NATURAL CRYSTAL: The worry stone is composed of 7 kinds of chakra crystals, which are amethyst,lapis lazuli,sodalite,green aventurine,tiger eye,yellow jade,red jasper. These healing crystals come from beautiful nature and has been strictly selected. The gemstones is very strong and will not be easily damaged. RELIEVE ANXIETY: It is designed according to the size of the thumb, so it is also called the thumb stones (palm stones, worry stones) . The groove in the middle is very suitable for thumb rubbing to used for relaxation or anxiety relief. CONVENIENT TO CARRY: The size of our oval pocket stone is 35mmx45mm, you can't even feel it in your pocket, very portable, the crystal is very sturdy and well polished and will not be easily damaged. Please Note: due to the nature of gemstones, carvings may slightly vary in size, color, and shape. MULTIPLE USES: In addition to using it to relieve anxiety, you can also use it to meditate. Its 7 colors. With it's power, this gemstones for anxiety therapy enhance meditation and help heal the mind, body and spirit, fill positive energy and eliminate all negative vibrations. AS A GIFT: It is a good gift, each kind of crystal corresponds to different wheel of 7 chakra in our body. Use this 7 chakra worry stone to calm your emotions and help your body's metabolic system drain excess toxins, which make it a great gift for birthday, Christmas, anniversary for mother, father, him, her, man, woman, etc..