Unknown (Likely Sedimentary Or Metamorphic)

Iron-stained weathered rock

Unknown

Unidentified Rock Fragment

Unknown

Polished Stone Pendant (Identity Unclear)

Unknown (Possibly Jasper/Agate/Quartz mixture)

Blue-gray stone fragment, possibly slate or fine-grained basalt

Undetermined; appearance is consistent with slate (fine-grained metamorphosed mudstone), but the image is insufficient for reliable identification.

Tumbled banded gneiss

Gneiss, a foliated metamorphic rock; exact mineral composition cannot be determined from the image

Small rough mineral fragment, possibly quartz or feldspar

Unidentified silicate mineral; image is insufficient for a reliable species identification

Drill-core rock, likely foliated metamorphic rock

Indeterminate from the photograph; possibly slate, phyllite, or schist

Weathered, foliated metamorphic rock (likely schist or phyllite)

Probably mica-rich schist or phyllite; exact identification requires close examination of its grains and foliation

Foliated metamorphic rock (likely mica schist)

Mica schist, typically composed of quartz and mica (muscovite and/or biotite)

Unidentified dark pebble

Unknown

Unidentified dark pebble

Unknown

Unidentified small rock fragment

Likely quartz-rich material; exact identification is indeterminate from the image

Likely mica schist

Mica-rich schist, likely muscovite–biotite schist; exact identification requires examination

Unknown Dark Stone

Unknown

Weathered banded gneiss

Foliated quartz–feldspar-rich gneiss; exact mineral identification requires closer examination

Small rounded mineral/rock fragment

Indeterminate; possibly quartz-rich stone or feldspar

Mixed mineral and rock collection

Predominantly quartz varieties, including amethyst, plus likely calcite, feldspar, mica, and miscellaneous polished stones

Waterworn pebble, possibly iron-rich basalt or river stone

Unidentified lithic clast; composition cannot be determined reliably from the image

Rough garnet-bearing rock, likely garnet-mica schist

Garnet (commonly almandine, Fe₃Al₂(SiO₄)₃) in a mica- and quartz-rich metamorphic matrix; exact identification is uncertain from the photo

Painted pebble, likely a smooth river stone

Unidentified fine-grained natural rock; exact lithology cannot be determined from the image

Small rounded pebble; specific identification uncertain

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

Rounded gray-green beach cobble

Unidentified lithic cobble; exact rock type cannot be determined from the image

Likely small iron-rich concretion or weathered mineral fragment

Indeterminate; possibly limonite/goethite-bearing material with quartz or feldspar

Quartz-bearing mica schist

Mica schist, likely quartz–muscovite/biotite schist

Weathered pebble, possibly limestone

Unidentified carbonate or silicate rock; the image is insufficient for a definitive identification

Small, rounded stone pebble

Unidentified natural pebble; the image does not show enough detail to identify its mineral or rock type

Pistachio-green and dark mineral-bearing rock, possibly serpentine with dark inclusions

Undetermined; the image is insufficient for reliable species-level identification

Likely weathered quartz-bearing rock fragment

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

Weathered yellow-brown rock pebble

Undetermined; possibly iron-oxide-stained sandstone or mudstone

Mixed stream-worn rocks, likely including quartz-rich gravel

Composition indeterminate; visible material may include quartz (SiO₂) and assorted lithic fragments

Green-gray stone pebble (not reliably identifiable from the image)

Undetermined; possibly a fine-grained sedimentary rock such as mudstone or siltstone

Mixed collection of small rounded pebbles

Unidentified river- or beach-worn lithic clasts; individual rock types cannot be determined confidently from the image

Small rounded pebble (rock type indeterminate)

Unidentified lithic pebble; specific composition cannot be determined 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

Small brown rock fragment, possibly iron-stained quartz or chert

Unidentifiable from the photograph; potentially quartz (SiO₂) or microcrystalline silica (chalcedony/chert)

Banded gneiss

Quartz–feldspar–mica gneiss; exact mineral composition cannot be confirmed from the image

Weathered stone pebble (exact rock type indeterminate)

Unidentified fine-grained rock; composition cannot be determined from the image

Smooth river pebble (exact rock type indeterminate)

Unidentified rounded lithic clast; composition cannot be determined from the photograph

Unidentifiable Specimen

Undetermined

Unidentified Rock

Unknown

Likely clear quartz fragment

Quartz (silicon dioxide, SiO₂)

Rounded brown pebble (rock type undetermined)

Unidentified, iron-stained lithic pebble; composition cannot be determined from the photograph