These pins have the greatest perceived value and a jewelry-like finish. It is said that cloisonne can be preserved for 100 years because it is derived from mineral ore. This ancient art that developed for over a thousand years in China requires meticulous handcrafted details. These custom designed pins are formed on a copper bronze surface and then hand-filled with colored cloisonne paste. The pins are then kiln fired at 800 degrees centigrade. More color is then added and the pins are fired again. These steps ensure that the bleeding of colors does not occur. After firing, each pin is hand polished and plated to make a hard and smooth jewelry like finish which is extremely resistant to scratching.