Taiwanese serpentine jade, a semi-precious stone native to Hualien, belongs to the same mineral family as serpentine stone. Formed over hundreds of millions of years, this emerald green stone has unique light transmission properties, a high magnetic field, and hydrogen and oxygen free radicals that purify the air and that are beneficial for the health. Regarding the origin, if the serpentine jade cup was carefully polished during its production, then when it is illuminated by the light, one can see a clear, emerald green light through the cup.