Little is known about Unknown society, or even of their kingdom of Scoria, to outsiders. What is known is that Scoria exists on the continent of Kailash, west of the Atlasian Sea from The Basket; and that it is a subterranean kingdom carved entirely from stone and metal.
"On the subject of the Kingdom of Unknown, of which I have been able to glean very little; the Unknown of Yarlung are reticent about their origins and customs. I have been able to learn its location - Unknown, who have given to me a working idea of the placement of major cities. And I have learnt the most fundamental features of Unknown revere nature to the extreme, unwilling to even harm a single tree to obtain wood. Unknown carve their homes out of unliving stone, beneath the surface; their possessions, from ornate thrones to simple bowls alike are likewise shaped from various stones and ores. Even their recordkeeping is done with clay tablets, or metallic engravings, depending upon importance." ~ On the History of the Nine Kingdoms of Yarlung, penned by the Architect Gnilda.