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, he gathers a swirl of the molten glass, sculpts it, and embeds it inside a crystal orb. If this piece 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.