Indeterminate

Small rounded light-colored mineral pebble

Indeterminate; possibly quartz, feldspar, or calcite

Tumbled white mineral fragment

Indeterminate; possibly milky quartz or calcite

Fossil brachiopod shell

Brachiopoda indeterminate; possibly a strophomenid or spiriferid

Fossilized tooth, likely mammalian molar

Indeterminate Mammalia; mineralized dentine and enamel

Small white mineral fragment

Indeterminate; possibly quartz, calcite, or feldspar

Decorative opal-like turtle mosaic

Likely imitation or assembled opal material; exact stones cannot be confirmed visually

Speckled rounded stone, possibly basalt or diorite

Indeterminate mafic/intermediate igneous rock; likely fine-grained basaltic or dioritic material

Likely weathered quartz-rich pebble

Uncertain; possibly granite or quartz-bearing volcanic rock

Rounded river pebble

Unidentified fine-grained clastic rock, possibly sandstone or mudstone

Likely black cabochon gemstone pendant

Uncertain; possibly black star sapphire, black spinel, or obsidian

Rounded quartz-rich pebble, possibly milky quartz

Quartz (SiO₂), provisional identification

Weathered iron-rich rock fragment

Likely limonite/goethite-bearing material; exact identification requires testing

Fossil shell fragment

Likely a fossilized brachiopod or bivalve; exact taxon cannot be determined from the image

Tumbled dark stone, possibly hematite or polished basalt

Uncertain; likely hematite (Fe₂O₃) or a polished mafic rock

Likely yellow jasper or iron-stained quartzite pebble

Jasper: microcrystalline quartz (SiO₂), commonly colored by iron oxides; quartzite: recrystallized quartz (SiO₂)

Yellow quartz fragment (likely citrine or iron-stained quartz)

Quartz, silicon dioxide (SiO₂), trigonal crystal system

Tumbled quartz-rich pebble

Likely quartzite or quartz-rich sandstone; predominantly SiO₂

Possible iron-rich concretion or weathered ironstone

Goethite/hematite-bearing limonite concretion (tentative)

Faceted clear gemstone, likely glass imitation or cubic zirconia

Uncertain; possibilities include cubic zirconia (zirconium dioxide, ZrO₂), quartz (SiO₂), or lead glass

Likely porphyritic volcanic rock

Indeterminate; possibly porphyritic andesite or basalt

Fossil shell fragment, likely brachiopod or bivalve

Indeterminate bioclast; possible Brachiopoda or Mollusca

Rounded pale pebble, likely quartz-rich rock

Indeterminate; possibly quartzite or weathered limestone

Rounded brown cobble, likely weathered sandstone or iron-rich sedimentary rock

Indeterminate; possibly ferruginous sandstone or ironstone

Fossilized shell or bone fragment

Indeterminate biogenic calcite or apatite fossil

Weathered brown quartz-rich rock, likely sandstone

Quartz-rich sandstone (indeterminate lithology)

Polished black mineral or volcanic glass fragment

Indeterminate; possibly obsidian or black tourmaline

Weathered sandstone pebble

Quartz-rich sandstone, likely dominated by quartz (SiO₂) with minor clay and iron-oxide staining

Dyed red crystal aggregate, likely quartz or salt

Uncertain; possibly dyed quartz (SiO₂) or halite (NaCl)

Likely weathered sandstone or iron-rich limestone

Indeterminate clastic carbonate rock; apparent iron-oxide staining (goethite/hematite)

Reddish sandstone or iron-stained quartzite pebble

Likely ferruginous sandstone; possibly quartzite, composed mainly of quartz (SiO₂) with iron oxides

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

Indeterminate; probable quartz (SiO₂)-rich sandstone/quartzite with iron-oxide staining

Fine-grained gray sandstone or quartz-rich sedimentary pebble

Likely quartz arenite or lithic sandstone; exact identification requires microscopy or testing

Likely tumbled quartz or feldspar pebble

Indeterminate; possibly quartz (SiO₂) or potassium feldspar (KAlSi₃O₈)

Fossiliferous limestone with a fossil sea urchin

Bioclastic limestone containing an echinoid fossil (class Echinoidea)

Blue-green slag glass or chalcedony-like material

Likely industrial glassy slag; exact identification requires testing

Blue-gray quartz-rich rock, likely sodalite-bearing syenite or granite

Probable sodalite-bearing nepheline syenite; composition may include quartz, feldspar, sodalite, and dark mafic minerals

Quartz-rich sandstone or quartzite fragment

Quartz (SiO₂) with iron-oxide staining; possibly weakly metamorphosed quartzite

Rounded iron-rich stone, likely hematite-bearing sandstone or ironstone

Hematite/goethite-bearing ferruginous sandstone or ironstone; composition cannot be confirmed from appearance alone

Fossilized bivalve shell fragment

Calcitic mollusk shell, commonly Bivalvia; exact genus cannot be determined from the image

Tumbled milky quartz pebble

Quartz (silicon dioxide, SiO₂)

Tumbled quartz pebble with iron-oxide inclusions

Quartz (SiO₂), stained by hematite/goethite

Orange mineral fragment, possibly iron oxide or carnelian

Uncertain; candidates include hematite/goethite (Fe₂O₃/FeO(OH)) or orange chalcedony (SiO₂)