Mineral, Sediment

Small rounded quartz-rich pebble

Likely quartz-bearing chert or weathered quartzite; exact identification requires testing

Weathered stone, likely sandstone or altered volcanic rock

Indeterminate; possibly quartz-rich sandstone or weathered tuff

Fossil bone or tooth fragment

Indeterminate fossilized vertebrate bone/tooth; taxonomic identification is not possible from this blurred image

Petrified Wood

Silicified Wood (primarily SiO2)

Beach Pebble (Basalt / Greywacke)

Basalt (or fine-grained Sedimentary Greywacke)

Fossilized Sea Urchin (Echinoid)

Echinoidea (Class) - likely replaced by Calcite or Quartz

Fossil gastropod shells

Fossilized marine gastropods; likely internal or external casts of coiled mollusks (Gastropoda)

Fossil gastropod shell

Spiral marine gastropod fossil; likely a small ammonite-like or gastropod shell, exact taxon indeterminate

Desert rose (gypsum)

Gypsum, CaSO₄·2H₂O; commonly a rosette of bladed gypsum crystals, sometimes with sand inclusions

Yellow Jasper

Chalcedony (SiO2 with iron oxide inclusions)

Petrified Wood

Silicified Wood (SiO2 as Quartz/Chert/Chalcedony)

Shark Tooth Fossil

Chondrichthyes (shark) tooth

Pumice

Vesicular volcanic glass, predominantly rhyolitic to dacitic composition

Weathered gray pebble

Likely fine-grained basalt or andesite; exact identification requires testing

Petrified Wood

Silicified wood (SiO2)

White pebble, possibly milky quartz

Unidentified white pebble; milky quartz (SiO₂) is a possible identification

Green aventurine

Quartzite dominated by quartz (SiO₂), commonly containing fuchsite mica or other inclusions

Red Jasper

Silicon Dioxide (SiO2) with iron oxide inclusions

Fossilized shell or coral fragment

Indeterminate biogenic carbonate; likely calcite/aragonite (CaCO₃)

Fossilized Shark Tooth

Chondrichthyes (Class)

Small brown mineral fragment, possibly quartz/chert

Uncertain; likely microcrystalline quartz (SiO₂) or a weathered silicate rock

Gold Flake (Placer Gold)

Native Gold (Au)

Fossil shell fragment

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

Banded jasper (polished/tumbled)

Microcrystalline quartz (SiO₂), commonly iron-oxide– and clay-rich chert

Kyanite

Al2SiO5

Marble

Recrystallized Carbonate Rock (CaCO3)

Gastropod Fossil (Snail Stone or Steinkern)

Class Gastropoda (Calcium Carbonate - CaCO3 / Silica - SiO2 replacing original shell)

Yellow-orange amber

Fossilized tree resin; amber is an organic mineraloid, not a true mineral

Small tan rock fragment

Unidentifiable lithic fragment; mineral composition undetermined

Fossiliferous shale or mudstone with plant fossils

Carbonaceous mudstone/shale containing fossilized foliage, likely fern or seed-fern impressions

Marble

Metamorphic Limestone (Calcite, CaCO3)

Fossil shark teeth

Likely fossilized shark teeth; exact species indeterminate from the image, possibly Carcharhiniformes or related taxa

Fossilized shell

Indeterminate bivalve shell; likely calcitic or aragonitic shell material (CaCO₃)

Quartz (Granular)

Silicon Dioxide (SiO2)

Fossilized tooth fragment, likely mammalian

Mineralized dentine and enamel; exact taxon indeterminate from the photograph

Weathered granite or granitic gneiss pebble

Granite; chiefly quartz, alkali feldspar, plagioclase, and minor biotite/hornblende

Petrified Wood

Silicified Wood (SiO2)

Weathered flint or chert fragment

Microcrystalline quartz (SiO₂), commonly called chert or flint

Fossilized shark tooth

Fossil shark tooth; exact shark species cannot be determined from this image

Quartz-rich pegmatite (milky quartz specimen)

Quartz, SiO₂, likely with feldspar and minor mica

Native gold (gold nugget)

Native gold, Au; commonly alloyed with silver and copper (electrum when silver-rich)

Fossil shark tooth

Likely a fossilized shark tooth, possibly *Carcharodon* or *Carcharhinus*; exact species requires provenance and close examination