Anthropogenic (Man Made Material Processed By Nature)

Tiger’s eye beads

Tiger’s eye (quartz variety), SiO₂, with pseudomorphic fibrous crocidolite/goethite inclusions

Raw quartz crystal

Quartz (silicon dioxide, SiO₂), likely milky or included quartz

Ferrochrome Slag

Industrial Glassy Slag (Fe-Cr alloy byproduct)

Carnelian (red-orange chalcedony) beads

Microcrystalline quartz, SiO₂; chalcedony colored chiefly by iron oxides

Metallic sulfide mineral fragment, likely galena

Galena (lead sulfide, PbS), tentative identification

Chert (Arrowhead/Tool variety)

Microcrystalline Quartz (SiO2)

Carved translucent jade pendant

Likely nephrite jade (actinolite–tremolite series); possibly jadeite or chalcedony, identification requires testing

Gypsum Wallboard (Drywall)

Hydrous calcium sulfate (CaSO4·2H2O)

Chert

Microcrystalline quartz (SiO2)

Polished ocean jasper / orbicular jasper

Microcrystalline quartz (SiO₂), commonly with chalcedony, feldspar, and iron/manganese oxides

Jasper

Jasper (Silicified microcrystalline quartz) - SiO2

Quartz with Basalt inclusion

Silicon Dioxide (SiO2) with mafic silicate rock

Green glassy gemstone-like specimen

Likely synthetic glass or treated quartz; exact identification requires testing

Dyed Blue Agate Slice

Silicon Dioxide (SiO2)

Sandstone (with Iron Staining)

Sandstone (mainly Quartz, SiO2, with Iron Oxides like Goethite/Hematite)

Gold-bearing quartz in a dark host rock (possible gold-in-quartz specimen)

Quartz (SiO₂) with possible native gold (Au) in a fine-grained host; exact identification is uncertain from the photo

Turquoise (rough, likely stabilized or treated)

Turquoise, CuAl₆(PO₄)₄(OH)₈·4H₂O

Green faceted bead strand, likely dyed or synthetic material

Uncertain; possibly green-dyed quartz, glass, or lab-created emerald-like material

Tumbled Tiger’s Eye

Quartz variety, fibrous SiO₂ with crocidolite pseudomorphs

Aventurine

Quartz containing inclusions of Fuchsite (SiO2 + K(Al,Cr)2AlSi3O10(OH)2)

Goldstone (Red/Brown)

Aventurine Glass (SiO2 with Copper inclusions)

Decorative polished pebbles

Likely mixed quartz-rich lithologies, including quartzite, jasper, and/or basalt

Tumbled black obsidian (likely)

Volcanic glass; chiefly silica-rich rhyolitic glass (SiO₂)

White marble chips

Marble; predominantly calcite (CaCO₃)

Colorless faceted quartz-like gemstone

Likely quartz (SiO₂), though the appearance may also indicate man-made glass or cubic zirconia

Blue Slag Glass

Amorphous Silica (Byproduct of smelting)

Blue glass-like heart pendant, likely synthetic blue spinel or colored glass

Unconfirmed; possibly synthetic spinel (MgAl₂O₄) or cobalt-colored glass

Rose quartz (likely)

Quartz, silicon dioxide (SiO₂), cryptocrystalline to crystalline variety

Unidentified dark, flat specimen

Indeterminate; image resolution is insufficient for mineral identification

Tumbled pale green aventurine or chalcedony

Quartz-group silica, primarily microcrystalline SiO₂; possible fuchsite-bearing aventurine

Blue Aragonite

Aragonite (Calcium Carbonate, CaCO3)

Manufactured stone veneer wall

Likely cut limestone or sandstone masonry blocks; exact lithology is indeterminate from the image

Chintz

Microcrystalline Quartz (SiO2)

Carved pale green jade-like pendant

Likely nephrite jade (tremolite–actinolite amphibole); possibly serpentine or treated aventurine

Chert Arrowhead

Microcrystalline Quartz (SiO2)

Tumbled green-yellow chalcedony (likely prehnite or serpentine)

Cryptocrystalline quartz (chalcedony), SiO₂; identification is uncertain from the photograph

Iron-rich concretion or slag-like rock

Goethite–hematite limonite concretion, possibly iron slag

Polished orbicular/porphyritic granite or breccia

Likely potassium-feldspar–quartz granite with amphibole/biotite and epidote; exact variety uncertain from the image

Black Tourmaline

Schorl (NaFe2+3Al6(Si6O18)(BO3)3(OH)4)

Synthetic Resin (Artificial Specimen)

Polyurethane or Polyester Resin

Chert

Microcrystalline Quartz (SiO2)

Chert Arrowhead

Cryptocrystalline microcrystalline Quartz (SiO2)