Indeterminate

Japanese garden lantern and stepping stones

Likely granite (quartz, feldspar, and mica), though exact stone cannot be confirmed from the image

Tumbled yellow quartz pebble (likely citrine or iron-stained quartz)

Quartz, SiO₂; yellow coloration likely from iron impurities or irradiation-related defects

Fossiliferous limestone, possibly an oyster or other bivalve fossil

Calcite (CaCO₃) shell material preserved in micritic limestone; exact fossil taxon cannot be confirmed from one image

Tumbled yellow quartz, possibly citrine

Quartz (SiO₂), likely iron-colored citrine or pale golden chalcedony

Likely polished quartz or quartz-rich pebble

Quartz (silicon dioxide, SiO₂), possibly milky quartz

Chalcedony / milky quartz flake

Microcrystalline quartz (SiO₂), likely chalcedony; possibly a worked quartzite or chert fragment

Polished red plume agate

Microcrystalline quartz (chalcedony), SiO₂, with iron-oxide inclusions

Coral fossil (likely fossilized colonial coral)

Calcareous fossil coral; commonly *Scleractinia* or *Tabulate/ rugose coral* (identification requires close pore-pattern examination)

Conglomerate

Polymictic conglomerate; rounded clasts cemented in a fine-grained matrix

Polished septarian-style jasper or rhyolite

Likely silica-rich volcanic rock, possibly rhyolite, with iron-oxide and manganese-oxide veining

Tumbled brown agate (likely moss or plume agate)

Microcrystalline quartz, chiefly chalcedony (SiO₂), with iron-oxide and possibly mineral inclusions

Green cabochon ring stone (likely dyed jade, aventurine, or glass imitation)

Undetermined; possible nephrite jade (Ca₂(Mg,Fe)₅Si₈O₂₂(OH)₂), jadeite (NaAlSi₂O₆), or green aventurine quartz

Gemstone jewelry ensemble

Likely mixed gemstone and glass-bead jewelry; exact stones cannot be determined from the image

Polished jasper or chert pebble

Microcrystalline quartz (SiO₂), likely iron- and clay-rich jasper/chert

Decorative natural-stone tile assortment, likely marble and breccia

Calcite-rich marble and polymict carbonate breccia; exact varieties cannot be confirmed from the image

Rounded quartz-rich pebble

Likely quartzite or quartz-rich sandstone; composition predominantly SiO₂

Quartz-rich sandstone or quartzite

Quartzite (mostly microcrystalline SiO₂), possibly silicified sandstone

Tumbled cream-colored stone, likely milky quartz

Quartz (SiO₂), probably massive/milky quartz

Vesicular basalt pebble

Basalt, typically plagioclase–pyroxene–olivine with secondary iron oxides

Iron-stained quartzite or quartz-rich rock fragment

Quartzite; predominantly silicon dioxide (SiO₂), with iron-oxide staining

Rounded river pebble, likely weathered sandstone or iron-rich sedimentary rock

Indeterminate siliciclastic sediment; possibly ferruginous quartz sandstone

Dark, weathered stone—possibly basalt or slag

Indeterminate; likely fine-grained basalt (plagioclase–pyroxene)

Fossilized bone, likely a large vertebrate limb or rib fragment

Petrified bone; exact taxon indeterminate from the image

Fossilized shell or coral fragment

Indeterminate biogenic carbonate; likely calcite/aragonite (CaCO₃)

Unidentified pale mineral or rock specimen

Indeterminate; image quality prevents reliable mineral identification

Likely weathered brown rock fragment

Indeterminate; possibly iron-oxide-stained sandstone or laterite

Rounded gray-green pebble, likely basaltic or metamorphic

Indeterminate mafic rock; possibly basalt, diabase, or greenstone

Dark metamorphic rock, likely schist or slate fragment

Indeterminate; possibly biotite schist, chlorite schist, or slate

Likely weathered quartz-bearing rock

Indeterminate; possibly quartz-rich granite or granitic pegmatite

Weathered yellow-brown rock fragment

Indeterminate; possibly iron-stained sandstone or weathered limestone

Weathered brown rock fragment, possibly iron-rich sandstone or altered basalt

Indeterminate; likely an iron-oxide–stained silicate rock

Weathered light-colored rock, possibly quartz-rich granite or quartzite

Indeterminate; likely quartz–feldspar rock (granite) or quartzite

Fossilized bone fragment, possibly vertebra

Fossil bone (mineralized hydroxyapatite; exact taxon indeterminate)

Polished brown stone, possibly jasper or chert

Indeterminate microcrystalline quartz (SiO₂), likely jasper/chert

Rounded sandstone or quartzite pebble

Indeterminate; likely quartz-rich sandstone (SiO₂-dominated)

Rounded quartz-rich pebble, possibly weathered granite or quartzite

Indeterminate; likely quartz (SiO₂)-rich silicate rock

Rounded gray stone, likely quartz-rich sandstone or weathered granite

Indeterminate; probable granitic rock or quartz-feldspar sandstone

Rounded river pebble, possibly quartz-rich metamorphic rock

Indeterminate; likely quartzite or weathered quartz-bearing schist

Rounded river pebble, likely quartz-rich sandstone or weathered quartzite

Indeterminate; probable quartz (SiO₂)-rich clastic rock

Small greenish crystal/mineral fragment

Indeterminate; possibly olivine, quartz, or a green gemstone fragment

Blue-green tumbled mineral specimen

Indeterminate; possibly chrysocolla, turquoise, or azurite–malachite material

Fossilized shell or coral fragment

Indeterminate calcareous fossil; likely aragonite/calcite (CaCO₃)