Serpentine subgroup
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Serpentine subgroup are greenish, brownish, or spotted minerals commonly found in serpentinite. They are used as a source of magnesium and asbestos, and as decorative stone. The name comes from the greenish color and smooth or scaly appearance from the Latin serpentinus, meaning "serpent rock".
Serpentine from Poland
Dish of serpentine with inlaid gold fish, 1st century BC to 1st century AD, with 9th-century mounts
Budai carved from serpentine, height 8 cm (3.1 in)
Kaolinite
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Kaolinite ( KAY-ə-lə-nyte, -lih-; also called kaolin) is a clay mineral, with the chemical composition Al2Si2O5(OH)4. It is a layered silicate mineral, with one tetrahedral sheet of silica (SiO4) linked through oxygen atoms to one octahedral sheet of alumina (AlO6).
Kaolinite structure, showing the interlayer hydrogen bonds
Kaolin mine in Czech Republic
A kaolin processing plant