Indeterminate

Likely weathered metallic mineral or slag fragment

Indeterminate; possibly iron-rich sulfide/oxide material or industrial slag

Small white crystalline mineral fragment

Indeterminate; possibly calcite or quartz

Small pale mineral fragment

Indeterminate; possibly quartz or calcite

Bivalve Fossil (Internal Mold)

Class Bivalvia (Indeterminate genus)

Likely small metallic meteorite fragments

Unclassified iron or stony-iron meteorite; mineralogy cannot be confirmed from the image

Iron-stained quartz or chert fragment

Quartz (SiO₂), possibly microcrystalline quartz/chert with limonite staining

Pale-green schist fragment

Chlorite–sericite schist, possibly containing epidote or actinolite

Weathered sandstone pebble

Quartz-rich sandstone, likely iron-oxide-stained (SiO₂-dominant)

Rounded brown sandstone or weathered river cobble

Likely quartz-rich sandstone; exact identification requires a fresh surface and tests

Quartz-bearing dark rock, possibly hornfels or basalt

Probable quartz–feldspar rock; exact identification requires testing

Polished sedimentary pebble, likely sandstone or quartzite

Quartz-rich sandstone (SiO₂-dominant), possibly weakly metamorphosed quartzite

Tumbled sandstone or weathered limestone pebble

Likely quartz-rich sandstone (SiO₂) or calcarenite/limestone (CaCO₃)

Iron-rich weathered rock, possibly goethite/limonite-bearing sandstone or ironstone

Limonite (hydrated iron oxides; chiefly goethite, FeO(OH), with hematite, Fe₂O₃)

Unidentified gray-brown stone

Likely fine-grained quartz–feldspar rock; exact identification is not possible from this close, blurred image

Quartz-bearing rock fragment

Likely quartz (SiO₂) with iron-oxide staining and possible host-rock grains

Fossil fish specimen

Fossilized fish vertebrate, likely an articulated fish impression; exact taxon indeterminate

Likely tumbled yellow-orange mineral or glassy stone

Indeterminate from photograph; possibilities include yellow jasper, calcite, agate, or dyed quartz

Weathered quartz-rich pebble

Likely quartz aggregate, SiO₂, possibly quartzite or silicified rock

Weathered iron-rich stone, possibly jasper or chert

Microcrystalline quartz (SiO₂), likely stained by iron oxides/hydroxides

Weathered river pebble, likely quartz-rich sandstone or iron-stained quartzite

Provisional identification: quartz-rich sandstone/quartzite; exact composition cannot be confirmed from the image

Likely weathered porphyritic igneous rock

Provisional identification: altered basaltic-andesite or rhyolite; exact mineralogy cannot be confirmed from this close, flash-lit image

Weathered quartz-rich pebble

Likely milky quartz (SiO₂), possibly a quartz-rich vein fragment

Weathered iron-rich quartzite or chert nodule

Quartzite/chert, predominantly microcrystalline SiO₂ with iron-oxide staining

Rounded sandstone pebble

Quartz-rich sandstone, commonly arkose or lithic sandstone

Flagstone, likely weathered sandstone or limestone

Layered clastic carbonate rock; exact mineralogy cannot be confirmed from the image

Dark mafic igneous rock, likely basalt or gabbro

Basalt–gabbroic rock; mainly plagioclase feldspar and pyroxene, possibly olivine or magnetite

Decorative opal-like turtle mosaic

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

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

Quartz, silicon dioxide (SiO₂), trigonal crystal system

Likely yellow jasper or iron-stained quartzite pebble

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

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)

Likely sandstone

Quartz-rich sandstone (indeterminate variety)

Fossil brachiopod shell

Brachiopoda; exact genus/species 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

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