Lava stone was used by American Indians when entering battle for its qualities of strength and clarity. It’s believed to provide strength (physical and mental) when facing difficult situations.

The white howlite stone is believed to help teach patience, and overcome self criticism. It is also a very calming stone used to relieve stress of all kinds. It makes an excellent antidote to insomnia due to an overactive mind.
Zodiac - Gemini 
Element - Air