Elf-crystal

Elf-crystal (also known as elf-glass) is a special substance made from wood by elven warlocks. It has properties similar to gemstones: it’s very hard, and very reflective.

The Ruby City, and according to elvish legend the other five of the Six Jewels, are entirely made out of elf-crystal.

Elf-crystal

Reikai BrianBowyer BrianBowyer