What gems do YOU think are "perfect cuts"?

Confirmed in the show that Jasper and Spinel are perfect representations of their gemstone, but who all do you think might exemplify this as well?
My friend thinks our familiar Lapis Lazuli might be one, as she easily overpowered three other Lapises.
I'd also like to throw Volleyball Pearl into the discussion; Pink Diamond got the best gifts as the little sister diamond, so it makes sense her first Pearl would be the best Pearl they could find