Anthropogenic (Human Made) Sedimentary Like Material

Sea Glass

Amorphous silicon dioxide (glass)

Chert (Flinty variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Blue gemstone cross pendant

Likely faceted blue topaz (Al₂SiO₄(F,OH)₂); identification is uncertain from the image

Green sea glass (likely slag glass or bottle glass)

Man-made soda-lime silicate glass; not a naturally occurring mineral

Ferro-silicate Slag

Industrial Vitrified Slag (High-silica amorphous glass)

Polished yellow-green serpentine pendant

Serpentine-group minerals, chiefly antigorite and/or lizardite; approximate formula Mg3Si2O5(OH)4

Aura Quartz

Titanium-coated Silicon Dioxide (SiO2)

Likely gold-colored metal ring with a possible gemstone

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

Black Chert River Stone

Cryptocrystalline Quartz (SiO2)

Paving-concrete aggregate with a rounded stone

Polymictic gravel aggregate; the central clast appears to be weathered sandstone or volcanic rock

Asphalt (Bituminous Concrete)

Bituminous mix / Anthropogenic conglomerate

Chert (specifically Zebra Chert/Flint)

Silicon Dioxide (SiO2)

Diamond ring

Diamond, crystalline carbon (C)

Native American Pottery Sherd

Flint / Chert

Silicon dioxide (SiO2)

Chert (and Flint)

Silicon Dioxide (SiO2)

Chert (Arrowhead/Projectile Point)

Chert (Cryptocrystalline Quartz, SiO2)

Blue Apatite

Apatite (Calcium Phosphate) - Ca5(PO4)3(F,Cl,OH)

Black-and-white agate geode pendant

Agate (microcrystalline quartz, SiO₂), likely a hollow geode slice with chalcedony and drusy quartz

Sandstone-based Concrete Fragment

Cementitious Composite with Sedimentary Aggregate

Clear-stone silver-tone teardrop earring

The stones may be colorless quartz or glass; the image does not allow reliable identification. Metal setting appears silver-tone.

Asphalt aggregate

Human-made bituminous asphalt containing crushed silicate rock aggregate

Black-and-white agate or onyx bead necklace

Variegated chalcedony (microcrystalline SiO₂), possibly black-and-white banded agate; some black beads may be dyed chalcedony or hematite

Chert

Silicon dioxide (SiO2)

Flaked stone projectile point

Likely worked chert or fine-grained silicified shale; exact lithology cannot be confirmed from the image

Chert (specifically Jasper or Flint variety)

Cryptocrystalline Quartz (SiO2)

Colorless faceted gemstone, likely quartz

Quartz (SiO₂), tentative identification; the photo is insufficient to confirm the material

Blue glass-like tumbled specimen

Most likely cobalt-blue slag glass or manufactured glass; not confidently identifiable as a natural mineral from the image

Chert (Nodule/Pebble)

Chert (Silicon Dioxide, SiO2)

Chert (Jasper/Flint variant)

Silicon Dioxide (SiO2)

Chert (Flint variety)

Microcrystalline or Cryptocrystalline Quartz (SiO2)

Beaded blue-and-green gemstone jewelry

Likely dyed or treated chalcedony/agate and green aventurine or glass-like stone; exact identification requires testing

Tumbled serpentine

Serpentine-group minerals, chiefly antigorite, lizardite, or chrysotile; approximately Mg₃Si₂O₅(OH)₄

Asphalt (Bituminous Concrete)

Bituminous mix containing aggregates and petroleum-based binder (CnH2n+2)

Glass

Amorphous Silicon Dioxide (SiO2)

Slag

Anthropogenic Iron Silicate Glass

Nutting Stone / Cupstone (Sandstone or Quartzite)

Sedimentary rock with anthropogenic modification (cupule)

Aura Quartz (Titanium/Rainbow Quartz)

SiO2 (Silicon Dioxide) with metallic coating

Multicolor quartz bead bracelet

Quartz (silicon dioxide, SiO₂); bead colors may be from different varieties or treated quartz

Carved Mottled Greenish-Yellow Crystal/Glass Object

Unknown; possibly a form of quartz (chalcedony/jadeite/nephrite) or glass/resin.

Chert (Flint Arrowhead)

Silicon Dioxide (SiO2)

Flint or chert, possibly a knapped stone tool

Microcrystalline quartz (SiO₂), commonly chalcedony with possible carbonaceous impurities