Hello sir, the full gemstone group, such as diamonds, has certificates. because they are both scarce in nature and precious stones. In semi-precious natural stones, unfortunately in our country, the Certificate business is a piece of paper printed from printing houses known as a marketing strategy without any approval of authenticity. When you search it on the internet, you will get that text. Our products are stone and you can define them as high or low quality according to you. It is also beneficial for you to know which official institution has approved the product you will buy, especially for products with certificates. Our stones are real stones, you may or may not like them in terms of quality.