Sedimentary (Processed Mineral Product)

Fossilized bivalve shell fragment

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

Tiger's Eye

Pseudomorph of Quartz after Crocidolite (SiO2)

Bismuth crystal

Bismuth (Bi), artificially crystallized

Ocean Jasper

Orbicular Jasper (Silicon Dioxide, SiO2)

Gold bullion bars

Native gold (Au), likely cast or refined metal

Dyed red crystal aggregate, likely quartz or salt

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

Beaded mineral/crystal jewelry (likely turquoise and coral accents)

Variable; blue beads may be turquoise (CuAl6(PO4)4(OH)8·4H2O), with possible dyed howlite, glass, or composite materials

Amethyst bead bracelet

Amethyst, purple quartz (SiO₂)

Limonite (Ironstone) Concretion

FeO(OH)·nH2O (Hydrous ferric oxide)

Tumbled carnelian

Chalcedony (microcrystalline quartz), SiO₂

Goethite

Goethite (FeO(OH))

Clear Quartz Cluster

Quartz (Silicon Dioxide, SiO2)

Unidentified dark, flat specimen

Indeterminate; image resolution is insufficient for mineral identification

Likely graphite-rich schist (possibly galena-bearing metamorphic rock)

Graphite schist; chiefly quartz–mica with graphite (identification uncertain from photograph)

Quartzite Pebble

Metamorphic Quartz (SiO2)

Limestone

Calcium Carbonate (CaCO3)

Rough White Zircon

Zircon (Zirconium Silicate, ZrSiO4)

Milky Quartz

Quartz (Silicon Dioxide - SiO2)

Likely rose quartz or quartz-rich stone

Quartz, silicon dioxide (SiO₂); pink coloration may reflect trace iron, titanium, or inclusions

Blue calcite cluster

Calcite (calcium carbonate, CaCO₃)

Coal (likely Anthracite)

Anthracite coal

Prehnite

Prehnite (Ca2Al2Si3O10(OH)2)

Silver (Native or Alloyed)

Ag (Argentum)

Orbicular jasper (likely ocean jasper)

Silica-rich jasper, predominantly microcrystalline quartz (SiO₂), with iron-oxide and volcanic/mineral inclusions

Native Copper

Copper (Cu)

Vesicular basalt (probable scoriaceous basalt)

Basalt, composed mainly of plagioclase feldspar, pyroxene, and commonly olivine

Grey Chalcedony (Tumbled)

Chalcedony (SiO2)

Limonite (Iron-rich Gossan/Laterite)

FeO(OH)·nH2O (Hydrated Iron Oxide)

Red Claystone / Mudstone

Argillaceous sedimentary rock

Polished blue stone, likely sodalite or dyed quartz

Possibly sodalite (Na₈Al₆Si₆O₂₄Cl₂) or artificially dyed quartz/chalcedony; image alone is inconclusive

Green glassy slag or manufactured glass bead

Noncrystalline silicate glass; likely industrial glass/slag, not a true mineral

Kyanite

Kyanite (Al2SiO5)

Green cabochon gemstone pendant, likely turquoise or dyed green turquoise

Probably turquoise, CuAl₆(PO₄)₄(OH)₈·4H₂O; exact identification requires testing

Kyanite-bearing metamorphic rock

Blue kyanite (Al₂SiO₅), likely in mica- and garnet-rich schist

Quartzite River Cobble

Quartzite (primarily SiO2)

Kidney Stone

Calcium Oxalate (CaC2O4), Uric Acid, or Struvite

Goethite

Goethite (FeO(OH))

Weathered jasper-rich ironstone

Brecciated jasper/chert with iron oxides and hydroxides (SiO₂ with hematite, goethite, and limonite)

Goethite

Goethite (FeO(OH))

Banded Chert

Microcrystalline Quartz (SiO2)

Kyanite (Green and Blue varieties)

Kyanite (Al2SiO5)

Ferro-slag (Leland Blue/Slag Glass)

Anthropogenic Vitreous Silica (Industrial Slag)