My gold ring is marked 585. What does that mean?

How do I know if my gold jewelry is real gold or not? Is there any test I can do by myself?

What is the difference between white gold and yellow gold?

Can zinc be used in making jewelry?

Is there any way I can change gold jewelry into silver jewelry?

Is it true that yellow gold diamond engagement rings are out of style?

How can I turn silver colored jewelry gold?

What's the value of a 18K gold men's bracelet?

What are the possible colors for gold? Which colors are naturally occurring and which ones are artificially created?

My boyfriend got me a gold engagement ring. He insists it's real gold but the ring keeps turning my finger green. Why?