Smashbox Rose Glitz is a warm duochrome with a glitter finish that is limited edition and retails for $32.00. In comparison, Maybelline Opal (050) is a cool duochrome with a glitter finish that is permanent and retails for $9.99.
Maybelline Opal (050) is 90% similar — it is more shimmery, lighter, more pigmented.
