Lapis lazuli :- Deep self knowledge.

Lapis has a hardness of 5 to 5.5 on mohs scale of hardness. It contains lazurite, calcite and pyrite.
Lapis is a metamorphic rock .Humans have used this crystal from ancient times. This is used for third eye and throat chakra . It helps to enhance mental power by activating pituitary gland  and also promotes clear understanding and intuition power . It is effective against depression , promotes bounding and strengthens idealism. It gives relief from migraine and headache . Lapis lazuli crystals overcomes hearing loss , purifies blood ,boosts immune system . it alleviates insomnia , vertigo and lowers blood pressure