, likely rough emerald or green fluorite

Tentatively beryl (Be₃Al₂Si₆O₁₈), emerald variety; synthetic/man-made glass cannot be excluded from the photograph

Tumbled blue-gray mineral specimen

Indeterminate; possibly dumortierite quartz, sodalite, or dyed stone

Tumbled blue glassy mineral specimen, possibly blue calcite or dyed quartz

Uncertain from image; likely calcite (CaCO₃) or dyed microcrystalline quartz (SiO₂)

Tumbled pale-green mineral specimen, likely aventurine or serpentine

Quartzite with fuchsite (aventurine) or serpentine-group mineral; exact identification requires testing

Green copper mineral specimen, likely chrysocolla or turquoise

Chrysocolla: hydrated copper aluminosilicate, approximately (Cu,Al)₂H₂Si₂O₅(OH)₄·nH₂O; possibly turquoise: CuAl₆(PO₄)₄(OH)₈·4H₂O

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

Blue-green glassy mineral specimen, likely aquamarine or pale fluorite

Tentatively beryl (Be₃Al₂Si₆O₁₈), aquamarine variety; identification is uncertain from the photograph

Likely fluorite-bearing mineral specimen

Fluorite (CaF₂), possibly with associated host rock; identification is uncertain from the dark, blue-lit image

Blue glassy mineral specimen, possibly blue topaz or aquamarine

Tentatively topaz (Al₂SiO₄(F,OH)₂) or beryl/aquamarine (Be₃Al₂Si₆O₁₈); identification is limited by severe image blur

Small yellow mineral specimen, possibly sulfur

Unidentified; native sulfur (S) is a possibility

Pale green rough mineral specimen, likely serpentine or calcite

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

Botryoidal blue-green mineral specimen, likely hemimorphite

Hemimorphite, Zn4Si2O7(OH)2·H2O; possibly associated with calcite or smithsonite

Tumbled blue-gray mineral specimen, likely labradorite

Labradorite, a calcium-rich plagioclase feldspar; approximate formula (Ca,Na)(Al,Si)₄O₈

Blue metallic mineral specimen, possibly bornite or chalcopyrite

Bornite (Cu₅FeS₄) or chalcopyrite (CuFeS₂); exact identification requires testing

Raw reddish-brown mineral specimen, possibly garnet

Garnet-group silicate, commonly almandine (Fe₃Al₂Si₃O₁₂); identification is uncertain from the blurred image

Uncertain dark metallic mineral specimen

Possibly galena (lead sulfide, PbS), though the image is too blurred for reliable identification

Small yellow-brown mineral specimen, likely citrine or yellow quartz

Quartz (SiO₂), possibly iron-colored citrine; identification is uncertain from the image

Blue quartz-like mineral specimen

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

Likely native metallic mineral specimen

Uncertain from photograph; possibly pyrite (FeS₂) or a sulfide-rich metallic ore

Blue mineral specimen, likely kyanite

Kyanite — Al₂SiO₅

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

Bornite, Cu5FeS4, possibly iridescent chalcopyrite (CuFeS2)

Blue-green glassy mineral specimen, likely turquoise-colored fluorite or dyed material

Uncertain; possible fluorite (CaF₂), chrysocolla, or dyed calcite/glass

Blue-green botryoidal mineral specimen, likely chrysocolla or chrysocolla-bearing quartz

Chrysocolla (hydrated copper phyllosilicate; variable composition, commonly approximated as (Cu,Al)₂H₂Si₂O₅(OH)₄·nH₂O)

Likely rough mineral specimen (possibly mica-rich)

Indeterminate from the image; a mica such as muscovite or biotite is one possibility

Polished blue glassy mineral specimen, likely sodalite or blue aventurine

Most consistent with sodalite (Na₈Al₆Si₆O₂₄Cl₂), though dyed quartzite or blue glass cannot be excluded from the photograph

Dark sulfide-bearing mineral specimen, possibly bornite or chalcopyrite

Likely chalcopyrite (CuFeS₂) or bornite (Cu₅FeS₄), with pale quartz or carbonate coating

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

Polished blue-gray mineral specimen, likely galena-bearing ore

Galena (PbS), possibly mixed with quartz/calcite and secondary copper minerals

Blue slag-like mineral specimen, possibly bornite or chalcopyrite

Tentatively bornite (Cu5FeS4) or iridescent chalcopyrite (CuFeS2)

Quartz-bearing dark mineral specimen

Quartz (SiO₂) on a dark host rock, possibly basalt or sulfide-rich ore

Pale green mineral specimen, likely prehnite or green calcite

Tentatively prehnite, Ca₂Al(AlSi₃O₁₀)(OH)₂; visual identification is uncertain from the photograph

Quartz-rich mineral specimen, possibly druzy quartz

Quartz (SiO₂), possibly with carbonate or feldspar matrix

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

Chrysocolla, hydrated copper silicate: approximately (Cu,Al)₂H₂Si₂O₅(OH)₄·nH₂O; possibly mixed with quartz or turquoise

Purple fluorite-bearing mineral specimen

Fluorite (calcium fluoride, CaF₂), possibly with quartz or chalcedony matrix

Polished metallic ore/mineral specimen, possibly pyrite-bearing schist

Indeterminate from image; likely pyrite (FeS₂) with quartz and/or mica in a metamorphic matrix

Quartz-rich mineral specimen, possibly druzy quartz with iron staining

Quartz (SiO₂), possibly coating a vesicular host rock