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)

Unidentified dark pebble

Unknown

Unidentified dark pebble

Unknown

Unknown Dark Stone

Unknown

Likely small iron-rich concretion or weathered mineral fragment

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

Unidentified small rock fragment

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

Mixed mineral and rock collection

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

Small rounded mineral/rock fragment

Indeterminate; possibly quartz-rich stone or feldspar

Likely weathered quartz-bearing rock fragment

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

Unidentified Rock

Unknown

Unidentified small rounded mineral/rock fragment

Indeterminate from image; possibly quartz or chalcedony with iron-oxide staining

Tiny amber-colored crystal fragment

Indeterminate; possibly quartz, feldspar, mica, or a sulfide mineral

Unidentifiable Specimen

Undetermined

Likely quartz-rich pebble

Quartz-bearing granite, granitic gneiss, or quartzite (indeterminate from photo)

Likely weathered quartz-rich rock fragment

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

Likely serpentine or serpentinite

Serpentine-group minerals, chiefly antigorite, lizardite, or chrysotile; approximate formula Mg3Si2O5(OH)4

Small metallic-looking rock fragment

Uncertain; possibly galena-bearing ore or mica-rich schist

Likely serpentinite with a polished dark-green serpentine pebble

Serpentinite; chiefly serpentine-group minerals (Mg₃Si₂O₅(OH)₄), commonly with magnetite and minor chromite/talc

Likely iron sulfide specimen (pyrite or marcasite)

Pyrite, FeS₂; possibly marcasite, also FeS₂

Unidentified polished mineral specimen

Indeterminate; likely a pale feldspar or quartz-bearing material

Small rounded pebble, possibly quartz-rich stone

Indeterminate from image; likely quartz-bearing silicate rock

Unknown White Specimen

Unidentifiable due to blurriness

Rounded gray-brown river pebble

Indeterminate lithic clast; likely weathered sandstone or fine-grained metamorphic rock

Rounded brown river pebble

Indeterminate lithic fragment; possibly weathered sandstone, mudstone, or basalt

Unknown Rock Fragment

Unknown

Rounded river cobble, likely weathered volcanic or metamorphic rock

Indeterminate from photograph; possible basaltic-andesite, rhyolite, or quartz-rich metamorphic lithology

Sandstone or Quartzite with algae

Unknown specific, largely SiO2 with biological growth

Tumbled pale greenish stone, likely serpentine or altered limestone

Probable serpentine-group rock (antigorite/lizardite), possibly serpentinite; identification is visual only

Unknown Rock

Unknown

Greenstone, possibly serpentine or altered basalt

Serpentinite (Mg₃Si₂O₅(OH)₄) or chlorite-epidote altered basalt; identification is uncertain from the image

Serpentinite (likely)

Serpentinite; chiefly serpentine-group minerals, Mg₃Si₂O₅(OH)₄, commonly with magnetite and minor carbonates

Polished amber-colored stone, possibly chert or jasper

Uncertain from image; likely microcrystalline quartz (SiO₂) if chert/jasper

Unidentified polished stone fragments

Indeterminate; likely mixed lapidary specimens, possibly jasper, agate, or quartz-bearing rock

Unknown Rock

Unknown

Unknown Tumbled Stone

Unknown (Too Blurry)

Unknown white fragment

Unknown

Likely weathered river pebble

Indeterminate lithology; possibly fine-grained sandstone, siltstone, or chert

Pink halite (rock salt)

Halite — sodium chloride (NaCl), likely colored by impurities or inclusions

Rounded greenstone pebble

Likely serpentinite or chlorite-rich metamorphic rock; exact identification requires testing

Dark green-black stone, likely serpentinite

Serpentinite; chiefly antigorite/lizardite/chrysotile group minerals, commonly with magnetite