Unknown

Likely copper-bearing rock (identification uncertain)

Possibly native copper with copper oxides; the image is insufficient for a definitive identification

Polished chrysocolla cabochon

Chrysocolla, a hydrated copper phyllosilicate; commonly intergrown with quartz, malachite, or other copper minerals

Brecciated rock (possibly fault breccia)

Polymictic breccia; exact lithology cannot be determined from the photograph

Weathered dark mineral/rock fragment

Indeterminate; possibly iron-rich basalt, slag, or a sulfide-bearing mineral

Unidentifiable Specimen

Undetermined

Pale green rough mineral fragment, likely green fluorite

Fluorite (calcium fluoride, CaF₂) — identification is tentative from the photo

Rounded, weathered rock (likely quartz-rich granite or gneiss)

Undetermined quartz–feldspar-rich rock; precise identification requires closer examination

Pink potassium feldspar (likely orthoclase)

Orthoclase, KAlSi₃O₈

Milky quartz in a weathered host rock

Quartz (SiO₂), with an unidentified fine-grained matrix

Likely mica schist

Mica-rich schist, likely muscovite–biotite schist; exact identification requires examination

Gemstone ring (stone appears pale yellow, possibly citrine or glass imitation)

Undetermined; possible quartz variety citrine (SiO₂)

Dark, water-worn pebble (likely basalt)

Likely basalt; identification is provisional from the photograph

Reddish-brown rock fragment, possibly iron-stained sandstone

Unidentified iron-oxide-stained rock; sandstone is a tentative visual identification

Dark mineral nodule with white veining

Possibly a calcite-veined manganese- or iron-rich concretion; exact identification requires testing

Dark, veined metamorphic rock (possibly gneiss or schist)

Undetermined from the photograph; likely a foliated, quartz-veined metamorphic rock

Unknown Rock Specimen

Small dark mineral fragment, possibly mica or a metallic sulfide

Unidentified from image; possible biotite mica or iron sulfide (pyrite-group)

Granite

Granite, a coarse-grained felsic intrusive igneous rock composed mainly of quartz, feldspar, and mica

Fossil oyster shell

Fossilized bivalve mollusk shell; exact species and age cannot be determined from the image

Small pale rock fragment

Unidentified, likely a weathered granitoid or quartz-rich stone; image detail is insufficient for a precise identification

Weathered, vuggy quartz-rich rock (possibly quartz vein material)

Likely massive quartz (SiO₂) with iron-oxide staining and dark mineral inclusions; exact rock type cannot be confirmed visually.

White quartz crystal cluster (likely druzy quartz)

Quartz, SiO₂; likely a quartz-lined cavity fragment

Granite pebble

Granite, a coarse-grained felsic intrusive igneous rock

Weathered rock pebble, possibly quartz-rich sandstone

Uncertain from the image; likely quartz-bearing sandstone with iron-oxide staining

Tumbled brown stone, possibly amber or polished agate

Indeterminate from image; possibilities include amber (fossilized plant resin, organic) or chalcedony/quartz (SiO₂)

Iron-stained quartz-rich rock (likely weathered granite or quartzite)

Quartz–feldspar rock with iron-oxide staining; exact rock type cannot be confirmed from the image

Quartz-rich pegmatite

Granitic pegmatite, composed mainly of quartz and feldspar with dark mica or other accessory minerals

Unidentified polished multicolored stone, possibly granite or mixed-mineral rock

Indeterminate from the photograph; no diagnostic mineral texture or composition is clear

Druzy quartz fragment

Quartz, SiO₂, with a coating of tiny quartz crystals

Possible flint (dark chert) nodule

Microcrystalline quartz (SiO₂), commonly called chert or flint

Milky quartz

Quartz (silicon dioxide, SiO₂)

Iron-stained sandstone

Quartz-rich sandstone, likely ferruginous sandstone

Pink Himalayan Salt Rock (Halite)

Halite (Sodium Chloride, NaCl)

Iron-rich rock fragment (likely hematite/goethite-rich ironstone)

Ironstone, composed chiefly of iron oxides/hydroxides such as hematite (Fe₂O₃) and goethite (FeO(OH)); exact identification requires testing

Small reddish-brown mineral fragment, likely quartz-bearing rock

Indeterminate; possibly iron-stained quartz or feldspar-rich stone

Backlit translucent mineral specimen, possibly amber or orange calcite

Undetermined; visual appearance alone cannot distinguish amber from calcite or other translucent minerals

Serpentine (likely serpentinite)

Serpentinite, composed mainly of serpentine-group minerals such as lizardite, antigorite, or chrysotile; exact identification cannot be confirmed from the image alone.

Dark green-black stone, possibly serpentinite

Serpentinite (predominantly serpentine-group minerals; identification from photo is uncertain)

Dark green-black stone, likely serpentinite

Serpentinite; chiefly antigorite/lizardite/chrysotile group minerals, commonly with magnetite

Dark veined metamorphic rock, likely serpentinite

Serpentinite; predominantly serpentine-group minerals, possibly with magnesite or calcite veins

Inlaid turquoise and red-stone earrings

Likely turquoise (CuAl₆(PO₄)₄(OH)₈·4H₂O) with an unidentified red inlay; the image does not establish the materials

Tumbled green jade (likely serpentine or dyed quartz imitation)

Possibly nephrite jade, Ca₂(Mg,Fe)₅Si₈O₂₂(OH)₂; visual identification is uncertain