A question I am frequently asked is, "What exactly is 18k gold filled?" Many years ago, it was called Rolled Gold. These days you can find both gold filled and silver filled jewellery in jewellery chain stores. It looks exactly like gold, but wears far longer than gold plated. Baby Jewels now has yellow gold filled baby and children's screw back earrings as well as white gold filled screw back earrings. Here's what a manufacturer says:
"Considered the very best in jewelry finished apart from solid gold, silver, and platinum, gold-filled jewelry, also known as "rolled gold", consists of a SOLID layer of gold that is bonded with heat and pressure to a base metal such as brass. To the naked eye, our quality 18k gold filled jewelry has the same appearance as solid 18k gold, and is far more durable than gold plated jewelry, even with daily use, our nickel-free 18k gold-filled jewelry is a perfect solution for people with sensitive skin. As a general rule, if you are able to wear 18k solid gold jewelry, you will likely not have an issue with our advanced, quality gold filled process.
It is important to highlight that earrings, bracelets, necklaces, rings and jewelry sets made of gold filled 18k are perfect for young children, girls and babies since they have even the same quality as solid gold 18k, cost less than a third of solid gold 18k, they are nickel-free products and they have an hypoallergenic protection."
I hope this answers some of your questions.