When Josh mixes a new formula of Corona glass, he tests each batch for its unique color characteristics and compatibility with the clear glass he uses in the studio. To accomplish this test, he gathers a swirl of the molten glass, sculpts it, and embeds it inside a crystal orb. If this work survives the cooling process without cracking, then Eureka!, the new formula is a success. The resulting sphere then contains a unique twist of vibrant Corona glass.