Mysterious fragments appeared randomly in treasure chests, all types, all facets, all professions, starting with Publish 105 in June 2019.
The fragments can be found in eight colors, one color representing each of the Virtues.
If placed on a Shrine whose color corresponds to the Virtue of the fragments color, a message will appear stating that you feel a surge of power and the fragment will sink into the ground. Nothing else seems to happen...
As of 11/8/2019 they remain.....mysterious.