Per MadFloyd's blog post, coming in Update 7:
· A new recipe has been added to the Dragontouched Sovereign Altar to shatter a undesired Sovereign Rune into … something else. Any Sovereign Rune can be placed in the Altar with one Draconic Rune to activate this recipe. The Sovereign Rune will be destroyed, and Runes of some sort will be returned, but the recipe is unpredictable. Oh, and the runes are now identified. :-)