Serpentine

Serpentine is a hydrated silicate of magnesium. It can contain three polymorphs: lizardite, chrysotile, and antigorite. Minerals of the serpentine roup occur in microcrystalline veins. of translucent waxy appearance. A product of regional metamorphism in a strongly aqueous environment, of magnesium - rich minerals, mainly olivine, but also pyroxenes and amphiboles.

Chemical composition Mg3si2O5(OH)4
Color greenish grey to grayish white, or green color.
Hardness 2.3 - 2.6 up to 5
Crystal system Orthorhombic or Monoclinic
Origin New Zealand, Korea, China, India. A very common mineral found all over the world.
Healing properties*

Serpentine can help with various disorders in all areas of the body. The emotional system and the mental structure. It can be used to clear the crowded areas of the charkas, and to stimulate the crown. An excellent stone for enhancing the meditative state.
Folklore

Light green serpentine is said to have been used in the breastplate of the high priests.