Anthropogenic Material

Small brown pebble or possible shell fragment

Unidentified natural clast; the image is too small and blurred for reliable identification

Yellow tumbled stone, likely citrine or yellow chalcedony

Uncertain from the image; possibilities include quartz (SiO₂) or chalcedony (microcrystalline SiO₂)

Turquoise-colored bead on a metal earring

Unidentified blue-green bead; possibly turquoise (CuAl₆(PO₄)₄(OH)₈·4H₂O), but the image cannot confirm its material

Diamond

Diamond (pure Carbon, C)

Diamond

Carbon (C)

Quartz Vein in Siltstone

SiO2 (Quartz) on clastic sedimentary matrix

Quartz (Iron-stained)

Silicon Dioxide (SiO2)

Diamond (in Jewelry)

Carbon (C)

Gastropod Internal Mold (Steinkern)

Class Gastropoda fossil mold (Phylum Mollusca)

Likely weathered brown stone, possibly iron-rich sandstone or chert

Indeterminate from image; possible ferruginous sandstone (quartz + iron oxides) or iron-rich chert

Quartz-bearing rock fragment

Undetermined quartz-rich rock; visible white material is likely quartz (SiO₂), with dark fine-grained host rock

Diamond

Diamond (pure carbon, C)

Small gold-colored jewelry piece with clear stones

Likely a metal setting holding small faceted gemstones; the stones cannot be identified from the image.

Fossilized Gastropod Shell

Gastropoda (calcium carbonate / aragonite)

Petrified Wood

Silicified wood (SiO2)

Petrified Wood

Silicified wood (SiO2)

Petrified Wood

Silicified wood (SiO2)

Fossilized Bone

Permineralized Dinosaur or Megafauna Bone

Shark Tooth Fossil

Chondrichthyes dentition

Fossilized Coral

Cnidaria (replacement by silicon dioxide or calcium carbonate)

Fossilized Shell Fragment

Invertebrate fossil / Brachiopod or Mollusk shell fragment (Calcium carbonate, CaCO3)

Volcanic Breccia

Pyroclastic breccia

Jasper

Silicon Dioxide (Microcrystalline Quartz, SiO2)

Shark Tooth Fossil

Fossilized Chondrichthyes Tooth

Petrified Wood

Silicified wood (SiO2)

Shark Tooth Fossil

Chondrichthyes tooth fossil

Petrified Wood

Silicified wood (SiO2)

Petrified Wood

Silicified Wood (SiO2)

Petrified Wood

Silicified wood (SiO2)

Small fossilized tooth, possibly a shark tooth

Indeterminate fossil tooth; species cannot be identified from this image

Black Onyx and Mother of Pearl

Cryptocrystalline Quartz (SiO2) and Nacre (Calcium Carbonate)

Limonite (Iron Ore)

Limonite (FeO(OH)·nH2O)

Limestone and Quartz Gravel with Petrified Wood

Sedimentary gravel aggregate and fossilized wood

Jasper

Microcrystalline Quartz (SiO2)

Fossil Shark Tooth

Chondrichthyes (Class)

Blue Goldstone

Man-made glass with crystalline copper/cobalt inclusions

Jasper

Silicon dioxide (SiO2)

Faceted pink gemstone beads (possibly tourmaline)

Unidentified pink gem material; appearance may be consistent with pink tourmaline (elbaite), but the image is insufficient for confirmation

Blue calcite (probable)

Calcite, CaCO₃

Red coral chip bracelet

Corallium spp.; skeleton composed primarily of calcium carbonate (aragonite)

Serpentinite (probable)

Serpentinite; chiefly serpentine-group minerals (antigorite/lizardite/chrysotile), commonly with magnetite and minor olivine/pyroxene

Quartz-rich breccia or quartz vein fragment

Silica, primarily quartz (SiO₂), with possible chlorite, feldspar, or iron-oxide inclusions