If something is worth its weight in gold it is very valuable or useful.
Mark's travel advice about visiting Venice really was worth its weight in gold. He recommended some fabulous restaurants and a brilliant cheap hotel.
Jill, you're a star. Thanks for all your help. You're worth your weight in gold!
All that glitters is not gold. This proverb is used to describe things that are attractive on the surface but not as wonderful in reality.
Example:
Listen, Frankie. All that glitters is not gold. I know you think a job in fashion will be glamorous and fun, full of exciting parties and photo shoots; but there will also be a lot of competition and you will have to work really hard to succeed.
Indians are the world's largest consumers of gold, where it is often seen as an investment. Nicknamed "the gold man", Datta Phuge spent $250,000 on a shirt made of the precious metal. He said: "People have different aspirations. Some elite people want to own an Audi or Mercedes, and have big cars. I chose gold."
worth its weight in gold: ağırlığınca altın değerinde, ağırlığınca altın etmek
All that glitters is not gold: Parlayan her şey altın değildir.