玉石

1. Origins, structure, and basic meaning

• Structure: 玉石 (ぎょくせき) is a noun literally pairing gems or jade with ordinary stones.
• Basic usage: It also works figuratively for a collection containing both good and poor items.
  • 箱の中には玉石が無造作に入っていた。 — Gems and ordinary stones lay jumbled together in the box.
  • 多くの投稿作品には玉石が入り交じっていた。 — The many submitted works were a mixture of good and bad.

2. Common pitfalls and similar expressions

• Literal objects and mixed quality
  • In a mineral context it names gems and stones; with submitted works or other evaluated items, it describes mixed quality.