Amphibole Quartz works with the crown and higher chakras. It has an angelic vibration, making Amphibole a gentle, calming stone. Amphibole Quartz promotes harmony and cooperation, making this stone good to carry or have in the work place. 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.