All is not gold that glitters.

闪光的东西不一定都是金子。

《新英汉大辞典》

There are not gold COINS about now.

目前没有金币在流通。

youdao

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

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

The goldsmith might also write notes promising so much gold and not promising the return of any particular item of gold.

这个金匠会写下票据,保证归还一定数量的金子,但是不保证归还某个特定的金器

耶鲁公开课 - 金融市场课程节选

In other words, they had U.S. dollars (actually Treasury bonds) as the reserve asset, not gold bullion.

FORBES: My Thoughts On Lewis Lehrman's Gold Standard

Emerging markets by and large have linked currency and monetary systems, though their link is to the dollar, not gold.

FORBES: Fiat Money Never Stays Golden Forever

Of course, when it comes to endorsement opportunities, not all gold medals--and for that matter, not all gold medalists--are created equal.

FORBES: Magazine Article