Undetermined

Iron-rich meteorite candidate

Undetermined stony-iron or iron meteorite; possible weathered iron meteorite

Dark, veined metamorphic rock (possibly gneiss or schist)

Undetermined from the photograph; likely a foliated, quartz-veined metamorphic rock

Fine-grained crystalline rock fragment, possibly limestone or marble

Undetermined carbonate rock; likely calcite-rich limestone or marble (CaCO₃)

Green faceted gemstone earrings, likely synthetic emerald-colored glass or cubic zirconia

Undetermined; possible glass (amorphous silicate) or synthetic cubic zirconia (ZrO₂)

Tumbled green stone, possibly amazonite

Undetermined from the image; amazonite is green microcline feldspar, KAlSi₃O₈

Iron-stained quartz vein in weathered host rock

Quartz (SiO₂) with iron-oxide/hydroxide staining; host rock undetermined

Small brown mineral or rock fragment

Undetermined; the image does not show enough diagnostic detail for reliable identification

Fossil oyster shell

Oyster shell, composed primarily of calcite (CaCO₃); exact species undetermined

Fine-grained, foliated rock (possibly slate or phyllite)

Undetermined; likely slate or phyllite, composed mainly of quartz, mica, and chlorite

Black tumbled stone, possibly obsidian

Undetermined; appearance may resemble obsidian (volcanic glass, SiO₂-rich)

Tumbled orange-brown stone, possibly quartzite or jasper

Undetermined; likely iron-stained quartz-rich rock (quartz, SiO₂)

Polished brown stone, possibly tiger’s eye

Undetermined; tiger’s eye is quartz (SiO₂) with fibrous crocidolite-derived inclusions

Likely metallic meteorite fragment

Undetermined iron meteorite, possibly an iron–nickel alloy (kamacite/taenite)

Iron-rich meteorite candidate

Undetermined Fe–Ni meteorite; possible ordinary chondrite or iron meteorite

Iron-rich meteorite candidate

Undetermined Fe–Ni meteorite, possibly an ordinary chondrite or iron meteorite

Small dark mineral or rock fragment (not identifiable from the image)

Undetermined; the specimen is too small and lacks visible diagnostic features for a reliable identification.

Large rounded boulder, likely foliated metamorphic rock (possibly gneiss or schist)

Undetermined foliated silicate rock; mineral species cannot be confirmed from the photograph

Dark gray rock, possibly basalt or slate

Undetermined from image; likely fine-grained basalt (mafic volcanic rock)

Small rough mineral or rock fragment (not identifiable from the image)

Undetermined; the specimen is too small and lacks diagnostic visible features for a reliable identification

Small gray rock fragment

Undetermined; likely a common silicate-rich stone or concrete/road aggregate fragment

Likely quartz-bearing rock fragment

Undetermined; possibly a coarse-grained granitoid (quartz and feldspar with dark mica or amphibole)

Faceted clear gemstone, likely glass or cubic zirconia

Undetermined; could be synthetic cubic zirconia (ZrO₂) or cut glass (silica-based)

Rounded gray-green rock (likely andesite or basalt cobble)

Undetermined fine-grained volcanic rock; composition cannot be confirmed from the image

Small tumbled dark stone, possibly sodalite or blue-gray jasper

Undetermined from the image; visual appearance is consistent with sodalite-bearing rock or jasper

Unidentified smooth stones

Undetermined from the image; the specimens may be water-worn pebbles of different compositions.

Polished dark-blue cabochon, possibly blue sodalite

Undetermined; blue sodalite is a possible identification (Na₈Al₆Si₆O₂₄Cl₂)

Blue cabochon gemstone, likely synthetic spinel or glass

Undetermined; possible synthetic cobalt-blue spinel (MgAl₂O₄) or colored glass

Black drusy mineral coating, possibly hematite or manganese oxide

Undetermined; likely microcrystalline hematite (Fe₂O₃) or manganese oxides such as pyrolusite (MnO₂)

Iron-rich meteorite candidate

Undetermined; possible stony-iron or iron meteorite, commonly kamacite–taenite alloy

Small water-worn pebble, likely quartz-rich rock

Undetermined rounded lithic pebble; exact composition cannot be identified from the image

Small pale-green tumbled stone, possibly serpentine or aventurine

Undetermined from the image; possible serpentine-group minerals or quartz with fuchsite (aventurine)

Black-and-white banded pebble (likely gneiss or migmatite)

Undetermined banded metamorphic rock; mineral composition cannot be confirmed from the image

Rounded, weathered rock (likely quartz-rich granite or gneiss)

Undetermined quartz–feldspar-rich rock; precise identification requires closer examination

Dark, coarse-grained rock (possibly diorite or amphibolite)

Undetermined; likely a mafic to intermediate rock containing plagioclase and dark amphibole or pyroxene

Small, pale gray-green rock fragment

Undetermined fine-grained silicate rock; exact identification is not possible from the image

Unidentified rough rock fragment

Undetermined; the image does not show enough diagnostic detail for a reliable rock identification

Rounded gray pebble, likely granite or a similar crystalline rock

Undetermined; possibly granitic rock composed mainly of quartz, feldspar, and dark mica

Unidentified mineral specimen, possibly quartz-bearing rock

Undetermined from the photograph; no diagnostic mineral or rock name can be assigned reliably.

Weathered metamorphic outcrop, likely schist or gneiss

Undetermined foliated metamorphic rock; mineral composition cannot be confirmed from the photograph

Small brown mineral or rock fragment (not identifiable from the image)

Undetermined; the specimen is too small and lacks visible diagnostic features for reliable identification

Small brown mineral/rock fragment (unidentified)

Undetermined from the image; no reliable species identification is possible from appearance alone.

Tumbled dark-green stone, possibly serpentine

Undetermined; serpentine-group rock (predominantly serpentine minerals) is a tentative visual identification