The Crystal collection by Top Knobs includes various cabinet knobs with crystal handles. The backplate of the knobs come in a variety of finishes including polished chrome, brushed satin nickel, and oil-rubbed bronze. The crystals come in a wide variety ranging in color and shape. The crystals come in three different shapes: octagon, melon, and crystal shaped. Order your crystal in amber, green, clear, wine, black, and blue.