This is a reliable penlight planned and sold by the parent company of the company that hosts the "Mineral Marche" events nationwide. ✨Three Benefits!✨ 1. Special Discount (▲50 yen cheaper than buying through the official channels) 2. Case with loose gemstone or rough stone (one from the photos, you can't choose which one) 3. Batteries included (2 AAA batteries) Shipping will be via Yu-Packet Post Mini and will be completed by posting to your mailbox. An "incandescent light" is essential for observing "color change stones" such as some alexandrite and garnet. Incandescent light bulbs contain less ultraviolet light than fluorescent lights, so you can correctly observe the color of the stones. The loose gemstones and rough stones are extras (obtained at Mineral Marche or crane games, and the authenticity and treatment of the gemstones are unknown). There are garnet, amethyst, emerald, peridot, citrine, tourmaline, and ruby. We will include the loose gemstones and rough stones selected by us, so you'll have to wait and see what you get. This is a recommended item for checking your collection or as a first-time gemstone observation tool. Please take this opportunity to get one. We are offering this at almost zero profit, so please refrain from price negotiations. Discounts are possible for bulk sales of 5 or more (a small discount). [Additional Information] We are also listing this on Yahoo! Auctions. Due to shipping costs, it is priced 10 yen cheaper than on Mercari! If you are interested, please search for it on Yahoo! Auctions using the same title. Also, Yahoo! Auctions is distributing a "50% off coupon (with a limit)" for first-time users, so it's especially advantageous for first-time buyers!