Forever
no, the colour of gold depends of the alloy in it. you can plate it but it will not last very long.
The thickness of gold on a gold-filled watch varies, including on the same watch, as a gold-filled finish can vary in thickness. But generally, a gold-filled finish will be about 20-40 microns thick. A 20 micron gold-plate finish is a bit thinner than most filled-gold finishes but is more uniform. A 20 micron gold-plate finish will wear a long time and compares well with a gold-filled finish.
Heavy gold electroplate is a jewelry finishing technique that involves covering a base metal with a thick layer of gold through an electroplating process. This results in a durable and long-lasting gold finish that is resistant to tarnishing and wear.
60 microns=2.362204724 mil
Not long, all over the world people buy and use gold
gold plate isn't durable at all it depends how you look after it as well..., as the sweat on your finger damages the ring removing the colour and leaving a horrible black or green finger ive had many gold plated rings myself !!
They look somewhat similar to a tadpole and they are about 40 microns long. The period at the end of this sentence is about 615 microns long.
1 month
1 month
Approx 3 years for gold electroplating.
The gold rush in Ballarat lasted 13 years
1851-1865