Step into your power with these large African tumble stones, crafted from deep, captivating Black Onyx. Formed in volcanic rocks, this striking variety of chalcedony takes its fierce name from the Greek word for ‘claw’, symbolising its sharp beauty and resilience. Widely celebrated as the ultimate ‘stone of inner strength’, these crystals are believed to provide powerful protection, boost your determination and keep you deeply grounded. Measuring approximately 30 to 50 mm each, they are the ideal size to carry with you for confidence, place on your desk for focus, or hold during your daily mindfulness practices.