Kronos (aka Kronos2) was one of our first colors and has earned some loyal fans over the years. Unfortunately, Kronos is made from Vetrofond cobalt cullet. Vetrofond has ceased production and we can no longer aquire that cullet. Our last pot of Kronos has been pulled. There are several pots worth on our shelf right now but when they’re gone, that is the end of Kronos. An enhanced formula of Kronos that is stronger, cleaner, and easier to strike. When worked in a slightly reducing flame this color develops swirls of blue, green, cream and a rainbow iridesence. Briefly reheating in a oxygen rich flame can enhance struck color. This glass is a deep cobalt blue.