Unknown (Likely Sedimentary Or Metamorphic)

Likely quartz-rich rock fragment

Indeterminate; possibly quartz-bearing granite or quartzite

Small quartz-rich rock fragment

Unidentified quartz-bearing rock; the image is insufficient for a precise identification

Iron-stained quartz-rich pebble

Likely quartz (SiO₂) with iron-oxide/hydroxide coatings; exact rock type cannot be determined from the image alone

Weathered volcanic breccia (possible basaltic-andesite breccia)

Volcanic breccia: angular to subrounded volcanic clasts in a finer volcanic matrix; exact composition cannot be confirmed from the photograph

Polished green stone bead, likely dyed howlite or magnesite

Possibly dyed Ca₂B₅SiO₉(OH)₅ (howlite) or MgCO₃ (magnesite); identification is uncertain from the photo

Tumbled gray stone, likely gray agate or jasper

Microcrystalline quartz (chalcedony), SiO₂; exact identification requires testing

Halite

Halite (NaCl)

Druzy quartz fragment

Quartz, SiO₂, with a coating of tiny quartz crystals

Weathered fossil fragment, possibly bone

Indeterminate fossilized bone; likely mineralized vertebrate bone (apatite-rich)

White jade-like beaded bracelet

Unverified; possibly milky quartz or white jade (nephrite jade or jadeite)

Likely weathered chert or flint nodule

Microcrystalline quartz (SiO₂), possibly chalcedony-rich chert

Dark, water-worn pebble (likely basalt)

Likely basalt; identification is provisional from the photograph

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

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

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

Serpentine-rich rock (possibly lizardite/serpentinite)

Serpentinite, composed chiefly of serpentine-group minerals such as lizardite, antigorite, or chrysotile

Greenstone pebble (identification uncertain from photo)

Greenstone, typically metamorphosed mafic rock composed of chlorite, actinolite, and epidote

Tiny metallic mineral grain (possibly native silver or a metallic sulfide)

Undetermined from the photograph; native silver (Ag) is one possibility, but identification requires examination or testing

Likely rhyolite or altered volcanic rock

Fine-grained felsic volcanic rock, probably rhyolite; exact identification is uncertain from the image

Possible fossilized bone fragment

Indeterminate vertebrate bone; no taxonomic identification is possible from the image alone

Rose quartz-bearing pegmatite

Quartz (SiO₂) with pink feldspar, likely potassium feldspar; exact identification is limited by the image

Honey-colored calcite

Calcite (CaCO₃)

Weathered rock with a tan mineral vein or inclusion

Indeterminate from the photograph; possibly a quartz- or feldspar-rich vein in dark metamorphic host rock

Quartz crystals, likely smoky quartz with iron-stained crystals

Quartz (SiO₂), trigonal crystal system

Fossilized bivalve shell

Bivalvia; likely a preserved shell or shell cast composed mainly of calcium carbonate (CaCO₃)

Variscite

AlPO4·2H2O

Jasper

SiO2

Polished fossil gastropod shell

Fossilized gastropod (snail) shell; exact taxon cannot be determined from the image

Quartz vein in host rock

Quartz (SiO₂) in an undetermined mineralized host rock

Likely iron-stained quartz or quartz-rich rock fragment

Quartz (SiO₂), possibly colored by iron oxides such as goethite or hematite

Likely serpentine (serpentinite) pebbles

Serpentine-group minerals, chiefly antigorite, lizardite, and/or chrysotile; commonly Mg₃Si₂O₅(OH)₄, sometimes containing magnetite, chromite, and minor carbonate minerals

Likely copper-bearing rock (identification uncertain)

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

Weathered sandstone slab

Quartz-rich sandstone; exact composition cannot be confirmed from the image

Milky quartz with a dark mica-rich band

Quartz (SiO₂), likely with biotite or another dark mica; host rock uncertain

Malachite-bearing matrix specimen

Malachite, Cu₂CO₃(OH)₂, with likely quartz and iron-stained host rock

Metal Chain (Likely Steel or a Steel Alloy)

Steel (primarily iron and carbon); specific alloy unknown

Unidentifiable Rock Fragment

Likely copper-bearing rock (oxidized copper ore)

Unidentified copper minerals, possibly malachite and cuprite; the image is insufficient for a precise identification

Rounded green-gray pebble, likely altered basalt

Fine-grained mafic volcanic rock; exact identification requires examination

Greenstone / serpentinized rock

Serpentinite, commonly dominated by serpentine-group minerals (antigorite, lizardite, or chrysotile)

Green aventurine (polished stone carving)

Quartz, SiO₂, with green fuchsite mica inclusions (aventurescent quartz)

Weathered pink-and-white quartz-rich pebble

Likely quartz–feldspar-rich granite or pegmatite; exact identification is uncertain from the photograph

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

Undetermined; possible quartz variety citrine (SiO₂)