Anthropogenic (Man Made Material Processed By Nature)

Slag

Anthropogenic Vitrophyre (Iron or Smelting Slag)

Crushed stone aggregate

Mixed lithic aggregate; individual fragments cannot be identified from the image

Blue goldstone beads

Man-made aventurine glass (silica glass with metallic copper inclusions), not natural lapis lazuli

Blue glassy cabochon, likely blue quartz or synthetic glass

Possibly dyed blue chalcedony/quartz (SiO₂); visual identification is inconclusive

Fluorite (Polished Point/Tower)

Calcium Fluoride (CaF2)

Mixed beach-stone and tumbled-glass collection

Predominantly uncertain rocks (likely basalt, granite, and quartz-bearing stones) with anthropogenic glass; one possible banded agate or jasper

Red glass-like crystal, likely synthetic ruby or red glass

Uncertain from image; possible corundum (ruby), Al₂O₃, or synthetic glass

Chert Arrowhead

Microcrystalline Quartz (SiO2)

Polished/tumbled brown-and-white mineral fragment

Indeterminate; possibly quartz-rich jasper, brecciated jasper, or an iron-stained quartz mineral

Clear quartz tumbled stone

Quartz (silicon dioxide, SiO₂)

Quartz with Muscovite Mica

Silicon Dioxide (SiO2) with Potassium Aluminum Silicate Hydroxide Fluoride (KAl2(AlSi3O10)(F,OH)2)

Chert (Chalcedony/Agate variety)

Silicon Dioxide (SiO2)

Slag (Industrial Byproduct)

Ferro-silicate glass (Slag)

Agate (specifically, multi-colored or pastel-dyed agate)

Silicon dioxide (SiO2) - specifically, a cryptocrystalline variety of quartz known as Chalcedony, with banding classified as Agate. (If it were Fluorite, the chemical formula would be Calcium Fluoride - CaF2).

Tumbled brown banded jasper

Microcrystalline quartz (SiO₂), commonly chalcedony with iron-oxide inclusions

Beaded bracelet, likely green aventurine and yellow citrine or dyed quartz

Quartz, SiO₂ (green aventurine may contain fuchsite inclusions)

Opalite

Synthetic Opalised Glass

Milky quartz (likely quartz crystal fragment)

Quartz, silicon dioxide (SiO₂)

Iron-rich concretion or slag-like mineral fragment

Likely limonite/goethite (FeO(OH)·nH₂O), possibly magnetite-bearing material

Iron-oxide-stained rock, possibly limonite-rich ore

Likely limonite/goethite-rich material; exact identification requires testing

Green Aventurine

Quartzite with Fuchsite inclusions (SiO2 + K(Al,Cr)2(AlSi3O10)(OH)2)

Quartz crystal (likely clear quartz)

Quartz, silicon dioxide (SiO₂)

Chert Concretion (with typical hematite/limonite staining)

Sedimentary Concretion (SiO2 with FeO(OH)⋅nH2O)

Sandstone Concretion

Clastic Sedimentary Rock (primarily SiO2 with mineral cement)

Pyrite Concretion (Grapestone)

Iron Sulfide (FeS2) Concretion

Slag

Ferrous Slag (Siliceous industrial waste)

Black Obsidian

Amorphous volcanic glass (SiO2 + impurities)

Pumice (likely)

Vesicular volcanic glass, typically rhyolitic or dacitic in composition

Hematite

Iron(III) oxide (Fe2O3)

Unidentified gray mineral/rock fragment

Indeterminate from image; possibly quartz-rich material or mica-bearing schist

Porcelain (Kaolin-based)

Alumina silicate ceramic (composed primarily of Kaolinite: Al2Si2O5(OH)4)

Green Slag Glass

Amorphous Silicon Dioxide (with metallic impurities)

Possible ironstone concretion

Iron-oxide-rich concretion, likely hematite/goethite; exact identification is uncertain from the photo

Silicon Carbide (Carborundum)

Moissanite (SiC)

Synthetic Costume Glove (Paws)

Polyethylene terephthalate (Polyester) & Polyurethane blend

Slate

Slate (foliated metamorphic rock)

Chrysocolla-rich copper ore

Chrysocolla, a hydrated copper silicate; composition is variable and commonly mixed with quartz or copper oxides

Chert (often called Flint in archaeological contexts)

Microcrystalline or cryptocrystalline Silica (SiO2)

Blue tumbled glass-like specimen; likely blue slag glass

Likely man-made glass (silicate glass), not a natural mineral; exact material cannot be confirmed from the image

Polished silver sheen obsidian heart

Obsidian (volcanic glass), primarily rhyolitic silica-rich glass

Blue glassy tumbled stone, likely blue chalcedony or slag glass

Chalcedony (microcrystalline SiO₂), possibly man-made blue glass

Chert (Arrowhead Fragment)

Microcrystalline Quartz (SiO2)