When I try to pick up opals in the Isle of Skye, I have about a 40% success rate. Most of the time they are not added to my inventory. What is even weirder is that because of this problem, I started saving my game before trying to pick them up. If it fails, I reload the prior save in order to try again but the opals are still gone when the game reloads. This happens even if I shut down the game and restart it first. So I have lost out on a lot of opals. This is rather disheartening because I am trying to collect a couple of helix sets and I am wasting a lot of time traveling around with not much to show for it.