Copper, silver, or gold MC cartridge coils?

To Add to the list of Coil Wires being used.
Aucurum Wire,
( Gold Plated Six 9's Copper) known to be used by 
Ortofon for approx' 20 Years in some of their designs.

Koetsu Urushi,
( have a model that has a Silver Clad ' not plated'  Six 9's Copper )

I have been impressed with Ortofon Cartridges that have coils wound  Aucurum , as a result I now own a Cadenza Black, that I intend on having rebuilt to a change of Specification.

There are also Cartridge Tag Wire Pins used of different Metals, 
I am sure the combination of Coil Metals and Pin Metal will also have an
Sonic Signature.   
   

The following will offer a description of the Urushi Cartridge Bodies as well as a description for the Silver Clad Copper Coils on a Koetsu Urushi.


There is no such thing as THE URUSHI – because Koetsu delivers different models – leaving out the Koetsu Urushi Vermilion, which I will talk about in a minute. All of the other Urushi cartridges are technical equal – what differs is the amazing lacquer artwork in the traditional Japanese Urushi fashion. Some of the models are made with very old techniques, and they are named after the Japanese cities in which these techniques were invented – examples are the Wajima and the Tsugaru. Others use a more modern twist to the old traditional techniques, the Sky Blue comes to mind. Urushi lacquer is a natural product which is won out of tree resin. It needs a long, long time to get fully dry and as it gets dry it gets harder and harder. Underneath the Urushi lacquer – you might guess it already, we will find – a rosewood body….so the Urushi carts use the same material and body form factor as the Rosewood Signature – the difference is the lacquer technique which gives the body a different behaviour regarding mechanical energy transmission and resonances! Technically there is also something new to discover….we still have a 6n pure copper coil but in this case it is cladded with silver. The cladding process could be explained if you imagine your girlfriend or wife putting on her sexy nylon stockings….. So the silver is not melted upon the copper nor is it a hybrid material mixture – it is still pure copper with a very thin cladded silver layer on top. The magnets circuit uses still smarium cobalt material as we get it also from the entry level Black Goldline, but – SURPRISE!!!! we will have now treaded mounting holes – THANK YOU KOETSU!!!!!