Virtually any material* can be cut using Waterjet machining:

Steel                             Plastic

Aluminum                    Rubber

Stainless Steel               Foils

Copper                         Gasket Material

Carbon Fiber                Metal Matrix Composites

Brass                            Glass

Fiberglass                     Marble

Titanium                      Tile

Ceramics                      Wood

Tool Steel                     Acrylic

Hastelloy                      Bullet-proof Glass

Inconel                         Polyurethane

Magnesium                   and more....

*Except Tempered Glass and Water-soluble materials