Solved
Random color crystal missing (cartel market)
Yesterday I bought some stuff from the SWTOR cartel market. The problem I got was when I bought a random color crystal "loot box", I opened it but and got a fairly cool looking crystal but after that...
When you open a pack from the cartel market it goes into the cartel stash. You then have to claim the item from the cartel stash which can be done on any character. Press Shift + P when logged in to open the cartel stash then at the top click on the Item stash tab and it should be there.
You can then click the claim button to get the crystal in your inventory.
