Indeterminate

Fossilized bone, possibly a large limb bone

Fossil bone composed chiefly of bioapatite (hydroxyapatite); exact animal and identification are indeterminate from the photo

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

Weathered iron-rich rock, possibly limonite-bearing basalt or ironstone

Indeterminate; likely Fe-oxide/hydroxide–stained basalt or ferruginous ironstone (goethite/limonite-rich)

Fossilized tooth or bone fragment

Indeterminate fossil; possibly a small fossil tooth or mineralized bone, exact identification requires microscopy

Fossilized shell or coral fragment

Indeterminate marine mollusk or colonial coral fossil; likely calcite/aragonite replaced by calcite (CaCO₃)

Fossil-bearing limestone or sandstone slab

Indeterminate carbonate/clastic sedimentary rock; visible structures may be fossil fragments or bedding features

Gold-colored gemstone ring, likely citrine or glass imitation

Indeterminate from image; possible quartz (SiO₂) or yellow glass set in gold-colored metal

Breccia (likely volcanic or impact breccia)

Polymictic breccia; clasts in a fine-grained silicate matrix, exact mineralogy indeterminate from image

Uncertain small stone; possibly weathered quartz-bearing rock

Indeterminate from image; candidate materials include quartz-rich pebble or altered silicate rock

Likely fossil tooth or tooth fragment

Indeterminate fossilized vertebrate tooth; possibly shark or marine reptile, identification uncertain from the image

Beach-worn fossil bone or coral fragment

Indeterminate biogenic calcium-carbonate material; likely fossilized bone (hydroxyapatite) or coral (calcite/aragonite)

Weathered sandstone or quartz-rich sedimentary rock

Indeterminate sandstone; commonly quartz–feldspar framework grains cemented by silica, calcite, or iron oxides

Fossil shell fragment

Indeterminate mollusk shell; likely gastropod or bivalve, composed mainly of calcium carbonate (aragonite/calcite)

Rounded river pebble, likely weathered limestone or sandstone

Indeterminate carbonate or siliciclastic sedimentary rock; likely limestone (calcite-rich, CaCO₃) or lithic sandstone

Reddish-brown iron-rich rock, possibly weathered basalt or laterite

Indeterminate; likely iron-oxide-stained basalt (plagioclase–pyroxene) or ferruginous laterite (goethite/hematite)

Small rounded pebble, likely sandstone or weathered limestone

Indeterminate clastic carbonate/siliciclastic pebble; mineral composition appears dominated by quartz, feldspar, and/or calcite

Likely weathered brown stone, possibly iron-rich sandstone or chert

Indeterminate from image; possible ferruginous sandstone (quartz + iron oxides) or iron-rich chert

Assorted small mineral and rock specimens

Indeterminate from the photograph; specimens may include turquoise-colored material, quartz/chalcedony, and assorted rocks

Mixed rock specimens; likely breccia and quartz-bearing rocks

Indeterminate from the image; the brown, angular clasts may be breccia, with white quartz or calcite pieces nearby

Gemstone ring (stones not reliably identifiable from the image)

Likely faceted yellow stones and clear stones set in a metal band; species and treatments are indeterminate visually

Quartz-veined metamorphic rock, likely quartzite or schist

Quartz-rich metamorphic rock with a milky-quartz vein; exact host rock is indeterminate from the photo

Likely polished black stone; possibly basalt or black chert

Indeterminate from the blurred image; candidates include basalt (mafic volcanic rock) or microcrystalline quartz (chert)

Tumbled dark reddish-brown stone, possibly garnet or jasper

Indeterminate; likely almandine garnet (Fe₃Al₂Si₃O₁₂) or iron-rich jasper (microcrystalline SiO₂)

Tumbled blue-green stone, possibly chrysocolla or serpentine

Indeterminate from photograph; likely chrysocolla (hydrated copper silicate) or green serpentine (serpentine-group minerals)

Blue glass-like bead or gemstone keychain ornament

Indeterminate; likely cobalt-blue glass or synthetic blue spinel, not identifiable as a natural mineral from the image

Weathered quartz-bearing feldspar rock, possibly granite or pegmatite

Indeterminate granitic/pegmatitic aggregate; chiefly quartz (SiO₂) and feldspar, with possible mica or iron-oxide staining

Fossil gastropod shell

Spiral marine gastropod fossil; likely a small ammonite-like or gastropod shell, exact taxon indeterminate

Weathered tan mineral/rock fragment

Indeterminate from image; possibly iron-stained quartz, feldspar-rich rock, or limonite-bearing material

Weathered rock fragment, possibly granite or metamorphic stone

Indeterminate; likely quartz–feldspar–mica aggregate (granite-like), but image resolution prevents reliable identification

Polished blue-black cabochon, likely blue obsidian or dyed glass-like stone

Indeterminate from image; possible natural obsidian (volcanic glass), commonly SiO₂-rich rhyolitic glass

Unidentified dark reddish-brown rock or mineral specimen

Indeterminate from the blurred image; possibly iron-stained quartz, jasper, or a metallic sulfide-bearing rock

Tumbled green stone, likely serpentine or aventurine

Indeterminate; possible serpentine-group mineral (Mg₃Si₂O₅(OH)₄) or green quartzite/aventurine (SiO₂)

Possible weathered iron-rich rock or breccia

Indeterminate; likely iron-oxide-stained silicate rock, possibly basaltic breccia or limonite-bearing material

Likely weathered sandstone or iron-stained limestone pebble

Indeterminate clastic carbonate/siliciclastic rock; mineral composition likely quartz, feldspar, and/or calcite with iron oxides

Beaded gemstone bracelet

Indeterminate; likely small polished mineral beads, possibly turquoise or dyed stone, with metal and glass components

Dark brown mineral fragments, possibly garnet or iron-rich rock

Indeterminate from image; possible almandine garnet (Fe₃Al₂Si₃O₁₂) or limonite-rich material

Fossil shark teeth

Likely fossilized shark teeth; exact species indeterminate from the image, possibly Carcharhiniformes or related taxa

Likely weathered quartz-bearing rock fragment

Indeterminate; appears to contain quartz (SiO₂) with iron-oxide staining, possibly from quartzite, granite, or pegmatite

Tumbled sea glass or pale-green quartz pebble

Indeterminate from image; possibly quartz (SiO₂), but the smooth translucent piece may be man-made glass

Likely basalt or other fine-grained volcanic rock

Indeterminate dark mafic volcanic rock; commonly basalt, composed mainly of plagioclase and pyroxene, often with olivine

Mixed rock fragments, likely iron-stained quartz-rich material

Indeterminate mixture; visible pale fragments may be quartz or feldspar, with iron-oxide staining (goethite/limonite)

Unidentified small mineral specimen

Indeterminate from the photograph; it may be a light-colored quartz- or feldspar-rich rock with a dark mineral inclusion.