Antropogenic (Man Made Material)

Fossil shark tooth in sediment

Likely fossilized shark tooth, possibly *Carcharhinus* or *Otodus*; exact identification requires the tooth’s full morphology and locality

Beaded gemstone bracelet, likely lapis lazuli and pale quartz/agate

Lapis lazuli: lazurite-rich rock, chiefly (Na,Ca)₈(AlSiO₄)₆(S,SO)₂; pale beads are uncertain

Unidentified polished dark gemstone cabochon

Possibly hematite, obsidian, jet, or dark agate; image insufficient for a definitive identification

Limestone

Calcareous sedimentary rock (CaCO3)

Jade bangle

Likely nephrite jade (actinolite–tremolite amphibole); possibly jadeite

Tumbled epidote-bearing rock (likely epidote–quartz–feldspar aggregate)

Epidote-rich metamorphic rock; minerals likely epidote (Ca₂(Al,Fe)₃Si₃O₁₂(OH), quartz, feldspar, and dark amphibole/biotite)

Diamond (in jewelry setting)

Adamantine Carbon (C)

Chert (Flint)

Microcrystalline Silica (SiO2)

River Pebbles (Chert and Quartzite)

Sedimentary Clastic Rock (Silica-rich)

Blue faceted gemstone, likely synthetic sapphire or blue glass

Corundum (Al₂O₃) if sapphire; identity cannot be confirmed visually

Sandstone

Arenite

Coquina

Bioclastic Limestone

Concrete-like aggregate surface with embedded rock fragments

Anthropogenic concrete or exposed aggregate; not a natural rock specimen

Blue glassy mineral fragment, possibly sodalite or dyed/cobalt glass

Uncertain; likely sodalite (Na₈Al₆Si₆O₂₄Cl₂) if natural, but vivid blue color may indicate cobalt-colored glass

Yellow chalcedony (likely lemon agate or yellow jasper)

Microcrystalline quartz, SiO₂; possibly iron-bearing jasper or chrysoprase-like chalcedony

Chert (Flint Arrowhead)

Silicon Dioxide (SiO2)

Galena (lead sulfide)

Galena, PbS

Likely banded obsidian or dark volcanic glass

Obsidian, predominantly rhyolitic volcanic glass (SiO₂-rich), possibly with devitrified bands and phenocrysts

Chert (often called Flint or Jasper)

Microcrystalline Quartz (SiO2)

Chert (Jasper)

Microcrystalline Quartz (SiO2)

Chert Nodule

Microcrystalline Quartz (SiO2)

Sandstone

Sandstone (composed predominantly of Quartz, SiO2, with Feldspar and Clay minerals)

Quartzite

Metamorphic Quartzite (SiO2)

Chert (varietal Flint)

Microcrystalline quartz (SiO2)

Sandstone

Arenite

Chert (Common Variety, Jasper)

Microcrystalline Quartz (SiO2)

Chert (Yellow Jasper/Flint)

Microcrystalline Quartz (SiO2)

Chert (Nodule)

Chert (Alpha-Quartz, SiO2)

Chert (Jasper/Flint variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Beaded gemstone jewelry (likely amethyst, lapis lazuli, and pearl or glass imitation)

Mixed mineral beads; possible quartz (SiO₂) and lazurite-bearing lapis lazuli

Decorative gemstone bracelet or jewelry

Unidentifiable from the blurred image; likely colored glass or synthetic stones, possibly mixed gemstone beads

Diamond (or Diamond Simulant)

Carbon (C)

Diamond in Kimberlite

Diamond (C in Kimberlite)

Yellow chalcedony (likely polished/tumbled pieces)

Microcrystalline quartz, SiO₂; commonly called yellow jasper or silicified limestone depending on exact texture

Likely gold-colored metal ring with a possible gemstone

Uncertain; possibly gold alloy (Au) with a small quartz or glass-like setting

Goldstone (blue-goldstone–style glass) beads

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

White Marble

Recrystallized Calcite (CaCO3)

Fossil coral in limestone

Fossilized colonial coral, likely tabulate or favositid coral (CaCO₃), preserved in calcitic limestone

Sandstone

Arenite (SiO2 primarily)

Faceted glass-like gemstone object

Likely synthetic glass or cubic zirconia; exact material cannot be confirmed from the image

Sandstone (likely Fossilized Wood or Concrete Simulacrum)

Arenite / Silicified Wood / Anthropogenic Concrete

Granite

Granite (Felsic Plutonic Rock)