The new Frialian material: glass

Did you see the beaded necklace the queen was wearing? I've never seen anything like it before!

— Lusenne, a Tielian from Tregtet after an audience with the queen of Bastelia'hu

There are many rumours on the new material the Frielians have discovered, or some say, created! People in Tiel have been quite eager to learn how to use and produce the material, but very few have managed to do so.

Glass: useful for beads or containers

The new material is seeing fast development, probably thanks to the interest that the monarchs have put on it. Across the sea, a few gnomes have made discovering the secrets of glass their new life mission, abandoning their previous research projects.
Thankfully, although very expensive, the material can be bought, providing samples for research, or grounds for bragging.

I just exchanged a very powerful flaming scythe in exchange for this curious rod. It was perhaps not a profitable trade, but I believe this must be the material the halflings that came around Pertkwugo were talking about last year...

— Tjun, propietor of the Arcane Box

A stolen idea?

In the anarchic Virai islands, there are many that claim that glass was their invention. According to their gossip, they started making this material with some of the slags they obtained during metalworking.
Supposedly, a halfling eager to return to Friac'seoue, her previous misdeeds forgotten, stole a blacksmith's journal and a few samples of the beads created with the refined slag. She then sailed to Friac'seoue and went straight to Bastelia'hu to request a meeting with the monarchs. She gifted the queen with a necklace made with the beads and the king with the blacksmith's journal.

Utility

Currently, the material does not seem to have much utility beyond decoration.
Although there are whispers of waterproof containers made with this light material, it is more speculation than anything else.