Quartz 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)

Lavender Quartz is a stone of love, healing and joy. It is actually a type of Rose Quartz with a high level of titanium or manganese within it (hence the colour, which is a sort of lilac pink.)
It is said to alleviate lack of self worth and low self esteem, and helps to assist with appreciating the things around you. It has a lovely positive effect on this the mind whilst dispelling mental blockages, but it also brings love and joy to the carrier.
On the physical level this stone positively influences the metabolism and blood circulation.