These worry stones are smooth and slightly indented for resting your thumb. Rubbing the smooth surface of the stone puts pressure on nerves within the thumb that may release endorphins, the brain's natural relaxant. Stones are approximately 1.5" x 1.25" Shungite: purity, clarity, cleansing, transformation Shungite can relieve emotional stress, neutralize negative energies, and even deflect electromagnetic waves. A good stone to have in your pocket with your phone. Serpentine: inner serenity, emotional repair and cleansing, energetic protection Serpentine is a useful stone for those who want to maintain the flexibility of perception. It can smooth away imprinted thought patterns and protect you from negative energies. Sodalite: creativity, emotional balance, communication, intellectual stimulation Sodalite supports a collaborative mindset and a secure sense of self. A great stone for minimizing anxiety at social events or for boosting your motivation while working on creative projects. Tiger Eye: courage, strength, protection from evil, stability Tiger Eye can give you a boost of confidence and vitality for physically or mentally demanding situations and for taking risks. Amethyst: healing, clarity, calm, cosmic energy Amethyst can nurture your spirit and heal Labradorite: freewill, creation, manifestation, focus Labradorite is an activating stone that motivates. Bloodstone: vitality, strength, courage, manifestation In the ancient world, warriors often carried Heliotrope, or bloodstone, as an amulet of protection and courage. It is believed to increase one's ability to perform with depth, purpose, and bravery. Hematite: security, stability, focus, confidence Hematite is a stabilizing stone that offers grounding energy and protection.