Uncertain

Likely polished dark stone (identity uncertain)

Undetermined; possibly polished basalt, chert, or another dark silicate rock

Weathered rock pebble, possibly quartz-rich sandstone

Uncertain from the image; likely quartz-bearing sandstone with iron-oxide staining

Likely quartz-rich metamorphic rock fragment

Probable quartzite or quartz-bearing schist; exact identification is uncertain from the image

Small dark pebble, likely basalt or iron-rich rock

Uncertain from image; possibly fine-grained basalt (mafic silicate rock)

Likely ironstone pebble

Ironstone, probably goethite/hematite-rich; exact identification is uncertain from the image

Engraved green stone worry pebble

Likely nephrite jade (tremolite–actinolite series); identification is uncertain from the image

White quartz-rich rock, possibly milky quartz

Quartz (SiO₂), likely massive milky quartz; identification is uncertain from the image

Iron-stained quartz vein in host rock

Quartz (SiO₂), with iron-oxide staining; host rock is uncertain from the image

Likely rough granite or granitic rock fragment

Granite (quartz–feldspar–mica assemblage; exact identification is uncertain from the image)

Rounded pebble, likely quartzite

Quartzite (dominantly recrystallized quartz, SiO₂); identification is uncertain from the image alone

Polished pink chalcedony (possibly carnelian)

Microcrystalline quartz, SiO₂; chalcedony variety, with exact variety uncertain from the image

Likely amber or amber-like resin fragment

Amber (fossilized plant resin), commonly succinite; identification uncertain from the image

Iron-rich sulfide-bearing metamorphic rock

Likely pyrite- and/or chalcopyrite-bearing schist; identification is uncertain from imagery alone

Fossilized tooth, likely a shark tooth

Fossil vertebrate tooth; exact taxon uncertain, possibly Otodus/Carcharodon-type

Granite-like rock

Likely weathered granite or granitic gneiss; exact identification is uncertain from the photograph

Likely gold-colored metal ring with a possible gemstone

Uncertain; possibly gold alloy (Au) with a small quartz or glass-like setting

Dark gray river pebble, likely basalt or fine-grained metamorphic stone

Probable basalt (plagioclase–pyroxene aggregate); exact identification is uncertain from the photograph

Likely native metallic mineral specimen

Uncertain from photograph; possibly pyrite (FeS₂) or a sulfide-rich metallic ore

Small polished cabochon, likely green/gray beryl or agate

Uncertain from image; possible beryl (Be₃Al₂Si₆O₁₈) or chalcedony (SiO₂)

White quartz-rich rock, possibly marble or quartzite

Quartz (SiO₂)-rich metamorphic stone; exact identification is uncertain from the photograph

Rounded granitic river pebble

Granite, chiefly quartz, feldspar, and mica; exact identification is uncertain from the image

Faceted glass-like gemstone (likely synthetic quartz or cubic zirconia)

Identification uncertain; possibilities include synthetic quartz (SiO₂) or cubic zirconia (ZrO₂)

Polished gray stone pebble

Likely fine-grained basalt or andesite; exact identification is uncertain from the photograph

Pink-red faceted gemstone, possibly synthetic corundum or spinel

Uncertain; possible ruby (corundum, Al₂O₃) or red spinel (MgAl₂O₄)

Weathered granite or granitic gneiss pebble

Granite; primarily quartz, feldspar, and mica (exact identification is uncertain from the image)

Tumbled amber-like specimen

Amber (fossilized tree resin), commonly succinite; identification uncertain from image

Weathered quartz-rich metamorphic rock, likely gneiss or quartzite

Quartz–feldspar–mica metamorphic rock; exact identification is uncertain from the photograph

Rounded gray stream cobble, likely weathered basalt

Basalt (fine-grained mafic volcanic rock; identification uncertain from photograph)

Gray sandstone or weathered volcanic rock

Likely quartz-rich sandstone; exact identification is uncertain from the image alone

Biotite-bearing mica schist (probable)

Mica schist, chiefly quartz + muscovite/biotite; composition is uncertain from the photograph

Polished black stone pendant

Likely black obsidian or black tourmaline; exact identification is uncertain from the photograph

Quartz-rich river pebble, possibly weathered quartzite

Quartzite; predominantly crystalline SiO₂, though exact identification is uncertain from the photograph

Tumbled reddish-brown stone, possibly jasper or iron-rich quartzite

Uncertain from image; likely microcrystalline quartz (SiO₂) with iron-oxide inclusions

Rounded granite or granitic pebble

Granite; mainly quartz, feldspar, and mica (exact identification is uncertain from the photograph)

Polished gray stone, likely quartzite or river-worn granite

Tentatively quartzite (mostly microcrystalline SiO₂); exact identification is uncertain from the photograph

Likely black diamond or dark faceted gemstone ring

Uncertain from the photograph; possibly carbon (diamond) or black spinel, set in metal

Likely weathered granite or quartz-rich gravel

Granite, typically quartz + feldspar + mica; exact identification is uncertain from the image

Weathered mica-rich rock fragment

Likely biotite granite or granitic gneiss; exact identification is uncertain from the photograph

Small brown mineral/rock fragment

Uncertain; possibly iron-oxide-stained quartz, jasper, or a weathered ironstone fragment

Weathered iron-rich rock, possibly limonite-bearing sandstone or laterite

Limonite/goethite mixture (hydrated iron oxides), composition uncertain from image

Unidentified yellow-orange mineral fragment

Possibly iron-stained quartz, calcite, or citrine; identification is uncertain from the image

Concrete-like limestone or cemented carbonate rock

Likely limestone (calcium carbonate, CaCO₃); exact identification is uncertain from the image