Dypingdal Serpentine-magnesite deposit, Snarum, Modum, Buskerud, Norway

Mg₃Si₂O₅(OH)₄

The most common species of the serpentine subgroup are lizardite, chrysotile, and antigorite

Crystal System: trigonal (lizardite) or monoclinic (chrysotile, antigorite)
Colour: green, yellowish-green, white, yellow-brown, red-brown or black
Lustre: silky, waxy, vitreous
Habitus: microcrystalline, fibrous aggregates, massive
Hardness: 2.5 (lizardite, chrysotile), 3.5-4 (antigorite)
Fracture: uneven, splintery
Cleavage:perfect on {0001} in lizardite; good on {001} in antigorite
Density: 2.5-2.6 g/cm³
Origin and geological occurrence: serpentine occurs in hydrothermally-altered ultramafic rocks. Chrysotile and lizardite are low-T minerals, whereas antigorite is a high-T (T > 250°C) serpentine. Serpentine can also occur in metamorphosed impure dolostone

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Samples:

	9E.1 Serpentine Fibrous veins of chrysotile. Castagna tunnel, Libiola mine, Genova, Liguria #phyllosilicates
	9E.2 Serpentine Fibrous crystals of chrysotile with silky luster #phyllosilicates