Too Faced Heart of Gold is a warm green with a metallic finish that is limited edition and retails for $16.00. In comparison, Natasha Denona Smoky Quartz (43P) is a warm brown with a pearl finish that is permanent in palette and retails for $29.00.
Natasha Denona Smoky Quartz (43P) is 80% similar — it is less shimmery, lighter, warmer.