When asteroids containing hedbergite pass close to suns or other sources of intense heat can cause the hedbergite to glassify. The result is called II-Grade or vitric hedbergite and has 5% better yield than normal hedbergite. Hedbergite is sought after for its high concentration of Pyerite and Nocxium. This material was compressed using an older process that compressed batches of raw materials into units using a set input quantity. Newer compression technology uses a more flexible one-to-one unit compression system.