From DivNull RPG
These surgically grafted hearthstone mounts increase the wearer's peripheral pool by twice the rating of an attuned hearthstone placed into it. They are described in Aspect Book Air [ab_e.80] and Wonders of the Lost Age [wola.72].
Jorias has a white jade amulet grafted into the small of his back.
Stag has a blue jade version.
Two red jade versions are in the vault of the Forgotten Manse.
Summary: Hearthstone mount that increases peripheral pool
Materials: jade, orichalcum, moonsilver, soulsteel, starmetal