This pyramid shape is a lead-free flat back fancy stone from Preciosa Crystal is a sparklingly sweet design element for jewelry, accessories, footwear, home decor and more. Machine cut genuine Czech crystal stones from Preciosa boast precise sizing and shape, along with highly durable coatings and foiling. Manufactured in accordance with the highest environmental and sustainable practices, these stones have less than 90ppm of lead and barium and meet the most stringent industry standards.