1. Worry stones are a smooth polished gemstone that is typically oval shaped, it is handcrafted and features an area of indention for your thumb. Worry stones work by using a form of reflexology or nerve pressure that when rubbed promotes a feeling of calm and relaxation, crystal healing, psychic energy, willingness, positive energy, calm, strength, health, prosperity, protection from negative energy. 2. Multiple Use: These stones are the perfect size to hold in your hand and each one has an indentation for your thumb. You can use thumb stones in lots of different ways:get positive energy,chakra balancing, crystal healing, smoothing vibrations, meditation, success, prosperity, peace of mind, power, crystal therapy, protection, fashion jewelry, etc. 3. For hundreds of years, natural crystals from the earth have been used for meditation, healing and psychic divination. Please Note: due to the nature of gemstones, carvings may slightly vary in size, color, and shape. 4. Pocket Stones -- Carry this worry stone easily in your pocket, perfect to hold in hands, daily carry, wrap, place in grids or anywhere else you like. 5. Best Mind Stones -- The best gift choice is for families, friends, gemstone collectors or someone who is full of positive energy and removes all negative vibrations. Great for crystal collectors, birthstone collector, housewarming gift and decorative stones. Specifications: Name: 7 Chakra Thumb Stone Weight: 15-17g Type: Thumb Stone, Worry Stone, Pocket Stone Colour: Multicolor Material: crystal Size: 40 x 30mm Package Contents: 1 x 7 Chakra Thumb Stone Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.