Looks may be deceiving but time will reveal all. Buying solid gold chains as opposed to gold filled or gold plated necklaces or bracelets may seem expensive when they both look exactly the same.
Immediately you will notice the difference in weight between the two, the solid gold chains will feel considerably heavier and sturdier and they are.
The gold filled chains will look great when you first wear them but it won’t take long before the thin coating wears through and the cheap base metal becomes visible and completely spoils the look of your necklace. Plated jewellery will suffer from the same problem only it will happen more quickly.
Either way, the money you have spent on an imitation chain will have been wasted and a replacement will be needed.
A solid gold chain however will always look as good as it did on the day you bought it with a little cleaning now and then.