Stone is 100% natural and manufactured in my factory. In case a customer needs a certification, it can be done, but the customer needs to tell us in advance by messaging in the etsy app. The cost of certification is to be paid by the customer. It comes to around $15 per piece when we get it tested at gtl (gem testing laboratory, jaipur) the oldest and best testing lab in jaipur, the gemstone capital of the world. This item is made of minerals and natural rough.