The crystalline glazing process is different than my other glazes. It requires more material (half of which becomes waste product), more time, and more energy (both physical and electrical). The crystalline kiln loads hold 5 or 6 pieces as opposed to 60+ I can fire in my other kiln. These small batches and smaller kilns are required to achieve the fast rising and cooling rates necessary to form and start the crystal growth. The process is also quite hard on the kiln's elements and brick walls, both of which are costly to repair/replace. It is for these reasons, and more, that the crystalline pieces sell for significantly higher prices than their non crystalline counter parts.