Wraithheart

Discovered by renowned explorer Sunddan Harlabeck along the trench in the Hrendh Skogar, near Raven's Point, these gems are only found in hues of pale to dark grey, each with brilliant clarity save for the deep black distended inclusion pierced with a threadlike vein of silver, bloodstone, emerald, or chartreuse that forms a wicked hook within the heart of the gem.