"Mysterious Beauty: Deciphering the Mysteries of Black Agate" In contrast to black onyx, a kind of cryptocrystalline quartz, black agate often has a waxy shine and is translucent. Black Agate Jewelry is mined from volcanic ash and comes from Brazil, India, Africa, the USA, Uruguay, and Madagascar, among other places in the world. Visit here :- https://www.rananjayexports.com/blog/black-agate-mysterious-beauty