Solid moonstone cube
A solid moonstone cube is a magical item commonly found in the treasure system that is imbeded with Martial Prowess (1705), a spell that adds +10 to Combat Maneuver offense and defense rolls within the CML. They give no benefit to non-CML maneuvers.
A solid moonstone cube can be activated using the RUB verb, with no Magic Item Use skill requirement, and generally contains one to two charges. This item is very similar to a heavy quartz orb, however meant to benefit weapon users instead of magic users.
Heavy moonstone cubes are exactly the same as solid moonstone cubes, except that they are rechargeable.