Not A Natural Rock (Man Made Composite)

Sandstone Concretion

Septarian or Carbonate-cemented Sandstone Concretion

Boxwork or Septarian Concretion

Septarian nodule / Boxwork weathering

Hematite

Iron(III) oxide (Fe2O3)

Blue glassy fragment among beach gravel

Likely cobalt-blue man-made glass; not a natural mineral specimen

Sandstone (with man-made markings)

Arenite (composed primarily of Quartz, SiO2)

Turquoise (likely stabilized or composite)

Turquoise, hydrated copper aluminum phosphate — CuAl₆(PO₄)₄(OH)₈·4H₂O

Dyed Quartz Geode

Silicon Dioxide (SiO2) with artificial pigment

Sandstone (with concrete/human-made layer)

Clastic Sedimentary Rock (primarily Quartz/Feldspar grains)

Slag

Metallurgical by-product

Blue chalcedony (likely dyed or treated)

Microcrystalline quartz, SiO₂ (chalcedony)

Diamond

Native Carbon (C)

Tumbled milky quartz

Quartz (silicon dioxide, SiO₂)

Blue sea glass or blue glassy mineral fragment

Uncertain; likely man-made soda-lime glass, not a natural mineral

Conglomerate

Conglomerate Rock (Paraconglomerate)

Quartz pebble (Quartztite fragment)

Silicon Dioxide (SiO2)

Weathered iron-rich concretion or ironstone nodule

Goethite–hematite limonite concretion (FeO(OH), Fe₂O₃, and hydrated iron oxides)

Tumbled milky chalcedony (likely common opalite-like quartz)

Chalcedony, microcrystalline SiO₂; possibly pale common opal, hydrated SiO₂·nH₂O

Opalite

Man-made synthetic glass with opalescent effects (SiO2 + metal oxides)

Blue-green faceted gemstone, likely turquoise or treated turquoise

Turquoise: hydrated copper–aluminum phosphate, CuAl₆(PO₄)₄(OH)₈·4H₂O; exact identification is uncertain from the image

Gold ring with a dark, possibly gemstone setting

Gold alloy; the dark setting is not identifiable from the image

Stainless Steel (Polished)

Ferrous Alloy containing Iron (Fe), Chromium (Cr), and Carbon (C)

Clear quartz sphere

Quartz (silicon dioxide, SiO₂)

Blue-green chrysocolla rough specimen

Chrysocolla, hydrated copper aluminosilicate; commonly associated with malachite, quartz, and limonite

Decorative orb of likely sodalite-bearing rock or dyed stone

Most consistent with sodalite-rich nepheline syenite or a blue-and-white composite; exact identification requires testing

Man-made Dyed Aura Quartz

Silicon Dioxide (SiO2) with metallic coating/dye

Opalite

Synthetic Opalised Glass

Opal ring

Common opal, likely synthetic or assembled blue-green opal (hydrated amorphous silica, SiO₂·nH₂O)

Chert Concretion

Chert (Microcrystalline Quartz, SiO2)

Asphalt (Bituminous pavement)

Bituminous concrete / Asphalt

Turquoise-style beaded bracelet

Turquoise, hydrated copper–aluminum phosphate: CuAl₆(PO₄)₄(OH)₈·4H₂O; possibly dyed or composite beads

Blue goldstone

Man-made aventurine glass containing metallic copper particles; not a natural mineral

Tumbled milky quartz pebble

Quartz (silicon dioxide, SiO₂)

Diamond

Carbon (C)

Onyx (Black) and Mother of Pearl Inlay

Silicon Dioxide (SiO2) for Onyx; Aragonite (CaCO3) for Mother of Pearl

Engineered Quartz

Silicon dioxide composite

Pyrite in Quartz (Drill Core)

Silicon Dioxide (SiO2) with Iron Sulfide (FeS2) inclusions

Slag Glass (Cullet)

Amorphous Silica (man-made), primarily SiO2 with trace metal oxides

Tumbled clear quartz (rock crystal)

Quartz, silicon dioxide (SiO₂)

Goldstone

Man-made glass with copper inclusions

Dyed Crackle Quartz

Silicon Dioxide (SiO2) with synthetic dye

Gemstone-set ring, likely cubic zirconia or diamond

Likely synthetic cubic zirconia (zirconium dioxide, ZrO₂); stones may alternatively be diamond (carbon, C)

Possible basalt or industrial iron-rich slag

Basalt (plagioclase–pyroxene rock); identification uncertain from image