Indeterminate

Small tumbled blue-green stone, possibly chrysocolla or turquoise

Indeterminate copper-bearing mineral; possible chrysocolla (Cu₂H₂Si₂O₅(OH)₄·nH₂O) or turquoise (CuAl₆(PO₄)₄(OH)₈·4H₂O)

Green glassy mineral specimen, likely nephrite or serpentine

Indeterminate from image; possible nephrite jade (interlocking amphibole, chiefly Ca₂(Mg,Fe)₅Si₈O₂₂(OH)₂) or green serpentine (Mg₃Si₂O₅(OH)₄)

Mixed polished stone and mineral collection

Several small, tumbled specimens; individual species cannot be identified reliably from the image

Unidentified small mineral specimen

Undetermined from the image

Likely bituminous coal

Coal, predominantly carbon-rich organic matter; rank and composition cannot be confirmed from the image

Small pale stone (undetermined)

Unidentified geological specimen; image lacks detail for a reliable mineral or rock identification

Small rough rock fragment

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

Likely white quartz or feldspar fragment

Unidentified pale mineral; quartz (SiO₂) or feldspar are possibilities

Small, pale gray-green rock fragment

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

Blue-gray stone pebble (possibly slag or a weathered rock)

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

Smooth gray pebbles

Unidentified rounded rock fragments; composition cannot be determined from the image

Faceted clear gemstone in a gold-colored ring

Unidentified transparent faceted gem; possibilities include colorless quartz (SiO₂), glass, or diamond (C)

Rounded brown pebble

Unidentified lithic pebble; composition cannot be determined from the image

Small rounded river pebble, possibly fine-grained quartzite

Unidentified silicate pebble; quartzite is a tentative visual identification

Likely polished or naturally smoothed pebble with a pale mineral patch

Undetermined; possibly a dark volcanic rock with a quartz or feldspar inclusion

Likely iron-rich breccia or weathered ironstone

Ironstone breccia; composition cannot be confirmed from the photograph

Likely dyed or painted stone

Unidentified natural rock; vivid purple, orange, and pink coloration appears to be a surface coating or pigment, so the underlying rock cannot be reliably identified from the image.

Rounded banded pebble (likely sandstone or quartzite)

Unidentified silica-rich rock; exact lithology cannot be determined from the image

Calcite-rich limestone (likely crystalline limestone/marble)

Calcite, CaCO₃; likely recrystallized carbonate rock

Vesicular basalt (lava rock)

Vesicular basalt; chiefly plagioclase, pyroxene, and often olivine

Dark rounded pebble, likely hematite-rich ironstone

Possibly hematite (Fe₂O₃) or iron-rich goethite/limonite; the photo alone cannot confirm composition

Rounded quartz-rich pebble

Likely microcrystalline quartz (SiO₂), possibly milky quartz or a pale quartzite fragment

Fossilized Bone Chunk

Permineralized Vertebrate Bone (indeterminant)

Trilobite fossil

Trilobita (exact species indeterminable from the image)

Polished ammonite fossil

Ammonoidea (likely a polished ammonite shell; exact species indeterminable from the image)

Fossil oyster shell

Fossilized bivalve, likely an oyster (family Ostreidae); exact genus and age are indeterminable from the image

Fern fossil in shale

Plant fossil, likely a fern frond impression preserved in fine-grained shale; exact species indeterminable from the image