Anthropogenic (Human Made) Sedimentary Like Material

Carved serpentine pendant

Serpentine-group minerals, commonly antigorite/lizardite (Mg₃Si₂O₅(OH)₄), possibly mixed with chlorite or other inclusions

Goldstone (blue-goldstone–style glass) beads

Artificial aventurine glass, typically silica glass with copper inclusions; not a natural mineral

Engineered Quartz (Quartzite look-alike)

Silicon Dioxide (SiO2) composite

Chert Nodule

Microcrystalline Quartz (SiO2)

Chert (Jasper)

Silicon dioxide (SiO2)

Mounted faceted gemstone ring

Likely diamond (carbon, C), though the image is insufficient for definitive identification

Chert (varieties include Flint and Jasper)

Microcrystalline or cryptocrystalline Quartz (SiO2)

Chert

Microcrystalline silica (SiO2)

Fossilized Coral (Coquina/Limestone)

Cnidaria Anthozoa (Fossilized)

Chert (Chert / Flint)

Microcrystalline Quartz (SiO2)

Chert (Flint)

Microcrystalline Quartz (SiO2)

Goldstone and Aura Quartz

Cuprous Glass (Goldstone) and Titanium-coated SiO2 (Aura Quartz)

Quartzite / Chert Nodular Rock

Silicon Dioxide (SiO2) / Microcrystalline Quartz

Sandstone

Arenite (composed primarily of SiO2)

Chert (Jasper/Flint variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Tumbled blue stone, likely blue calcite or dyed stone

Probably calcite (CaCO₃); exact identification is uncertain from the blurred image

Coquina

Bioclastic Limestone (Coquina)

Likely weathered iron-rich rock or slag fragment

Uncertain; possibly limonite/goethite-rich material (FeO(OH)·nH₂O)

Sandstone

Arenite (with iron oxide cement)

Chert (Flint)

Chert (Silicon Dioxide, SiO2)

Baked-clay ceramic fragment (likely brick or pottery)

Fired clay, primarily aluminosilicate minerals; not a natural rock

Inlaid stone ring (likely jasper or agate)

Likely microcrystalline quartz (chalcedony, SiO₂), possibly jasper, with decorative mineral inlays

Sea Glass

Amorphous silicon dioxide (SiO2) - Man-made glass tumbled by nature

Polished dark gemstone, likely hematite or magnetite

Hematite (Fe₂O₃) or magnetite (Fe₃O₄); exact identification requires testing

Banded agate pendant (likely carnelian or brown-and-white chalcedony agate)

Agate, a banded variety of chalcedony; microcrystalline quartz, SiO₂, with iron-oxide coloration

Chert (Flint)

Microcrystalline Quartz (SiO2)

Brick fragment (Man-made material)

N/A (Fired clay)

Chert

Microcrystalline Quartz (SiO2)

Chert (Flint pebble)

Microcrystalline Quartz (SiO2)

Sandstone

Arenite

Sandstone

Arenite (composed primarily of SiO2)

Chert (and Agate/Chalcedony)

Microcrystalline Quartz (SiO2)

Goldstone

Aventurine glass (Synthetic glass with copper inclusions)

Chert (specifically Flint or Nodular Chert)

Silicon dioxide (SiO2)

Slag (Industrial)

N/A (Anthropogenic Slag)

Polished black pebble, possibly obsidian

Volcanic glass (obsidian), likely; identification is tentative from the image

Native silver fragment (probable)

Silver, Ag; possibly silver-bearing sulfide or plated metal

Chert (Commonly known as Flint)

Silicon Dioxide (SiO2)

Chert (Jasper/Flint var.)

Silicon Dioxide (SiO2)

Chert (Chalky Flint Node)

Chert (Microcrystalline Quartz, SiO2)

Likely weathered granite or granitic gneiss fragment

Granite; primarily quartz, feldspar, and mica

Chert (Flint nodule)

Silicon dioxide (SiO2)