Uncertain

Tumbled yellow-brown quartz pebble

Quartz (SiO₂), likely iron-stained or included quartz; exact variety uncertain

Tumbled amber or yellow chalcedony

Uncertain; likely quartz chalcedony (SiO₂), possibly natural amber (fossilized resin)

Weathered granite or granitic gneiss

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

Foliated metamorphic rock, likely gneiss or mica schist

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

Likely yellow calcite or sulfur-bearing mineral fragment

Calcite (CaCO₃) or native sulfur (S); identification is uncertain from the blurred image

Tumbled milky quartz (likely quartzite or quartz pebble)

Quartz, silicon dioxide (SiO₂); exact rock type is uncertain from the image

Light-colored weathered stone, likely quartz-rich granite or quartzite

Tentative: granite (quartz + feldspar + mica); exact identification is uncertain from the image

Weathered granite or granitic gneiss fragment

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

Likely weathered iron-rich rock or slag fragment

Uncertain; possibly limonite/goethite-rich material (FeO(OH)·nH₂O)

Tumbled granite or granitic pebble

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

Fossilized coral or carbonate fossil fragment

Calcareous fossil, likely colonial coral (order Hexacorallia; uncertain from image)

Weathered granite or granitic gneiss

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

Black glassy fragment, likely obsidian or industrial glass

Volcanic glass (obsidian), chiefly amorphous SiO₂; identification uncertain from image

Likely weathered metallic mineral or slag fragment

Uncertain; possibly limonite/goethite-coated iron mineral, or industrial iron slag

Weathered granite or granitic gneiss boulder

Granite; predominantly quartz, feldspar, and mica (exact identification is uncertain from a photograph)

Pink tumbled stone, likely rose quartz or pink jasper

Uncertain; quartz (SiO₂) if rose quartz, or microcrystalline quartz/chalcedony if pink jasper

Mixed rounded cobbles, likely granite and weathered volcanic rock

Granite and probable andesite/basalt clasts; exact identification is uncertain from the photograph

Rounded quartz-rich pebble

Probable arkosic sandstone or weathered quartzite; exact identification is uncertain from the image

Fossilized bivalve or ammonite fragment

Calcareous fossil; likely a mollusk shell preserved as calcite (taxonomic identification uncertain)

Weathered iron-rich stone, possibly limonite-bearing rock

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

Likely weathered iron-rich rock or laterite

Uncertain; possible limonite/goethite-rich laterite (FeO(OH)·nH₂O)

Likely polished white-and-gray stone, possibly marble or quartzite

Uncertain from image; likely calcite-rich marble (CaCO₃) or quartzite (SiO₂)

Tumbled amber-like brown stone

Uncertain; likely brown jasper or iron-rich chert, possibly amber imitation

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

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

Weathered granite or granitic gneiss fragment

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

Weathered limestone fragment, possibly fossiliferous

Calcite-rich limestone (CaCO₃); exact identification is uncertain from one image

Weathered gray rock fragment

Likely granitic or volcanic feldspathic rock; exact identification is uncertain from the image

Weathered granite or granitic gneiss

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

Weathered granitoid (likely granite or granitic gneiss)

Granite; chiefly quartz, feldspar, and mica (exact identification uncertain from the photo)

Rounded pale quartz-rich pebble

Likely milky quartz or quartzite (SiO₂); exact identification is uncertain from the photograph

Quartz-rich pebble, possibly chert or silicified limestone

Microcrystalline quartz (SiO₂), possibly chalcedony; exact identification is uncertain from the photograph

Polished orange agate/jasper cabochon

Microcrystalline quartz (chalcedony), SiO₂, with iron-oxide coloration; exact variety uncertain

Possible weathered mica-rich metamorphic fragment

Mica schist or phyllite (quartz–mica assemblage; identification uncertain from image)

Weathered metallic sulfide-bearing rock, possibly chalcopyrite ore

Likely chalcopyrite (CuFeS₂) in a weathered host rock; identification is uncertain from the photograph

Likely iron-rich rock or metallic mineral fragment

Uncertain; possibly limonite/goethite-rich material or weathered iron meteorite fragment

Weathered quartz-rich rock, likely quartzite or altered sandstone

Quartzite (mostly microcrystalline quartz, SiO₂); exact identification is uncertain from the photograph

Tumbled chert or flint pebble

Microcrystalline quartz (SiO₂), likely chert; exact variety uncertain from the image

Tumbled gray stone, likely serpentinite or weathered basalt

Tentatively serpentinite (predominantly serpentine-group minerals); identification is uncertain from the photograph

Quartz-rich metallic sulfide ore (probable pyrite-bearing rock)

Pyrite, FeS₂, in a quartz-rich host; exact identification is uncertain from the image

Quartz-bearing rock or quartz-rich mineral specimen

Quartz, silicon dioxide (SiO₂); exact host rock is uncertain from the image

Likely weathered brown quartz-bearing rock

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

Small colored gemstone or glass cabochons (uncertain)

Not identifiable from the image; the pieces may be colored glass or synthetic stones rather than natural minerals.