What is that? (TurboGrafx CD ending)

[David]

One of the pictures from the ending of PoP for TurboGrafx CD shows something that I can't interpret.
The left thing is a sword standing on the floor.
But what is that thing on the right? It looks like some kind of crystal.

[Falcury]

Hey, it also looks like there is a solar eclipse going on in this picture:

Else the shape of the moon is impossible!
http://xkcd.com/1738/

[Norbert]

But what is that thing on the right? It looks like some kind of crystal.

Hm, maybe a hexagonal pendant.
Example: http://g02.a.alicdn.com/kf/HTB1xeT0HXXX ... XFXXXD.jpg
Or maybe even an oddly shaped mouse.

[David]

Else the shape of the moon is impossible!
http://xkcd.com/1738/

Hey, if you knew how many times did I see the moon drawn that way...
(Also, maybe I should read XKCD more often? )