With the Land of the Morning Light Patch a new combined repair material has been added to the game.
Miracle-Imbued Stone.
To make this stone you need to combine the 2 types of existing repair materials.
a) Impeccably Polished Stone
b) Fine Black Stone Powder.
To combine these 2 into the new repair material you need item that drops from the nodes in LOML.
Mysterious Powder.