Glove of Burrowing

Gloves of burrowing allow you to tunnel through the ground. Appearing as flexible cracked rock, a pair of gloves of burrowing are made from the stony hide of a xorn or similar elemental creature with the ability to burrow through earth. Simply putting on the gloves grants you the ability to move through earth and stone. In addition, once per day, you can make a sudden chopping motion to grant you the ability to mold stone as clay, but doing so causes the gloves of burrowing to lose all power for 1 hour afterward. While worn, the gloves of burrowing grant you the ability to push through earth or stone with a burrow speed equal to one half your base land speed. Your passage is like that of an earth elemental, leaving no tunnel behind for others to follow and indeed no signs of your passage at all. In addition to the ability to move through the ground, gloves of burrowing grant you the ability to use stone shape once per day as a 9th-level sorcerer.
Moderate transmutation; CL 9th. Craft Wondrous Item, passwall, 40,500 gp, 3,240 XP, 81 days. Weight: 1/2 lb. Price: 81,000 gp.
Source: Dragon #347