There are two kinds of things made in the studio. One is ice sculpture, which can be made very large, 20 inches, 40 inches and so on. This kind of glass has a simple surface shape, just a flat thing, made of ordinary glass.
The other can be made into many shapes. This is a crystal image, made of K9 artificial crystal.
In fact, the two kinds of production principles are the same. All belong to crystal extension technology.