After Fire Emblem Warriors appeared at E3, Nintendo and Koei Tecmo announced a couple of special editions for Japan–one of which, the “Treasure Box”, includes a replica dragonstone crystal.
Today, the official Japanese Twitter account was kind enough to show an in-production image of the dragonstone itself. Presumably, colour has yet to be added; even still it looks very impressive.
Not shown is the display stand for the crystal, which can playback voices of various heroes. Assuming the stand is indeed an alarm clock, it would be pretty amazing to have likes of Marth and Tiki wake you up in the morning.