Hi @kingbeard could you please go to the location where the opal was and provide a screenshot and also provide another screenshot of your map showing the exact location.
I can then forward this on to the development team.
Can you also confirm if you encountered the issue on update 1.5.2 or 1.5.3? If it was on update 1.5.2 was the opal removed with update 1.5.3?