Size: Length 45-50cm 　　　　　　Thickness 4.1mm Terahertz ore is a silvery power stone similar to Gibeon and hematite, and it is said to be a stone that emits a frequency that vibrates about one trillion times per second. Terahertz waves are a type of electromagnetic wave that emits long frequencies, between 1 trillion Hz and 100 trillion Hz, with a wavelength of 3μm to 1000μm, and has the properties of both light and radio waves. It is attracting attention as a stone that has the effect of promoting beauty and health by promoting blood flow and relieving stiffness due to its vibration. According to NASA, these terahertz waves are "transmission wavelengths" that penetrate matter and reach human cells, so they have an activating effect, and research is currently underway around the world on this stone. We offer a discount of 200 yen for each item from the second item purchased. 2 items purchased: 200 yen discount 3 items purchased: 400 yen discount 4 items purchased: 600 yen discount Thank you! ❣️