Thank you for viewing my items from among the many products listed. I believe this is valuable as it is no longer quarried. I couldn't take good photos, but the color is a bit lighter and more beautiful in person. W 10 cm, H 8 mm approx. Material: Shakudani Stone Product Information from the Website: Currently, Shakudani stone is not being quarried. Along with this, Shakudani stone, which has been passed down since the Kofun period, is about to be forgotten from people's memories. In order to convey such a disappearing stone culture unique to Fukui to future generations, the "Revival Shakudani Stone Fukui's Radiance" series was born. Collecting Shakudani stone that was dormant in old private houses in the prefecture and regenerating it as " ". We sincerely hope that the newly reborn Shakudani stone will once again breathe life into people's lives and be passed on to the future. Shakudani stone is a volcanic tuff that was formed by the accumulation of ash from volcanic activity about 16 million years ago. It was mainly quarried in the area of Mt. Asuwa in Fukui City, Fukui Prefecture, and the stone quality of the Shakudani district on the northwest side of the mountain foot was particularly excellent, hence the name Shakudani stone. Also, because it changes to a deep blue color when wet, it is also called "Blue Stone," and those with a light blue color and fine texture are considered to be of high quality. *Because we process natural stone, please be aware that the pattern and texture of the product you receive may differ slightly from the photos.