Anthropogenic Material

Weathered quartz-rich rock, possibly granite or quartzite

Indeterminate; likely quartz–feldspar aggregate, potentially granitic or quartzitic material

Engineer Quartz/Quartzite

SiO2 (Silicon Dioxide with binders)

Ferrochrome Slag

Calcium-Aluminium-Magnesium Silicate Slag

Red coral beads (likely dyed or treated coral)

Corallium spp. (precious coral; calcium-carbonate skeleton, chiefly calcite)

Blue-green aventurine beads (likely dyed or treated quartz)

Quartz, SiO₂; aventurine is quartz containing fine mineral inclusions

Tektite (Indochinite)

Tektite (High-silica impact glass)

Chert Pebble

Microcrystalline silica (SiO2)

Limestone

Calcium Carbonate (CaCO3)

Limestone

Calcium Carbonate (CaCO3)

Fossil bivalve shell

Ribbed pectinid or related bivalve; originally calcite/aragonite (CaCO₃), likely partially mineralized

Rounded brown chert or jasper pebble

Microcrystalline quartz (SiO₂), likely ferruginous chert/jasper

Epidote-rich rock (likely epidotite or altered basalt)

Epidote, Ca₂(Al,Fe³⁺)₃(SiO₄)₃(OH); possibly epidote-bearing mafic rock

Sandstone

Arenite (primarily SiO2)

Garnet Schist

Garnetiferous Mica Schist

Coquina or Fossiliferous Limestone

Fossiliferous Calcarenite (CaCO3)

Jasper / Chert (Red)

Cryptocrystalline quartz (SiO2)

Polished brecciated jasper pendant

Silica-rich jasper (microcrystalline quartz, SiO₂), brecciated and cemented by silica or iron-rich material

Tumbled turquoise

Turquoise, hydrated copper aluminum phosphate — CuAl₆(PO₄)₄(OH)₈·4H₂O

Tumbled quartz-rich stone, likely orange chalcedony or iron-stained quartzite

Microcrystalline quartz (SiO₂), possibly quartzite; orange coloration from iron oxides

Fossilized Bone Fragment

Petrified Osseous Material

Cubic Zirconia

Zirconium dioxide (ZrO2)

Polished white-and-brown chalcedony (likely agate/jasper)

Microcrystalline quartz, SiO₂; chalcedony with iron-oxide staining or jasperous inclusions

Limestone

Sedimentary Calcium Carbonate (CaCO3)

Orbicular Granite (specifically Mustard or Yellow Tonalite/Granodiorite)

Orbicular Quartz Diorite / Tonalite

Limestone (Weathered)

Sedimentary Carbonate Rock (CaCO3)

Tumbled cream-colored pebble

Likely quartz-rich sandstone or limestone; exact identification requires testing

Rough amethyst-bearing quartz specimens

Quartz, SiO₂; purple coloration from trace iron and irradiation

Turquoise jewelry beads/earrings

Turquoise, hydrated copper–aluminum phosphate: CuAl₆(PO₄)₄(OH)₈·4H₂O; possibly reconstructed or imitation turquoise

Tumbled yellow-brown stone, likely quartzite or chalcedony

Quartz-rich rock; predominantly microcrystalline quartz (SiO₂), identification uncertain from image alone

Possible ironstone or iron-oxide-rich mineral fragment

Unidentified iron oxide/hydroxide, possibly goethite or limonite

Brown chalcedony (likely jasper or petrified wood fragment)

Microcrystalline quartz, SiO₂; brown coloration likely from iron oxides

Petrified Wood (Jet or Coalified Wood appearance)

Silicified wood (principally SiO2) or Carbonized Wood

Petrified Wood

Silicified Wood (primarily Quartz/Chalcedony, formula SiO2)

Iron-stained quartz-rich rock, possibly quartz vein material

Quartz-rich vein rock with iron oxides/hydroxides (quartz, Fe₂O₃/FeO(OH)); exact identification requires testing

Tumbled orange chalcedony or common opal

Microcrystalline quartz (SiO₂), possibly hydrated silica opal (SiO₂·nH₂O)

Tumbled brown stone, possibly chert or iron-stained quartzite

Indeterminate from photograph; possible microcrystalline quartz (SiO₂)

Polished botryoidal jasper/chalcedony (likely ocean jasper)

Microcrystalline quartz, SiO₂, with iron-oxide and other mineral inclusions

Vesicular basalt (likely scoriaceous basalt)

Mafic volcanic rock, chiefly plagioclase, pyroxene, and olivine; commonly iron-rich volcanic glass

Polished greenstone/serpentine pebble (probable)

Serpentinite, dominated by serpentine-group minerals (lizardite/chrysotile); possible accessory olivine or chlorite

Green copper-bearing rock, likely chrysocolla-bearing quartz or host rock

Chrysocolla (Cu₂H₂Si₂O₅(OH)₄·nH₂O), possibly mixed with quartz and copper oxides

Tumbled fossil shark tooth pendant

Likely fossilized shark tooth, possibly Otodus or Carcharhinus; exact species cannot be confirmed from the image

Weathered quartz-rich rock or fossil fragment

Indeterminate; likely quartz-bearing sandstone or siliceous fossil material