I did a search and didn't find this anywhere. Outside of Cliaban Rilag is a little camp, right before the jump across. I'm not sure how I replicated this exactly but there's a small container in the camp with the Readceran Standard Piece in it and on my way in I was able to grab one. On the way out I noticed the container was still blue so I grabbed another one. Finally when I came back to finish the ruin up I saw the container was blue again and I was able to grab a third piece and this is when I realized that I really had already grabbed this twice.

What OS is on your computer?  What version of the game are you playing?  Do you have Eder with you?  What stage of his personal quest chain are you at?  Where there people in the camp, and if so what happened to them?  Can you provide a saved game that will allow a tester to replicate this bug?