Zirconium

Zirconium is the first of the transition metals, their very existence being a practical reminder that metals are crystalline in essence - and nothing more so than zirconium, which is manufactured to produce the beautiful artificial cubic zirconia diamonds. Light and strong, lustrous and exceptionally resistant to corrosion, zirconium dances between the planes and keeps its identity regardless of the states it inhabits. Magically, this makes it into a good companion for far journeys, and transmutation.