Beautiful semi-precious Iron Tiger gemstone worry stones. *Dimensions are approximately 50x40x10mm. *Approximately 29-30 calibrated Worry Stones per1kg. *All natural semi-precious gemstone. *Sold in 0.5kg increments. This picture is an representation of the type and quality of the gemstone you will be receiving. As you know, there are slight variations due to the natural character of this product.