"Vidím hezký šperk."

Translation: I see a nice jewel.

[DarrylMose]

So, with "šperky" meaning "jewelry," and "šperk" meaning "jewel," does "šperky" also mean "jewels" and does "šperk" also mean "a single piece of jewelry"?

[endless_sleeper]

Yep.

[Paul378887]

Why can’t this mean “I see a pretty gem”? A “gem” and a “jewel” are synonyms.

[VladaFu]

Yes, a jewel can also mean a precious stone, a gem, but that does not mean that šperk is a gem too. Šperk is the whole product, not just the stone.