All is not gold that glitters.

闪光的东西不一定都是金子。

《新英汉大辞典》

All that glitters is not gold. (or: All is not gold that glitters.)

闪闪发光者，未必皆黄金。(或：发光的并不都是金子。)

youdao

Don't be taken in by his stories about all the famous people he knows. Remember that all is not gold that glitters.

他说他认识所有的知名人士，不要轻信他，记住：发光的不全是金子。

youdao

But I also tell my children that all that glitters is not gold.

VOA: special.2011.04.00

All that glitters is not gold, but it must have free electrons.

并非所有发光的都是金子，但是要发光必须有自由电子。

麻省理工公开课 - 固态化学导论课程节选

Continue through the winding lanes to the wooden-latticed arcades of the Gold Souq where all that glitters is not just gold.

BBC: A perfect day in Dubai

All that glitters is not gold in jewelry retailing.

FORBES: High gold prices took the shine off jewelry stores' margins

Not all that glitters underwater is gold: The Pollockshields, for instance, which sunk a century ago, is still laden with live ammunition and shell casings.

BBC: Wreck diving in Bermuda