Mineral Specimen

Small polished metallic mineral specimen

Indeterminate from image; possibly galena or hematite

Blue-green tumbled mineral specimen

Indeterminate; possibly chrysocolla, turquoise, or azurite–malachite material

Blue-gray mineral specimen (possibly sodalite)

Undetermined; appearance may be consistent with sodalite (Na₈Al₆Si₆O₂₄Cl₂), but the image is insufficient for reliable identification

Unidentified gray rock/mineral specimen

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

Small brown mineral specimen, possibly mica-bearing rock

Unidentified from the image; exact mineral species cannot be determined at this scale

Likely quartz-rich mineral specimen

Quartz (SiO₂), possibly milky quartz or quartz-bearing rock

Quartz-rich blue mineral specimen, possibly blue quartz or chrysocolla-bearing quartz

Quartz (SiO₂), with unidentified blue secondary mineral or inclusions

Orange-brown tumbled mineral specimen

Indeterminate; possibly iron-stained chalcedony, quartz, or jasper

Green copper-oxide mineral specimen, likely malachite-bearing rock

Malachite, Cu₂CO₃(OH)₂; identification from the image is provisional

Blue-green mineral specimen, likely fluorite

Fluorite (calcium fluoride, CaF₂), tentative identification

Small blue mineral specimen, possibly sodalite

Sodalite, Na₈(Al₆Si₆O₂₄)Cl₂ (tentative identification)

Small dark mineral specimen, possibly hematite or magnetite

Indeterminate from the image; possible hematite (Fe₂O₃) or magnetite (Fe₃O₄)

Blue crystal/mineral specimen (possibly blue quartz or dyed stone)

Uncertain from photograph; possible quartz, SiO₂, or a blue copper-bearing mineral

Blue-green mineral specimen, likely amazonite

Amazonite, a green variety of microcline feldspar (KAlSi₃O₈)

Dark metallic-looking mineral specimen, possibly magnetite

Magnetite (Fe₃O₄), tentative identification

Blue-gray botryoidal mineral specimen

Likely botryoidal chalcedony or hemimorphite; species cannot be confirmed from the image alone

Mixed Rock and Mineral Specimen Set

Multiple (Quartz, Chert, Shale)

Iron-rich mineral specimen, possibly magnetite-rich ore

Possibly magnetite (Fe₃O₄), with associated iron oxides; identification is uncertain from the photograph

Likely raw metallic mineral specimen

Unidentified; possibly galena-bearing ore or magnetite-rich rock

Rough pale-green mineral specimen, likely fluorite

Fluorite (CaF₂), tentative visual identification

Small green mineral specimen, possibly aventurine or serpentine

Uncertain; likely quartz-bearing aventurine (SiO₂) or serpentine-group mineral

Green copper-bearing mineral specimen, possibly chrysocolla or malachite

Tentatively chrysocolla, hydrated copper aluminosilicate; may include malachite, Cu₂CO₃(OH)₂

Dark metallic mineral specimen, possibly hematite or magnetite

Hematite (Fe₂O₃) or magnetite (Fe₃O₄); exact identification requires testing

Polished golden mineral specimen, likely golden calcite or citrine quartz

Identification uncertain from the photograph; possibilities include calcite (CaCO₃) or quartz (SiO₂), with the color potentially enhanced by polishing or coating

Tumbled pale-green mineral specimen, likely calcite or prehnite

Probably calcite (CaCO₃) or prehnite (Ca₂Al₂Si₃O₁₀(OH)₂); exact identification requires testing

Green mineral specimen (likely prehnite or chrysoprase)

Tentatively prehnite, Ca₂Al₂Si₃O₁₀(OH)₂; chrysoprase (microcrystalline quartz) is an alternative

Blue-gray rough mineral specimen, possibly kyanite

Undetermined; kyanite is a possible identification (Al₂SiO₅)

Quartz-bearing dark mineral specimen, likely schorl tourmaline in quartz

Quartz (SiO₂) with probable schorl tourmaline (NaFe₃Al₆(BO₃)₃Si₆O₁₈(OH)₄)

Small rough mineral specimen, likely quartz-bearing stone

Indeterminate from image; possibly quartz (SiO₂) with iron-oxide staining

Blue-green mineral specimen, possibly turquoise

Uncertain from the image; turquoise is hydrated copper aluminum phosphate, CuAl₆(PO₄)₄(OH)₈·4H₂O

Blue-green copper mineral specimen, likely chrysocolla with malachite and quartz

Chrysocolla (hydrated copper aluminum silicate; approximate formula (Cu,Al)₂H₂Si₂O₅(OH)₄·nH₂O), possibly mixed with malachite (Cu₂CO₃(OH)₂) and quartz

Blue-green mineral specimen, likely chrysocolla or turquoise

Chrysocolla: hydrated copper phyllosilicate, approximately Cu₂H₂O₅Si; Turquoise: CuAl₆(PO₄)₄(OH)₈·4H₂O

Small polished dark mineral specimen

Indeterminate; possibly black tourmaline (schorl) or hematite

Small yellow mineral specimen (possibly sulfur)

Unidentified; appearance alone is insufficient to confirm sulfur

Tumbled dark metallic mineral specimen, possibly hematite or magnetite

Hematite (Fe₂O₃) or magnetite (Fe₃O₄); visual identification is uncertain

Pink-purple rough mineral specimen (possibly lepidolite-bearing mica)

Lepidolite, a lithium-rich mica; identification is uncertain from the photo

Green glassy mineral specimen, likely nephrite or serpentine

Indeterminate from image; possible nephrite jade (interlocking amphibole, chiefly Ca₂(Mg,Fe)₅Si₈O₂₂(OH)₂) or green serpentine (Mg₃Si₂O₅(OH)₄)

Green-and-white rough mineral specimen, possibly amazonite

Unconfirmed; possible amazonite, a green variety of microcline feldspar (KAlSi₃O₈)

Metallic gray mineral specimen, possibly galena or metallic ore

Uncertain from photograph; galena (PbS) is a possibility, but iron sulfide or industrial metal slag cannot be excluded

Blue glassy mineral specimen, possibly dyed or synthetic

Uncertain; possible blue fluorite (CaF₂), dyed chalcedony, or man-made glass

Green glass-like mineral specimen, likely fluorite

Fluorite (calcium fluoride, CaF₂), if natural; appearance may also indicate colored glass

Quartz-rich mineral specimen, possibly druzy quartz

Quartz (silicon dioxide, SiO₂), possibly with minor calcite or feldspar