1. Polish your own gemstones: Stone turning is a popular hobby for children and adults. This professional stone grinder is fun and easy to use, facilitating the transformation of rough stones into beautifully cut gemstones. It has a user - friendly and durable design, capable of turning any rough stone and polishing it into shiny and beautiful gemstones.- Timer function: The durable motor has a timer setting. You can set it and needn't worry if you forget. It has a 7 - day digital timer (with auto - off function). You can set it and repeat according to your needs until you get your own beautiful gemstone. Note that grinding and polishing take a lot of time, so it requires time and patience.- Size: 21 x 14.5 x 16.6 cm.2. Fun DIY: Children can collect various stones outdoors and turn them into attractive stones. During the operation, children can experience the joy of work, enjoy a sense of success, and promote curiosity and observation. Detailed instructions on the glass will guide you through the turning process step by step, including interesting facts about the gemstones in the set.3. Suitable for both children and adults, it is a fun craft tool for children and families. It can be a great gift for Christmas and Children's Day. The stone mill can increase children's interest in geography and science and cultivate children's patience.4. Easy to use: The stone turning set is easy to operate and suitable for beginners. The educational game set includes detailed instructions on the process of grinding rough stone.5. Package:- 1 x stone tumbler- 1 x green stone (in a roll)- 4 kinds of (coarse grinding, fine grinding, polishing, final polishing) polishing powder- 2 x rings- 1 x necklace + gemstone holder- 1 x key chain- 1 x leather strap (replacement)- 1 x power cord with Euro plug- 1 x English instructions6. We provide 24/7 after - sales service based on the concept of customer service. No matter where you are and what problems you encounter, we will solve them for you as soon as possible to make your shopping experience worry - free.