Here's a handy Diablo 4 gem upgrades list that will tell you what level your character needs to be before Flawless and Royal gems drop.
Diablo 4 Gems Guide: Everything To Know About Gems and How To Upgrade - EssentiallySports
How To Upgrade Jewelry In Diablo 4
Xbox Series XS Archives - Page 46 of 353 - GameRevolution
What you should know about Jewel Crafting in Diablo IV. All Gems, Stats, and Upgrade Costs.
Diablo 4 gems - how to upgrade best gems for every class in Season 2 - VideoGamer
All Diablo 4 Gem Upgrade Levels - Gamer Tweak
Diablo 4 Gem Upgrades List: When Can You Find and Craft All Gems? - GameRevolution
Diablo IV Complete Gem Guide - KeenGamer
Xbox Series XS Archives - Page 46 of 353 - GameRevolution
Social Hubs - FasterCapital
Diablo 4 Gems: How to upgrade gems and unlock the Jeweler