Uncertain

Polished multicolored stone bead bracelet

Likely dyed or treated agate/jasper, chiefly microcrystalline quartz (SiO₂)

Blue glass-like gemstone, likely synthetic spinel or glass

Uncertain; possibilities include synthetic cobalt-blue spinel (MgAl₂O₄) or cobalt-colored glass

Quartz-rich granite or granitic pegmatite fragment

Granite, chiefly quartz (SiO₂), feldspar, and minor mica

Tumbled green aventurine (likely)

Quartz, SiO₂, with fuchsite or other green inclusions

Likely basalt

Basalt; chiefly plagioclase feldspar, pyroxene, and commonly olivine

Clear quartz crystal (likely)

Quartz, silicon dioxide (SiO₂)

Likely milky quartz with iron-oxide inclusions

Quartz, silicon dioxide (SiO₂)

Purple fluorite specimen

Fluorite (calcium fluoride, CaF₂)

Fossil fish slab

Fossilized fish remains, likely a laminated shale-hosted vertebrate fossil; exact taxon is indeterminate from the image

Tumbled brown stone, likely chert or jasper

Microcrystalline quartz (SiO₂), possibly iron-stained chert/jasper

Uncertain gray-and-white rock fragment

Likely quartz-bearing granite or quartzite; exact identification requires testing

Uncertain green-blue mineral specimens

Possibly chrysocolla or turquoise; exact identification requires testing

Uncertain gray metamorphic rock, likely gneiss or schist

Quartz–feldspar–mica rock; exact identification requires close examination

Uncertain green-brown mineral fragment

Possibly epidote, chlorite, or altered amphibole; exact identification requires testing

Polished agate-like stone (uncertain; possibly a fossil or shell fragment)

Likely microcrystalline quartz (chalcedony), SiO₂; exact identification is limited by the image

Uncertain dark-and-white rock fragment

Likely a mixed lithic specimen, possibly quartz-bearing granite or ore; exact identification is not possible from the photograph

Uncertain dark metamorphic rock, likely schist or slate

Foliated silicate rock; possibly chlorite–mica schist or slate

Uncertain dark metallic mineral specimen

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

Uncertain blue-white mineral fragment

Possibly calcite or quartz; identification is limited because the specimen is tiny and partly translucent

Uncertain small pale mineral fragment

Indeterminate; possibly calcite or a light-colored feldspar fragment

Likely slate

Slate, a fine-grained metamorphic rock composed mainly of mica-group minerals and quartz

Tumbled yellow jasper or silicified rock fragment

Microcrystalline quartz (chalcedony), SiO₂, likely iron-oxide colored

Ruby (rough corundum)

Corundum, aluminum oxide (Al₂O₃), chromium-bearing variety

Polished orbicular jasper (likely ocean jasper)

Jasper, microcrystalline quartz (SiO₂), with iron-oxide and other silicate inclusions

Uncertain dark gray-brown rock fragment

Indeterminate; possibly weathered chert, serpentine, or iron-stained quartzite

Polished orange agate (likely carnelian)

Chalcedony, microcrystalline quartz (SiO₂); orange-red variety commonly called carnelian

Polished black stone, likely obsidian

Volcanic glass; chiefly amorphous SiO₂

Weathered flint or chert fragment

Microcrystalline quartz (SiO₂), commonly called chert or flint

Green beryl (probable emerald-like beryl) in matrix

Beryl, Be₃Al₂Si₆O₁₈; green color from chromium/vanadium (emerald when gem-quality)

Milky quartz

Quartz (silicon dioxide, SiO₂)

Concretion or weathered iron-rich nodule

Likely an ironstone/siderite–goethite concretion; exact identification requires testing

Blue-gray tumbled stone, likely labradorite or blue-gray feldspar

Plagioclase feldspar, possibly labradorite (NaAlSi₃O₈–CaAl₂Si₂O₈)

Iron-rich volcanic rock fragment (likely basalt or weathered scoria)

Basaltic rock; primarily plagioclase feldspar, pyroxene, and iron oxides

Layered dark metamorphic rock, likely slate or phyllite

Slate/phyllite; predominantly fine-grained quartz, mica, and chlorite

Likely tumbled carnelian or orange chalcedony

Microcrystalline quartz, SiO₂ (chalcedony variety)

Likely tumbled pink-and-gray granite or gneiss

Granite: quartz, feldspar, and mica; possibly banded gneiss with similar minerals

Likely weathered quartz or quartz-rich pebble

Quartz, silicon dioxide (SiO₂)

Quartz crystal

Quartz (silicon dioxide, SiO₂), possibly milky quartz

Weathered iron-rich rock, likely laterite or ironstone

Ferruginous laterite/ironstone, composed mainly of goethite (FeO(OH)), hematite (Fe₂O₃), and clay minerals

Likely weathered basalt or basaltic rock

Basalt; primarily plagioclase feldspar, pyroxene, and commonly olivine

Weathered sandstone or quartzite cobble

Quartz-rich sandstone; possibly weakly metamorphosed quartzite (SiO₂-dominant)

Chert or silicified limestone (uncertain)

Microcrystalline quartz (SiO₂), possibly calcitic limestone (CaCO₃)