Welcome to "Hokutolite [Genuine from Akita] from Tamagawa Onsen"!! ☆ We are selling 590 grams of Hokutolite shown in images 1-13 ☆ ✨ It's heavy and has beautiful striped patterns. ✨ The radiation level is also excellent, with a maximum of 12.66 micro sieverts confirmed ✨ ☆★ Genuine Tamagawa Onsen Hokutolite of this size is rarely available. It is very rare ★☆ ◆ It is a versatile Hokutolite that can be displayed and appreciated as a work of art, and can also be used for drinking water and bathing ✨ It is extremely difficult to obtain, so some people purchase it for investment purposes. ☆ If you want to make radium water for drinking, with 590 grams, you can easily make 2 liters by leaving it in the refrigerator overnight ✨ 〈For reference〉 When using it for bathing, it is said that around 700-1000 grams of Hokutolite is needed for a 200-liter bathtub. You can have it inspected and radiation measured anywhere. It is definitely genuine Tamagawa Onsen Hokutolite. ★★《Please Note》★★ The Geiger counter in the image is a US SE Inc. Inspector Plus. It detects alpha, beta, gamma, and X-rays with high sensitivity. Simple counters that only detect gamma rays are sold online, etc. They have fewer supported radiation types and display smaller values. ♨ I have borrowed various types of counters at the Tamagawa Onsen site and compared the measurements. The simple counters showed smaller values. ◆ The seller, who was born in Akita, is selling Hokutolite collected before it was designated as a natural monument, inherited from their great-grandfather. ● You may be worried about purchasing, but we weigh and measure the radiation level just before shipping, and we record a video before shipping. We provide the video free of charge upon request. ＊ You can also purchase it after we measure the radiation level in front of you and hand it over. Please see, touch, and measure it to confirm that it is genuine before purchasing. "Hokutolite" is a precious mineral found in only two places in the world: "Tamagawa Onsen, Akita Prefecture" and "Beitou Hot Spring, Taiwan." ♨ There are many notices about Hokutolite at the Tamagawa Onsen site. I have posted several images of the site. ◎ Shipping Method "Yu-Packet Plus" anonymous delivery. You can use the tracking service. You don't have to worry about "I paid, but it didn't arrive!" ◎ Other ・No claims or returns are accepted unless there are false statements in the description or images. ・We usually ship within the next day, but it may take 4-5 days. ・Please report receipt after arrival. ★ We have other items for sale too!!