Indeterminate

Fossilized bone, likely a large mammal limb bone

Mineralized cortical bone; exact taxon indeterminate from the image

Tumbled dark pebble

Indeterminate; likely basalt or fine-grained dark metamorphic rock

Small pale rock fragment

Indeterminate; possibly quartz, calcite, or a weathered feldspar-rich fragment

Weathered gray-green pebble

Indeterminate; possibly altered basalt, serpentinite, or a greenish metamorphic rock

Weathered greenish rock fragment

Indeterminate; possibly epidote- or chlorite-bearing altered silicate rock

Weathered quartz-rich rock, possibly granite or quartzite

Indeterminate; likely quartz–feldspar aggregate, possibly granitic gneiss

Tumbled light-colored stone, possibly quartzite or limestone

Indeterminate; likely quartzite (mostly SiO₂) or calcitic limestone (CaCO₃)

Tumbled beige stone, possibly jasper or limestone

Indeterminate; likely microcrystalline quartz (jasper) or calcium-carbonate limestone

Small dark mineral/rock fragment

Indeterminate; possibly magnetite-bearing basalt or iron-rich slag

Likely dark rounded pebbles

Indeterminate; possibly basalt or a dark mafic mineral such as hornblende/biotite

Fossil shell fragment

Indeterminate fossilized mollusk shell; species cannot be identified from the image

Fossil-bearing rock, possibly with a fossilized shell or coralline specimen

Indeterminate fossil in sedimentary matrix; precise identification is not possible from the image

Water-worn blue-gray pebble, likely slate or fine-grained metamorphic rock

Indeterminate from appearance; possibly slate (low-grade metamorphosed shale)

Probable fossil tooth fragment

Indeterminate fossilized vertebrate tooth; species cannot be identified from this image

Rounded gray-green stone, likely fine-grained sandstone or siltstone

Indeterminate clastic sedimentary rock; exact identification requires closer examination

Rounded iron-rich river pebble, likely sandstone or ironstone

Indeterminate ferruginous sandstone/ironstone; exact identification requires closer examination

Unidentified dark stone fragment

Indeterminate from the image; possibly a dark mafic rock or black mineral

Blue quartz-rich rock, possibly sodalite-bearing rock

Indeterminate blue silicate specimen; identification cannot be confirmed from the image

Tumbled greenish pebble, possibly serpentine

Indeterminate green metamorphic rock; serpentine-group minerals are a plausible match

Possible blue topaz or glassy blue mineral fragment

Indeterminate from image; possibly topaz (Al₂SiO₄(F,OH)₂)

Weathered river pebble (likely iron-stained rock)

Indeterminate from the image; possibly iron-oxide-stained quartzite or sandstone

Fossil plant impression slab

Fossilized plant compression/impression; exact taxon indeterminate from the image

Uncertain pale mineral/rock fragment

Indeterminate; possibly calcite-rich material or a light-colored carbonate rock

Fossil shell fragment

Likely fossilized bivalve or brachiopod; exact taxon indeterminate from the image

Likely quartz-rich pebble or weathered limestone fragment

Indeterminate; possibly microcrystalline quartz (SiO₂) or calcite-rich limestone (CaCO₃)

Small translucent tumbled crystal or gemstone

Indeterminate; likely quartz (SiO₂), possibly citrine or glass-like chalcedony

Tumbled quartz-rich rock, possibly calcite or sandstone

Indeterminate from photograph; likely microcrystalline quartz (SiO₂) or calcite (CaCO₃)

Rounded river pebble (likely fine-grained sandstone or quartzite)

Indeterminate from image; likely quartz-rich sandstone, possibly quartzite

Weathered iron-rich rock (possibly ironstone)

Indeterminate ferruginous rock; likely iron-oxide-cemented sandstone or ironstone

Small rounded pebble; specific identification uncertain

Indeterminate lithic fragment; mineral composition cannot be determined from the image

Rounded pebble, likely quartz-rich river stone

Indeterminate quartz-feldspar-rich lithology; possibly weathered granite or quartzite

Small unidentified mineral specimen

Indeterminate from image; possibly a quartz-family crystal or sulfide mineral

Rounded river stone (likely iron-stained sandstone or siltstone)

Indeterminate ferruginous sandstone/siltstone; composition cannot be confirmed from the image

Fossil gastropod shell

Fossilized or mineral-replaced gastropod (class Gastropoda), exact genus indeterminate

Likely weathered quartz-rich rock fragment

Indeterminate; possibly quartz-bearing sandstone or chert with iron-oxide staining

Weathered quartz-rich rock, possibly granite or quartzite

Indeterminate; likely quartz-feldspar aggregate, potentially granitic or quartzitic material

Likely quartz-rich stone or pale feldspar fragment

Indeterminate; possibly quartz (SiO₂) or feldspar (KAlSi₃O₈–NaAlSi₃O₈)

Fossilized coral or stromatoporoid

Calcareous coral, likely an indeterminate fossil colonial coral (phylum Cnidaria)

Unidentified brown rock fragment

Indeterminate from image; likely a weathered iron-rich lithic fragment

Tumbled beach pebble (likely quartz-rich sandstone or chert)

Indeterminate lithic clast; likely quartz (SiO₂)-rich sandstone/chert

Small conical fossil shell fragment

Indeterminate gastropod or scaphopod shell; likely calcium carbonate (aragonite/calcite)

Fossil fish impression or partial fish fossil

Indeterminate fossilized fish; likely compressed vertebrate remains in sedimentary rock