After ALOT of effort I managed to get the combat knife and launcher Gold, but it hasn't unlocked diamond for either. I'd be fuming if I wasn't so glad to of finished
New Knife Skin (China Server Exclusive) : r/VALORANT
Guide :: Get All knives for local server - Steam Community
10 Cube RPG Set W6 16mm DSA Knife Yahtzee Applic Opaque Black Green | eBay