Origin: Shunga, a village in Karelia, Russia Description: Shungite is a powerful stone to use for meditation because it helps with focus and calming the mind. Shungite reduces stress and alleviates anxiety, it also balances and rejuvenates your energy field. Shungite is known to minimize the effects of EMF created by your electronics and neutralize harmful and negative energies. Chemical Composition: CO3 Chakra: Root 5cmApproximate Size of 1 cube: 5cm x 5cm x 5cmApproximate Weight of 1 cube: 340g 10cmApproximate Size of 1 cube: 10cm x 10cm x 10cmApproximate Weight of 1 cube: 2.3kg We do our best to buy quality products- although not every rock is the same. If you choose to purchase the "staff pick option", we will select the best of the batch for you. Otherwise, it will be at random from the larger batch we have in stock.