1. Polished Gems: Gem turning is a very popular hobby among both children and adults! This professional gem grinder is both fun and easy to use. Thanks to its user - friendly and durable design, it can easily transform rough gems into beautifully cut ones. It can turn and polish any rough gem into a super shiny and beautiful one. Timer Function: The durable motor has a timer setting, so you can set it and don't have to worry about forgetting it. It has a 7 - day digital timer (with an automatic shut - off function), and you can set and repeat it as needed until you get the perfect gem. Grinding and polishing take a long time, so it requires time and patience. Dimensions: 21 x 14.5 x 16.6 cm. 2. Fun DIY: Children can collect various stones outdoors and turn them into beautiful and charming ones. During the operation, children can experience the joy of labor, enjoy a sense of accomplishment, and stimulate their curiosity and observation skills. The detailed instructions on the glass will guide you through the turning process step by step and include interesting knowledge about the gems in the set. 3. It is suitable not only for children but also for adults. Therefore, it is a fun and high - quality handicraft tool for children and families. It is definitely an excellent gift for Christmas and Children's Day. The stone grinder can increase children's interest in geography and science and cultivate their patience. Easy to Use: The stone grinder set is easy to use and is very suitable for beginners. The educational game set contains detailed instructions on the process of rough stone grinding. 4. Packaging: 1 stone grinding drum, 1 green stone (rolled), 4 types of polishing powder (coarse grinding, fine grinding, polishing, final polishing), 2 rings, 1 necklace + gem holder, 1 keychain, 1 belt (replacement), 1 power cord with a European plug, 1 English instruction manual. We offer 24/7 after - sales service based on the customer - service concept. No matter where you are and what problems you encounter, we will solve them for you as soon as possible to ensure a worry - free shopping experience.