There are many art materials based on living creatures. The material that makes the living thing itself shine Raden is the only other type of mother-of-pearl inlays. The seven-color luster of the shell's nacreous layer illuminates a person's hidden inner nature, and it is in the darkness and light that raden increases its luster. It is as if it symbolizes the radiance, vitality, strength, and faint hope of a human being exposed to hardship. S ...