Full correct name is: Stone Wardens Chest. As shown in my picture.
This chest can also contain Rhodium Encrusted Carpal Clay
Spawns following the event "The Stone Warden" in the Convorteum raid instance. (See this quest entry for event information.)
Acrimony, Morthira's Corruption
Amulet of Brell
Brightly Pulsating Crystallized Cosgrove Shard
Brilliantly Pulsating Crystallized Cosgrove Shard
Calyssta's Jeweled Cincture
Cassarah, Iron Will of Brell
Eye of the Warden
Flowing Clay Carver
Forcible Axe of the Ward
Immaculate Sphere of Clay
Majestic Cloak of the Mistresses
Manaflow Veil of the Convorteum
Monnion of the Self
Rhodium Encrusted Brachial Clay
Rhodium Encrusted Carpal Clay
Rhodium Encrusted Cephalic Clay
Rhodium Encrusted Crural Clay
Rhodium Encrusted Phalangeal Clay
Rhodium Encrusted Tarsal Clay
Rhodium Encrusted Thoracic Clay
Shining Guard of the Underfoot
Tellurian Joint of Potential
Thrice-Layered Shoulderguards
Twinkling Hyperfiligreed Rune