Design Notes:
-Amethysts typically have whip-like capabilities with their tails, which is why they look like tiger tails rather than lions tails like other quartz soldiers. Amethyst initially had that kind of tail, but with the influence of humans & her fellow gems, she ended up reforming with a fluffy tail in the future.
-Her features are rounded to show that she's "young" but her mane and fur are both pointy because she's technically fully-grown!