Ebony is only called gods' blood, but ebony is glass that's been under pressure, longer.
Glass
(1) (Raw Glass) Raw glass is similar to raw ebony, but less well-known. Ebony is jet black, while glass is a milky translucent green. Less durable, but much lighter and more flexible than ebony, glass is used primarily to make the distinctive, elegant glass armors and weapons of High Elven design.. (2) (Glass Weapons) The light and elegant Glass weapons of High Elven design feature extravagant use of rare metals and cutting edges made from rare crystalline materials. Duelists and assassins appreciate the delicate balance and sinister sharpness of glass weapons.
Besides the little, ebony spiel, looks like we can juxtapose mithril and glass. The presence of glass makes mithril a moot subject, as glass belongs to Tamriel, while mithril does not.
Glassblowers must be highly esteemed - perhaps having their own secretive, priest-like caste - as they seem to be the favored smiths
and architects of the Sumursets. The story behind its arrival on the mainland must be quite a yarn.