Sydney Grace Forget-Her-Not is a cool purple with a pearl finish that is permanent in palette and retails for $6.25. In comparison, Natasha Denona Amethyst (141M) is a cool purple with a sparkle finish that is discontinued and retails for $29.00.
Natasha Denona Amethyst (141M) is 80% similar — it is more shimmery, lighter, warmer.