Hespet Archipelago

The Hespit Archipelago lies near the South of the Ozmit Sea to the South of Tal'Dorei. This island chain contains, but is not limited to, the Isle of Glintshore and the island where Raishan took Thordak after the battle in Emon.

The region is known for its geothermal and sub-volcanic activity. Because of this, volcanic activity is the likely progenitor of this island chain.(episode 81 @02:15:30)

Trivia
 * Both known islands in the chain have similar geography, meaning the whole chain may be populated with islands that appear covered in shards of broken glass.
 * Keyleth scries on Raishan and is shown one of the islands of the archipelago (episode 81 @01:46:13)