Guild Wars 2

My character is level 21, the Topaz Nugget says Required Level 20, double click to apply to item with unused upgrade slot, but when I double-click it and apply it to either a Staff or Sceptor it just turns red and does nothing.

I can apply lesser jewels like Amber Pebbles, so why can’t I apply a Topaz Nugget?

the wep you are putting the gem into needs to be lev 20 or higher. not your toon.