Undetermined

Small dark pebble, possibly basalt or iron-rich stone

Undetermined; image alone cannot confirm composition

Weathered, rounded rock (likely metamorphic or igneous)

Undetermined; possibly a quartz- and feldspar-bearing rock

Small cylindrical mineral/stone fragment

Undetermined; the image is insufficient for reliable mineral identification

Polished dark stone, possibly black tourmaline or a dark pebble

Undetermined; image lacks detail for reliable identification

Blue-gray rough mineral specimen, possibly kyanite

Undetermined; kyanite is a possible identification (Al₂SiO₅)

Unidentified gray rock fragment

Undetermined; the image is too blurred for reliable identification

Unidentified pink-and-gray mineral or rock specimen

Undetermined; the image is too blurry for reliable identification

Small rough mineral/rock specimen (not confidently identifiable)

Undetermined; image detail is insufficient for a reliable identification

Blue-green rough mineral specimen (identity uncertain)

Undetermined; the image is insufficient for a reliable mineral identification

Small pale stone (unidentified)

Undetermined; image detail is insufficient for reliable identification

Dark polished stone, possibly a pebble

Undetermined; image lacks detail for reliable identification

Quartz vein in host rock

Quartz (SiO₂) in an undetermined mineralized host rock

Small polished translucent stone, possibly chalcedony or quartz

Undetermined; likely microcrystalline silica (SiO₂), such as chalcedony

Polished yellow-brown stone, possibly jasper

Undetermined; potentially microcrystalline quartz (SiO₂) jasper

Dark, fine-grained rock fragment; possibly basalt

Undetermined; basalt is a tentative identification from the image

Likely banded metamorphic pebble (possibly gneiss)

Gneiss, composition undetermined; visual identification is tentative

Gemstone ring (stone appears pale yellow, possibly citrine or glass imitation)

Undetermined; possible quartz variety citrine (SiO₂)

Tumbled turquoise-colored stone pendant

Undetermined; possibly dyed howlite or magnesite, or turquoise

Small tan rock fragment

Unidentifiable lithic fragment; mineral composition undetermined

Green cabochon, likely dyed or imitation material

Undetermined; the image is insufficient to identify a mineral species

Small yellow-brown stone, possibly iron-stained quartz or chert

Undetermined; visual evidence is insufficient for a confident identification

Fossil bone fragment

Fossilized vertebrate bone; exact taxon undetermined

Likely black beach pebble

Undetermined; possibly basalt, chert, or dark slate

Unidentified gray mineral/rock fragment

Indeterminate from image; possibly quartz-rich material or mica-bearing schist

Tumbled blue glassy mineral specimen, possibly blue calcite or dyed quartz

Uncertain from image; likely calcite (CaCO₃) or dyed microcrystalline quartz (SiO₂)

Polished pietersite-like brecciated jasper

Silicified chalcedony/jasper aggregate, primarily SiO₂; exact material uncertain from image

Small pale stone fragment (undetermined)

Unidentified; the image lacks diagnostic detail for a reliable identification

Fossilized bone or bone fragment

Indeterminate fossil bone; mineralized apatite (hydroxyapatite), commonly Ca₅(PO₄)₃(OH)

Fine-grained brown sand or weathered soil

Unconsolidated siliciclastic sediment, likely quartz-rich sand (SiO₂) mixed with iron-oxide-coated grains

Fossilized wood or bone fragment

Indeterminate permineralized organic fossil; possibly silicified wood or fossil bone

Small rounded pebble, likely quartz or quartzite

Undetermined; possibly quartz (SiO₂) or quartz-rich quartzite

Green stone fragment (unidentified)

Undetermined; possibly serpentine or greenstone, but the image is insufficient for identification

Rounded gray-brown rock, possibly quartz-rich metamorphic rock

Undetermined; appearance is consistent with quartzite or a quartz-rich gneiss

Likely quartz-bearing rock fragment

Undetermined; possibly quartz-rich granitic or volcanic rock

Weathered yellow-brown rock pebble

Undetermined; possibly iron-oxide-stained sandstone or mudstone

Small dark rock fragment (unidentified)

Undetermined; the image is insufficient for reliable mineral or rock identification

Unidentified dark-gray rock fragment

Undetermined; the photo is insufficient for reliable mineral or rock identification

Weathered rock fragment (likely granite or granitic gneiss)

Undetermined felsic rock; possibly quartz–feldspar granite

Small amber-colored mineral fragment (identity uncertain)

Undetermined; appearance alone is insufficient for a reliable mineral identification

White pebble, likely milky quartz or quartzite

Undetermined; probable quartz (SiO₂) or quartz-rich quartzite

Small dark mineral fragment

Undetermined; image lacks diagnostic detail for reliable identification

Dark, weathered stone pebble

Undetermined fine-grained dark rock; possibly basalt