Malachite is associated with the heart chakra. It is a toxic stone, so be careful when handling raw or fibrous malachite. These measure approximately between 1.77-2.5” each. The individual sizes are on the tags in the videos These are natural and not synthetic malachite. Check the photos for measurement next to a quarter, which is approximately one inch. The picture shows the quality of the item you will receive. The individual colors and size may vary. The price listed is for one tower.