Sylvar

Sylvar is the unique metal forged in secret by the Vergar metallurgists. This metal alloy shines likes silver, is as light as polished aluminum, and is stronger than steel.
The secrets to working with sylvar are guarded by Armorer Metallurgist - Vergar  and passed on only in ceremonies overseen by The Order . Detailed records are kept of which Order members and which metallurgists know the secrets of crafting and repurposing sylvar. Over the centuries, the families connected to the creation of sylvar have become the aristocracy of the Vergar Empire - Imir.
Recent developments by Humans and Eldar scientists working in extreme secrecy threaten the dominance of sylvar. Quick action firearms and other uses for gunpowder have been discovered.