A memory ornament idea would be a Pine Cone, sprinkled with your glitter color choice and attaching angel wings to the back. Using a pipe cleaner or ornament hook to hang from the tree.
Another idea is to use popsicle sticks as the frame and attach a picture of the person or persons who have passed and attach that ornament to the tree.
Allow the memory of your loved one(s) to remain a part of the holiday season. Place your ornament at the top center of the tree.