Guarantee: All crystals are handpicked to ensure higher luster and greater density. Every piece will be checked again before sent out to you. Any question, professional after-sales service and solutions will be offered at first time. Please Note: Please kindly know that it’s made of natural crystal stones, some may contain natural pits, fissures or inclusions. Please allow for your natural and authentic stones to have different shapes, size, and colors from the images shown. Size: Per size: 1.25-2 inches (3cm-5cm). Per Weight: 25g-35g. It can be for tumbling DIY creativity, jewelry making, fountain rocks, protection, meditation, healing, chakra energy balancing, decoration. Color: All crystals we offered are great with higher luster, deeper color, and greater density. Our crystals could be a natural gift for yoga, meditation lovers, crystal collectors and friends for birthdays, christmas, children learning geology, home or office decoration. Natural: You will receive 1pcs authentic raw Black Obsidian stone. Black Obsidian is to be a powerful cleanser of psychic smog.