Lasers are useful for targeted healing. These lasers are approximately 2-3" Amethyst is a powerful healing stone. Supports the crown chakra Known as the "sobriety stone" Amethyst is extremely helpful for addictions and supports sobriety. It helps with nightmares and insomnia, bringing a more restful sleep. Amethyst cleanses the organs, reduces swelling, helps with headaches, and assists the digestive track. 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.