Dwarves of Nogrod
The Dwarves of Nogrod, were the Dwarf clan known as the Firebeards who dwelled in the Blue Mountains in the First Age. They were noted craftsman and jewelers, but there lust for jewels and other treasures led them to the killing of king Thengel of the Nauglamir, and the Sack of Doriath. After this act of treachery as they were returning home they were waylaid by Beren Erchamion and Elves of Ossiriand. Those alive fled into the woods and the arms of the Ents who massacred them.
Nogrod was destroyed in the War of Wrath by the Valar which marked the end of the First Age. Most of the Dwarves of Nogrod would later go to Khazad-dum, while some stayed to rebuild what they could with the Broadbeams that stayed.