Low-grade glass, or ‘diglass’, has less value as currency than it does as a raw material, for what it lacks in lustre it makes up for in versatility and strength. The impurity of diglass is intentional—glaziers introduce carefully-controlled amounts of extraneous material in order to improve the sturdiness of the product, or to colour it for advertising purposes.

Most commonly, diglass is used in bottles and jars for the transport of water, wine, or sand. However, glass has an excellent sharp edge, and many glaziers have devoted their lives to perfecting battle-ready glass composites that can not only deliver a killing blow, but deflect one, as well.