May birthstone The luscious Green Chalcedony is known as the nurturing gemstone, promoting brotherhood, good will and alleviating hostility. Highly recommended for the rush hour commuter, and generally around the workplace. Please note, natural gemstones may vary in colour. Rhodium-Plated, Stainless Steel 6mm bezel set trillion cut Green Onyx Ethically sourced natural gemstone Charm measures 6x8mm Box chain length 16" (40.5cm), extends to 18" (45.5 cm)