Onyx is a pure crystalline silica related to agate. It is formed by the movement of water.This Arancione Onyx has a peachy creamsicle tone, in natural light. But when you back light this beauty, it’s the intense orange that’s bursting with layers of deep reds. It looks like its almost imitating a river of steaming lava, flowing down the volcano. Or a beating red hot sun, shining down upon the earth. Wherever this is displayed, it will surely be a deluxe treat for those viewing this masterpiece.