Blue-dyed Quartz Druzy
Silicon Dioxide (SiO2) with artificial pigment
mineral
Category
Man Made Material, Not A Natural Rock Or Mineral Specimen
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Polished citrine quartz point
Quartz, silicon dioxide (SiO₂), yellow-orange variety commonly sold as citrine; possibly heat-treated amethyst
mineral
Sandstone
Sandstone (Sedimentary rock composed of silicate grains)
sedimentary
Iron-rich slag or limonite-bearing rock
Hydrated iron oxides, chiefly limonite/goethite (FeO(OH)·nH₂O); possibly industrial iron slag
mineral
Vuggy Limestone
Carbonate Sedimentary Rock with Vuggy Porosity (CaCO3)
sedimentary
Sandstone
Arenite (SiO2 based)
sedimentary
Chalk
Calcium Carbonate (CaCO3)
sedimentary
Carnelian/chalcedony rough
Microcrystalline quartz (SiO₂), iron-oxide-colored chalcedony
mineral
Tumbled tree agate (dendritic agate)
Cryptocrystalline quartz, SiO₂, with manganese/iron-oxide dendrites
mineral
Sandstone
Arenite (SiO2 based)
sedimentary
Ferrochrome Slag
Anthropogenic slag (Fe-Cr alloy waste)
industrial byproduct
Diamond (or Diamond Simulant)
Carbon (C)
mineral
Decorative polished pebbles
Likely mixed quartz-rich lithologies, including quartzite, jasper, and/or basalt
mineral
Turquoise
Hydrated copper aluminum phosphate, CuAl₆(PO₄)₄(OH)₈·4H₂O
mineral
Blue Goldstone
Synthetic Aventurescent Glass (Cobalt-doped soda-lime glass)
man-made glass
Sandstone
Arenite (predominantly SiO2)
sedimentary
Yellow quartz, possibly citrine
Quartz (SiO₂), yellow variety likely citrine; may also be iron-stained quartz
mineral
Tumbled blue-green stone, likely aquamarine-bearing pegmatite or blue apatite
Probable fluorapatite, Ca5(PO4)3(F,Cl,OH), though visual identification is uncertain
mineral
Goldstone
Not a natural mineral or rock. It is an ornamental glass.
Manufactured Glass (Simulant)
Dyed Chalcedony (Agate)
Silicon Dioxide (SiO2) with artificial pigment
mineral
Sandstone
Arenite (Siliclastic sedimentary rock)
sedimentary
Shale
Laminated Mudstone
sedimentary
Sandstone
Arenite (primarily SiO2)
sedimentary
Sandstone
Arenite (predominantly SiO2)
sedimentary
Sandstone
Arenite (SiO2 principal)
sedimentary
Sandstone (likely Quartzose Sandstone)
Arenite (primarily SiO2)
sedimentary
Sandstone (Quartzose Sandstone)
Arenite (composed primarily of SiO2)
sedimentary
Clear quartz crystal
Quartz (silicon dioxide, SiO₂)
mineral
Chert (Yellow Jasper/Flint)
Microcrystalline Quartz (SiO2)
sedimentary
Turquoise
CuAl6(PO4)4(OH)8·4H2O
mineral
Sandstone
Arenite (composed primarily of SiO2)
sedimentary
Chert
Microcrystalline Quartz (SiO2)
sedimentary
Quartzite
Quartzite (SiO2)
metamorphic
Banded Sedimentary Rock
Sedimentary rock with Liesegang banding
sedimentary
Sandstone (with Iron Staining)
Arenite (composed primarily of SiO2 with Fe2O3 staining)
sedimentary
Sapphire
Corundum (Al2O3)
gemstone
Red Sandstone
Arenite (Fe2O3 enriched)
sedimentary
Sandstone
Arenite
sedimentary
Sandstone (River Stone)
Arenite (composed primarily of SiO2)
sedimentary
Quartzite
Quartzite (SiO2)
metamorphic
Brecciated Red Jasper
Microcrystalline Quartz (Chalcedony), SiO2
sedimentary
Quartz (Engineered Quartz Surface)
Silicon Dioxide (SiO2) based composite
mineral (man-made composite)