Blue Chalcedony helps one be open minded and accepting. Helps with communication and listening. Blue Chalcedony opens and balances the throat chakra. It also assists with mucus membranes and the immune system. Helps with blood pressure and helps heal the lungs. Metaphysical properties are provided for your information and are not meant to replace the advice of a qualified physician or medical practitioner. Due to the nature of this product, color, size, and shape will vary. Quarter is used for size reference.