So you want to go for some diamond hunting, eh? Well, if you’re doing it in Knack, then you’ll have plenty of trouble, because it’s a big-time rarity. And when I say big-time, I mean big-time.
You will probably be able to find them most regularly on a Hard playthrough, but it’s highly unlikely you’ll ever come across more than 2 (which itself is very lucky) per playthrough… unless you exploit the game.
Knack Diamond Crystals Farming
There’s only one currently known good way to farm Diamond Crystals, but it requires tons of patience, so make sure you have plenty of time on your hand before you attempt it.
After opening a chest, and finding a crystal you don’t want (anything apart from diamond), don’t select the X button, because it will also trigger an auto save.
Instead, close Knack by pressing and holding the PS button. Restart the game and you’ll be back at the beginning of the chapter, and the chest you had just opened will be closed again.
Keep your fingers and toes crossed, and make another attempt at it. If you get it, do the boogie, and then move on to the next chest. If you don’t, then just close Knack again (don’t press X!), and repeat the process.
It’s a tedious task, so you will definitely want to farm chests that are only close to the beginning of a chapter, because you will restart to the beginning of the chapter every time you close down Knack without saving.
And oh, don’t forget to back up your saved games, just in case something gets screwed up in all that restarting!