Hofthorm Blutium Urns were made during the reign of King Hlimi of Hofthorm. The blutium in the urns came from the lava fields around Knis-Leir. These items are rare, mainly because most see the value of the blutium and not the item's historic and cultural value.
The metal alone, makes these urns valuable, but too a collector these very old and ornate pieces go for 3,000 gps to 20,000 gps. These items were forged and crafted by the fire giants, so they are massive and very heavy.