In the game, these are 1-star, 2-star, and 3-star items dropped by common enemies.

Elite Enemies:

• Hydro Phantasms

• Frostnight Scions

• Hilichurls like Mitachurls, Lawachurls, Rogues

• The Abyss like Mages, Herals, Rifthounds, etc.

Refer to this link for the complete list: https://genshin-impact.fandom.com/wiki/Elite_Enemy