Board Thread:Fun and Games/@comment-29979363-20170120203844

Call me crazy, but I believe this theory has quite the evidence.

The Arkenstone as depicted is VERY similar to a Silmaril, seemingly glowing on it's own, no normal gem does this.

Two of Feanor's sons had a silmaril each, Maedhros, one of the two, cast himself into a FIERY PIT and Maglor, the other son chucked his into the sea. Erebor is most likely an extinct volcano, it is a large peak in the middle of nowhere, with no really nearby mountain ranges.

Silmarils had a sort of hold on the people who owned them, similar to the One Ring, this could explain Thror, Thorin and other's desire of it. More examples of silmarils taking hold over people are, Maedhros, Maglor, Feanor, Morgoth, Thingol and the Dwarves of Nogrod.

A problem with the theory is that the dwarves say it is a faceted gem, and the silmarils cannot be shaped or harmed, but I believe this is more of a rumour, and that Silmaril was already faceted. 