It can be Gold or Silver plated yes but will not increase the value
Zinc coating(hot dipped) with iron n steel
The convert yellow to white gold depending of the piece if it is small or big can cost from $60 thru $200 every 6 mo. thru year; but it is much better to buy pure solid white gold in this day's.
About any jewelry maker that cast or sales jewelry can do this simple job. It takes only a plater or dipping and electric current.
24karot gold layered. Its fake. (dipped in gold)
it means that its not solid gold its plated or dipped in gold
The reason the white gold is starting to turn yellow is probably because the jewelry is made of yellow gold but was dipped in white gold. You can fix this by having it re-dipped.
usually means gold dipped
I assume you are asking this for one of two reasons. First, because you have a yellow gold ring that you would like to make into a white gold ring. The answer to that is, no, you really can't do that. Liquid gold is molten, meaning that it is heated to a high enough temperature that it melts. Dipping a ring into molten gold would make it melt, too. Maybe not completely melt down into a puddle, but you would certainly lose any detail in the ring's design. The second reason you might be asking is because you have a "white gold" ring that has a golden yellow core, like yellow gold that has been dipped into white gold. This, unfortunately, is merely a brass ring (the yellow part) that has been plated with a white metal, perhaps white gold, but more likely some kind of whitish silvery base metal.
A five pure gold ring is incorrect it is a 10g pure gold ring
The yellow gold dipped with Rhodium plated it is not white gold ... It is alloys of yellow gold with Rhodium plated... Only "Pure Solid White Gold formula" it is the real white gold inside and outside white; Life time guaranties!
I think it is the large gold ring