About any jewelry maker that cast or sales jewelry can do this simple job. It takes only a plater or dipping and electric current.
Sometimes it can.
Yes
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.
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.
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!
It can be Gold or Silver plated yes but will not increase the value
it means that its not solid gold its plated or dipped in gold
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.
White gold
The symbols S51 on a 14k white gold ring illustrate the purity of the gold.
the markings on jewellery to prove its white gold
Yes can be white Gold hallmark in gold metal alloys Ring.
Two tone engagement rings are made by using both white and yellow gold in the design. One part of the ring will be yellow, another white. The two colors are specifically dipped and set.
yes