Deburring is a treatment in which products are lightly sanded or ‘tumbled’ while a preservative is applied to them, they are finally dried. This is a perfect treatment for smaller products, where the sharp edges/burrs must be removed.

A spiratron performs this post-treatment. This machine vibrates at high speed imparting a swirling motion to small stones. A preservative is added that reaches every surface. After this, the products are fed to a dryer that dries the products to achieve a perfect finish.