This is a set of 5 reliable incandescent penlights planned and sold by the parent company of the company that hosts the "Mineral Marche" events nationwide. ✨3 Great Deals!✨ 1. Special Discount (▲50 yen per penlight compared to buying through regular channels) 2. Case with a loose gemstone (1 from the photos, the specific gemstone will be a surprise) 3. Batteries included (2 AAA batteries per penlight) Shipping will be via Nekopos, and will be delivered to your mailbox. "Incandescent lights" are essential for observing "color change stones" such as some alexandrites and garnets. Incandescent bulbs contain less ultraviolet light than fluorescent lights, allowing you to accurately observe the true colors of the stones. A loose blue zircon will be included as a bonus (obtained at Mineral Marche; authenticity and treatment status are unknown). Which of the gemstones in the photos you will receive is a surprise! This is a recommended item for checking your collection or as a first-time gemstone observation tool. Please take advantage of this opportunity. Due to near-zero profit, please refrain from negotiating discounts. [Additional Information] Also listed on Yahoo! Auctions. Due to shipping costs, it's priced 10 yen cheaper than on Mercari! If you're interested, search for the same title on Yahoo! Auctions. Also, Yahoo! Auctions is distributing a "50% off coupon (with a limit)" for first-time users, so it's especially advantageous for first-timers!