These materials are grown using the flame fusion method. They are grown primarily for the jewelry trade and play an important role in the supply of affordable and durable gemstones. Gems cut from these materials have historically been used for class rings, military rings, and other mass produced jewelry. Many precision lapidary artists in the United States create intricate designs on this bright and vibrant material.

​

Flame fusion crystals are cheaper to produce than czochralski grown crystals. They are zoned, less chemically pure, and are not used in science or other industrial applications. The boules are typically small (the corundum boules split in half after cooling), and the maximum size of a gem cut from this material is therefore limited in size. The videos below illustrate the differences between a controlled czochralski growing laboratory, and a flame fusion mass growing factory.