The Gold (Wajima) finish encrusts the whole cartridge body with gold flakes and is the most difficult to produce.
The Black (Tsugaru) starts with a base piano-black finish and has bands of gold speckle along its sides.
The Vermillion is finished in a less striking reddish lacquer color.
The Urushi cartridges are probably the most striking in the whole Koetsu lineup because it encompasses the traditional art of Japanese lacquerware in the production of the cartridge body. Even without reproducing music, the Urushi is itself, a work of art.