To select which Gem appears both on your Home tab and within your widget on the iOS version of Opal, please follow the steps here:
- Tap on "Home"
- Tap and hold on the Gem currently displayed
- Swipe left or right until you've found the Gem you'd like displayed
- Tap "Apply Theme"
Once that's complete, the Gem you've selected will appear both on your Home screen and on your Opal widget.