Uncertain

Fossilized bivalve shell fragment

Calcitic mollusk shell, commonly Bivalvia; exact genus cannot be determined from the image

Fossilized tooth, likely mammoth or mastodon molar fragment

Proboscidean molar enamel and dentin; exact species requires expert examination

Rounded volcanic pebble, likely andesite or basalt

Fine-grained andesite–basalt; chiefly plagioclase feldspar and pyroxene, with possible iron oxides

Galena (likely)

Galena, lead sulfide (PbS)

Likely gypsum (selenite/alabaster)

Gypsum, CaSO₄·2H₂O

Polished red jasper

Jasper, an opaque microcrystalline variety of quartz (SiO₂), colored mainly by iron oxides

Greenstone (likely chlorite-rich metamorphic rock)

Chlorite-rich greenschist; exact identification requires testing

Hematite (iron oxide)

Hematite, α-Fe₂O₃

Weathered limestone

Calcite-rich limestone, chiefly calcium carbonate (CaCO₃)

Polished amber cabochon pendant

Amber (fossilized plant resin), chiefly polymerized succinite; approximate formula C10H16O

Likely jade (greenstone)

Possibly nephrite jade, a compact tremolite–actinolite amphibole aggregate; the photo is insufficient to distinguish it from other green minerals.

Fossil bivalve shell

Bivalvia; shell composed mainly of calcium carbonate (typically aragonite and/or calcite)

Unidentified metallic-looking mineral fragment

Indeterminate; possible galena, magnetite, or metal-rich sulfide/ore fragment

Likely granite

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

Faceted yellow-brown gemstone ring

Likely citrine (quartz, SiO₂); the image alone cannot confirm the stone or any treatments.

Polished dark stone, likely basalt or fine-grained mafic rock

Basalt (approximately; commonly plagioclase, pyroxene, and minor olivine/magnetite)

Weathered limestone or calcareous sandstone

Calcite-rich carbonate rock, likely limestone (CaCO₃)

Weathered quartz-rich rock fragment

Indeterminate; likely altered granite or quartz-bearing pegmatite

Rounded granite cobble

Granite, a coarse-grained felsic intrusive igneous rock composed mainly of quartz, potassium feldspar, plagioclase, and minor mica or amphibole

Likely galena (lead sulfide)

Galena, PbS

Yellow agate beads

Agate, a banded microcrystalline variety of quartz (SiO₂), likely heat-treated or dyed to enhance the yellow color

Breccia

Lithic breccia (angular rock fragments cemented in a finer matrix)

Blue-green amphibole-bearing rock (possibly actinolite schist)

Likely actinolite-rich rock; actinolite, Ca₂(Mg,Fe)₅Si₈O₂₂(OH)₂

Blue-green copper mineral (possibly chrysocolla or turquoise)

Undetermined from the image; chrysocolla is a hydrated copper silicate, Cu₂H₂O₅Si, while turquoise is CuAl₆(PO₄)₄(OH)₈·4H₂O

Rounded quartz-rich pebble

Likely quartzite (metamorphosed quartz sandstone), composition predominantly quartz (SiO₂)

Watermelon tourmaline in matrix

Elbaite tourmaline, Na(Li₁.₅Al₁.₅)Al₆Si₆O₁₈(BO₃)₃(OH)₃(OH)

Brown jasper pebble

Microcrystalline quartz (SiO₂), commonly iron-oxide stained

Reddish-brown rounded pebble, likely iron-stained sandstone or chert

Probable quartz-rich sandstone (SiO₂), possibly ferruginous chert; exact identification requires testing

Quartz crystal fragment in weathered host rock

Quartz (SiO₂), possibly in a feldspathic or iron-stained matrix

Milky quartz

Quartz (silicon dioxide, SiO₂)

Tiger’s-eye (likely a polished or carved tiger’s-eye piece)

Quartz variety with fibrous crocidolite-replacement structure; SiO₂

Amethyst pendant

Amethyst, purple variety of quartz (SiO₂)

Tumbled stones, likely jasper or agate

Likely microcrystalline quartz (SiO₂), varieties such as jasper or agate; exact identification is not possible from the image

Green mica schist (probable)

Mica-rich schist, likely dominated by muscovite or chlorite with quartz

Small cream-colored pebble, likely quartzite

Quartzite, composed mainly of quartz (SiO₂)

Small pebble, likely limestone

Unidentified carbonate pebble, possibly micritic limestone (calcite, CaCO₃)

Amber (fossil resin)

Fossilized plant resin; organic material, not a mineral

Yellow calcite

Calcite, CaCO₃

Likely dark green jasper or serpentinite pebble

Undetermined fine-grained rock; possible serpentine-group mineral (approx. Mg₃Si₂O₅(OH)₄) or jasper (microcrystalline SiO₂)

Weathered quartz-rich rock, possibly granite or quartzite

Indeterminate; likely quartz–feldspar aggregate, potentially granitic, or recrystallized quartzite

Tumbled dark green stone, likely serpentine or greenstone

Serpentine-group minerals, chiefly antigorite/lizardite; possibly chlorite-rich greenstone

Banded ironstone (likely)

Iron-rich, silica-bearing rock; possibly a fragment of banded iron formation (BIF)