Natural Agate is heavily associated with grounding, use it in meditation in order to bring your higher mind and spirituality back down to earth, keeping yourself grounded in the physical realm.
Amethyst is a relaxing stone, use it to calm you and help put your anxieties to rest. It is also strongly associated with improved, healthier sleep. Use it to stimulate the third eye and crown chakra.
Dimensions: 8.2 x 7.2cm + 664g