Design Notes:
-I think this is based on the second one canonically.
-Younger/Older forms of Amethyst's manes cuts off at her shoulders; her tail otherwise is much like a tiger's tail with no tuft at the end. I think, of all the gems, she was the most influenced by humans in design so for this AU, her tail looks more like a domesticated cat's tail than any big cat!
-Famethysts are larger & look more like tigers with a small mane than Amethyst does.
-She IS still technically a quartz soldier and thus has a more stockier build & larger paws, but she's a lot shorter and smaller than normal.