Thuraz (Thoo-rahz)

Were folklorists to create a list of the legendary super metals compiled from all of Teryn's mythology, one wouldn't be surprised to find and could forgive them for including thuraz. But unlike such illustrious contemporaries as mithril, adamant, star metal, orichalcum, and others thuraz isn't mythological. In fact, thuraz refers to a series of legendary metallic alloys manufactured and used by the vegrādu of Sāvarāhid. The legendary aspect comes from their inability to replicate the metal since the fall of the First Empire. They do retain the ability to work existing samples and/or recast them in a special process. All legitimate thuraz in modern circulation is done in the form of quality-graded ingots verified by the Deqis Nesgāhid Deshbaz, the Ancestral First-Metals Society, one of Bartoq's trade guilds. A complex grading system of color, specific gravity, density, and other factors are used to determine its rank, which is stamped along with its weight upon the surface. These grades are:

Ragda - "King," the highest and most pure grade. Worth 3x its weight in gold.
Athna - "Lord," the second-best ranking, and the minimum grade a Mazrūn will inscribe rūn upon. Worth 2.5x its weight in gold.
Kamda - "General," the second to lowest rank, considered "munitions grade" thuraz. Worth 2x its weight in gold.
Mazra - "Master," the minimum rank that will be considered thuraz, most commonly sourced by either repeated salvaging and recasting of older items or an ingot made of a conglomeration of items melted together. Worth 1.5x its weight in gold.

There exists a specialty rank known as "Regdāhid," or Emperor-grade. This is thuraz that still bears a weights and measures stamp from Sāvarāhid itself. Such a thing hasn't been seen in the modern age and has incalculable intrinsic and historical value. Thuraz is known to be lighter than steel, but of greater hardness and toughness. It can be drawn into wire for inlay (and often is) as readily as gold. It's also seemingly impervious to corrosion and has great abrasion resistance; any apprentice tasked with polishing thuraz can vouch for the latter. While too valuable to be used as mechanical components now, legends of the First Empire speak of its use in innumerable machines without lubrication or cooling. Other legends that can strain credulity mention it being seamlessly grafted to bones to repair breaks or for the mounting (and construction of!) prostheses that could function like normal limbs.