Urban Decay Y3K is a warm duochrome with a metallic finish that is limited edition and retails for $19.00. In comparison, Natasha Denona Abalone (246DC) is a warm lavender with a metallic finish that is permanent in palette and retails for $29.00.
Natasha Denona Abalone (246DC) is 90% similar — it is more shimmery, lighter.
