※Warning It seems that a considerable number of substandard products are circulating. There are reports of bursting and even toxic materials, so please be careful if you are considering purchasing sauna stones. This information comes from buyers. Basically, items are shipped on Sundays! #Niwachi /#Kiryokugan /#Kiryokugan25kg Tap the blue text → Check "Only show items for sale" in the upper left You can see the Niwachi products currently for sale. I run a garden business in Shizuoka Prefecture. I also make soil, etc. ^ ^ Thank you for your support. ~Product Introduction~ 【Product Name】 Kiryokugan (igneous rock) (approx. 50-150mm) 【Description】 ※Please wash before use. The best rocks for sauna stones are plutonic rocks, which are igneous rocks that have cooled deep underground over a long period of time. These sauna stones are composed of gabbro, a plutonic rock, and Kiryokugan, a hypabyssal rock. Plutonic rocks have a higher density than volcanic rocks like basalt, and are high-quality sauna stones that are resistant to heat and do not deform easily. ※General rocks found in riverbeds may crack or burst due to heat, and are not suitable for sauna stones. We recommend replacing them once a year if used weekly. △Notes△ ※The size of the stones will be random. The quantity will vary depending on the size. Due to shipping constraints, we will pack approximately 25kg, slightly less. ※The product images are representative photos, so please expect something similar to the images. ※We will pack them directly in recycled cardboard boxes, so the boxes may be distorted. Please understand. ※We do not accept any complaints regarding the size or color of the stones. ※We have tested the durability of the stones, but we are not responsible for any effects on the human body or accidents caused by their use after purchase. Please understand. Olivine Sauna Stones Basalt Koka Stone ◎◎Currently Available Products◎◎ Cactus • Succulents Mixed Soil 1•2•5•15 •30ℓ Pumice Small Grain (4~10mm) 1•2ℓ Vegetable Compost Soil Improver 1•2ℓ Kanuma Soil Small Grain 1•2ℓ Akadama Soil Small Grain 1•2ℓ Fuji Sand Small to Medium Grain 1•2kg Granular Zeolite 1•2ℓ Hyuga Soil 1•2ℓ Gifu Stone 100-250mm 12kg•25kg Shinshiro Rust Crushed Stone 25kg