Quartz Crystal stone is believed to increase spiritual wisdom and insight, and promote clarity of thought. It’s also believed to increase one’s intuition and amplify prayers. In addition, Quartz Crystal is known to be good for treating headaches, dizziness and general pain relief, as well as healing emotional wounds. Clear Quartz is known as the "master healer" and will amplify energy and thought, as well as the effect of other crystals.
Chakras - Crown Chakra 
Zodiac - All Birthsigns 
Element – All (Earth/Fire/Air/Water)

The 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