Associated with the Crown chakra
Found in Russia, this is the "regular" shungite that is made of 30-50% carbon.  Great shielding stone that helps to eliminate EMFs and negative energy.  Great to place around electronics in the home.  Helps to purify emotions and can have anti-inflammatory and anti-histamine effects on the body
 
This listing is for 1 tumbled stone intuitively chosen by me.