Man Made Material (Constructed)

Yellow chalcedony (likely lemon agate or yellow jasper)

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

Galena (lead sulfide)

Galena, PbS

Chert (Flint Arrowhead)

Silicon Dioxide (SiO2)

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)

Diamond (as set in a metal alloy ring)

Diamond (Pure Carbon, C)

Dark rounded pebble, likely basalt or slag

Probable fine-grained mafic rock; possibly basalt (plagioclase–pyroxene) or industrial iron/steel slag

Green Aventurine

Quartz (SiO2) with Fuchsite inclusions

Polished jasper pendant

Jasper, microcrystalline quartz (SiO₂) with iron-oxide and other mineral inclusions

Polished orbicular jasper

Jasper, microcrystalline quartz (SiO₂), with iron oxides and other inclusions

Sandstone

Arenite

Diamond (in jewelry setting)

Diamond (C - Carbon)

Rounded pink granite cobble

Granite, chiefly quartz–alkali feldspar–plagioclase–biotite

Blue chalcedony bead necklace

Chalcedony, microcrystalline quartz (SiO₂), commonly blue-dyed or blue-gray natural chalcedony

Coquina

Bioclastic Limestone (Calcium Carbonate, CaCO3)

Asphalt Chunk (with aggregate)

Bituminous concrete / Anthropogenic conglomerate

Chert or silicified sedimentary fragment (tentative)

Microcrystalline quartz (SiO₂), possibly silicified limestone or fossil-bearing chert

Sandstone (likely Fossiliferous)

Arenite / Fossiliferous Sandstone (SiO2 composition)

Chert (Flint)

Chert (Cryptocrystalline Silica, SiO2)