Indeterminate

Weathered sandstone or limestone fragment

Indeterminate clastic carbonate/siliciclastic rock; likely quartz-rich sandstone or porous limestone

Rounded river cobble, likely weathered sandstone or quartz-rich metasandstone

Indeterminate sandstone; commonly quartz (SiO₂) with feldspar, lithic grains, and iron-oxide cement

Greenish rough stone, possibly serpentine or soapstone

Indeterminate from the image; possible serpentinite (serpentine-group minerals) or talc-rich soapstone

Weathered brown rock, likely iron-rich sandstone or laterite

Indeterminate; probable ferruginous sandstone/ironstone, composed mainly of quartz with iron-oxide cement

Fossilized shell or shell fragment

Indeterminate mollusk shell; likely fossilized bivalve or gastropod, composed mainly of calcite/aragonite

Polished banded stone, likely labradorite or banded gabbro

Indeterminate from image; possibly plagioclase-rich gabbro/anorthosite or labradorite-bearing rock

Rounded brown river pebble

Indeterminate lithic fragment; likely weathered sandstone, mudstone, or fine-grained volcanic rock

Fossilized bone or tooth fragment

Indeterminate vertebrate fossil; likely permineralized bone, possibly a large mammal or marine vertebrate

Unidentified green-gray mineral/rock fragment

Indeterminate from image; possible serpentine-bearing rock or chrysocolla/azurite-bearing material

Small polished amber or brown gemstone

Indeterminate from image; possibly amber (fossilized plant resin) or brown chalcedony/quartz

Rounded quartz-rich river cobble (probable rhyolite/granite-derived stone)

Indeterminate felsic igneous cobble; likely quartz–feldspar aggregate with minor iron oxides

Faceted gemstone pendant, likely quartz or citrine

Indeterminate from photograph; likely quartz (SiO₂), possibly yellow citrine or treated quartz

Unidentified polished stone or mineral specimen

Indeterminate from the blurred photograph; possibly a polished pale chalcedony, quartz, or feldspar piece

Weathered iron-stained quartz-rich rock, possibly rhyolite or quartzite

Indeterminate silica-rich rock; likely quartz (SiO₂) with iron oxides and clay alteration

Unidentified fine mineral/rock powder

Indeterminate from image; possibly crushed quartz-rich sand or finely milled rock

Fossiliferous pebble, possibly a crinoid or shell fragment

Indeterminate bioclast in a dark sedimentary matrix; likely carbonate fossil material (calcite, CaCO₃)

Polished black stone, likely basalt or black jasper

Indeterminate; possible fine-grained basalt (plagioclase–pyroxene) or black jasper/microcrystalline quartz

Fossilized coral fragment

Fossil coral, commonly colonial scleractinian coral (order Scleractinia); exact genus indeterminate

Uncertain small mineral specimen, possibly fluorite or quartz-bearing rock

Indeterminate; pale green/purple material may include fluorite (CaF₂) or quartz (SiO₂)

Fossil bivalve shell

Likely a fossilized oyster or other marine bivalve; exact genus is indeterminate from the image

Weathered iron-stained stone, likely graywacke or altered sandstone

Indeterminate lithic fragment; probable quartz-rich sandstone/graywacke with iron-oxide staining

Rounded sandstone or quartz-rich river cobble

Indeterminate lithic sandstone; chiefly quartz (SiO₂) with feldspar and iron-oxide/calcite cement

Fossil bone fragment, likely vertebrate limb or rib bone

Fossilized bone (apatite-rich hydroxyapatite, Ca₅(PO₄)₃OH); exact taxon indeterminate

Blue glassy mineral fragment, possibly kyanite or blue quartz

Indeterminate from image; candidates include kyanite (Al₂SiO₅) or blue quartz (SiO₂)

Fossil bone or tooth fragment

Indeterminate fossilized vertebrate bone/tooth; taxonomic identification is not possible from this blurred image

Weathered golden-brown mineral/rock fragment

Indeterminate from image; possibly iron-stained quartz, feldspar, or a sulfide-bearing rock

Weathered quartz-bearing rock, possibly iron-stained quartzite or granitic pegmatite

Indeterminate; likely quartz-rich silicate rock with iron-oxide staining (SiO₂-dominant)

Rounded quartz-veined pebble

Likely quartz-veined metamorphic rock; exact host rock is indeterminate from the image

Fossilized bivalve or brachiopod shell

Mineralized carbonate shell, commonly calcite (CaCO₃); exact taxon indeterminate from image

Likely polished black-and-white stone fragment

Indeterminate from image; possibly tourmalinated quartz, black-and-white jasper, or coated stone

Fossiliferous Limestone

Sedimentary rock containing Indeterminate Fossil remains (likely Crinoid stem or Bryozoan fragment)

Fossilized shell or coral fragment

Likely silicified or calcitic marine invertebrate fossil; exact taxon indeterminate from the image

Likely weathered quartz-bearing rock fragment

Indeterminate granitic or quartz-rich silicate rock; chiefly quartz (SiO₂), possibly feldspar

Weathered brown stone, possibly basalt or iron-rich sedimentary rock

Indeterminate from photograph; likely fine-grained mafic rock (basalt) or ferruginous sandstone

Small weathered stone, possibly quartz-rich granite or feldspar

Indeterminate granitoid fragment; likely quartz (SiO₂) and feldspar, with minor mica or iron oxides

Fossil tooth, possibly shark tooth

Indeterminate fossilized vertebrate tooth; likely a shark tooth (possibly *Carcharhinus* or related genus)

Smooth river pebble

Indeterminate lithology; likely fine-grained quartz-rich sandstone, siltstone, or weathered chert

Tumbled dark blue-green stone, likely labradorite or indigo gabbro

Indeterminate; possible feldspar-rich labradorite (plagioclase, NaAlSi₃O₈–CaAl₂Si₂O₈)

Green cabochon gemstone, likely aventurine or dyed chalcedony

Indeterminate from image; possible quartz variety (SiO₂), including aventurine quartz or chalcedony

Possible fossilized ammonite or concretion

Indeterminate fossil specimen; possibly an ammonoid mold/cast in iron-rich sedimentary rock

Fossilized bone or tooth fragment (indeterminate vertebrate fossil)

Mineralized vertebrate skeletal material; commonly apatite, Ca₅(PO₄)₃(F,Cl,OH), partly replaced by silica or calcite

Weathered copper-bearing rock, possibly chrysocolla-bearing quartz or host rock

Indeterminate from the photo; possible chrysocolla (hydrated copper silicate) with quartz or other host minerals