Anthropogenic (Man Made Product Subject To Geological Processes)

Opalite

Synthetic Glass (Simulated Opal)

Opalite

Synthetically produced glass (Silicon Dioxide with metallic inclusions)

Opalite Egg

Synthetic Glass (Simulated Opal)

Green cabochon gemstone, likely aventurine or dyed chalcedony

Indeterminate from image; possible quartz variety (SiO₂), including aventurine quartz or chalcedony

Calcite

Calcium Carbonate (CaCO3)

Opalite

Synthetic Glass (SiO2 + impurities)

Opalite

Synthetic Opalised Glass

Chert (possibly a worked stone flake)

Microcrystalline quartz, SiO₂

Coquina

Bioclastic Limestone

Red faceted gemstone, possibly garnet

Likely almandine garnet, Fe₃Al₂(SiO₄)₃; identity cannot be confirmed from the image

Black tumbled stone, likely hematite

Hematite (Fe₂O₃); identification is uncertain from the image alone

Slate

Slate (Regional metamorphic rock composed primarily of quartz, illite, and chlorite)

Foliated metamorphic rock, likely mica schist

Muscovite- or biotite-bearing schist, commonly quartz–feldspar schist

Flint or chert artifact

Microcrystalline quartz (SiO₂), likely worked flint/chert

Tumbled green jasper (possibly serpentine)

Jasper, an opaque microcrystalline variety of quartz (SiO₂); exact identification is uncertain from the image

Gneiss pebble

Felsic banded gneiss, likely granitic in composition

Black slate

Slate, a fine-grained metamorphic rock composed mainly of mica-group minerals, chlorite, and quartz

Weathered gray gneiss

Quartz–feldspar–mica gneiss

Blue glass-like bead or gemstone keychain ornament

Indeterminate; likely cobalt-blue glass or synthetic blue spinel, not identifiable as a natural mineral from the image

Slate

Slate, a fine-grained metamorphic rock composed mainly of mica-group minerals and quartz

Milky quartz

Quartz (silicon dioxide, SiO₂)

Milky quartz

Quartz (silicon dioxide, SiO₂)

Milky quartz

Quartz (silicon dioxide, SiO₂)

Slate

Slate, a fine-grained metamorphic rock composed mainly of mica-group minerals and quartz

Milky quartz (rough fragment)

Quartz, silicon dioxide (SiO₂)

Blue-gray quartz-bearing metamorphic rock (likely gneiss or schist)

Quartz–feldspar–mica rock; exact identification requires testing

Orange Calcite

Calcium Carbonate (CaCO3)

Milky quartz

Quartz (silicon dioxide, SiO₂)

Milky quartz (likely)

Quartz, silicon dioxide (SiO₂)

Tumbled chalcedony pendant (likely agate)

Chalcedony, microcrystalline quartz (SiO₂); the pale bands suggest agate

Small gray translucent stone, possibly quartz or glassy mineral

Uncertain; likely microcrystalline quartz (SiO₂), but the image is insufficient for definitive identification

Red garnet-like faceted pendant

Possibly almandine garnet, Fe₃Al₂(SiO₄)₃; identification is uncertain from the image

Sulfur (native sulfur)

Native sulfur, S₈

Polished black stone, likely obsidian

Obsidian (volcanic glass; mostly silica-rich rhyolitic composition)

Quartz (Milky Quartz)

Silicon Dioxide (SiO2)

Unidentified gray stone/concrete-like fragment

Indeterminate; likely a fine-grained carbonate or cementitious geological fragment

Gold bullion bars

Native gold (Au), likely cast or refined metal

Greenstone (likely serpentinite or greenstone pebble)

Serpentinite-rich ultramafic rock; commonly dominated by serpentine-group minerals, with possible chlorite, actinolite, or magnetite

Weathered iron-rich rock, possibly limonite/goethite or ironstone

Limonite (hydrated iron oxides; commonly goethite, FeO(OH), with hematite and/or magnetite)

Ferruginous Quartz

Quartz (Silicon Dioxide, SiO2) with iron oxide inclusions

Yellow faceted gemstone, likely citrine or yellow sapphire

Uncertain; probable quartz (SiO₂) or corundum (Al₂O₃)

Blue glass-like gemstone specimen (likely dyed or synthetic quartz)

Uncertain; possibly blue-dyed quartz or synthetic glass, not confidently identifiable from the image