Talk:Sardonyx/@comment-26133294-20150721010513/@comment-508329-20150721191928

They're pink diamonds, like the one on Pearl's flightsuit.

There's a pink diamond symbol in the Ancient Gem Colony Ship, and on the outer wall of the Ancient Sky Arena (which was built before the war), but Peridot's Gem Warship and the newer Pyramid Temple use a different three diamond symbol. So I'm guessing that something happened with Pink Diamond before or during the war.