... seven specific categories: Irregular Upper and Lower Border, Favrile, Geometric,Transition to Flowers, Flowered Cone, and Flowered Globe lamps. ... male craftsman, speaks for itself. The Tiffany craftsman used geometric shapes such as triangles, squares, rectangles, and ovals to form ... two smaller categories is the difference in the lamp shapes, basically a cone and a globe.ProductionAside from their ...