Steven Universe - A real, original size and not defective Amethyst

Anyone remember that big-ass purple ax the gems found? I'm pretty sure that belonged to this big fucker right her, which would mean this gem was purple. Thus strengthening the theory what we see here is what an amethyst is supposed to look like.

The screenshot is from Sworn to the Sword (Do it for Her/Him) and the episode that the OP is talking about is Too Far.