玉ぎょく石せき混こん淆こう

noun

mixture of good and bad; mixed bag

Yojijukugo describing a collection or group that contains both excellent and inferior elements. Often used figuratively, not just for literal gems and rocks.

• このアプリのレビューは玉ぎょく石せき混こん淆こうだ。

  The reviews for this app are a mixed bag.

• 応おう募ぼ作さく品ひんは玉ぎょく石せき混こん淆こうで、選せん考こうに時じ間かんがかかった。

  The submitted works were a mixture of good and bad, so the selection took time.