Natasha Denona Calypso Blue (05M) is a warm duochrome with a sparkle finish that is permanent in palette and retails for $29.00. In comparison, ColourPop Gneiss Guy is a warm duochrome with a sparkle finish that is permanent in palette and retails for $4.50.
ColourPop Gneiss Guy is 90% similar — it is less shimmery, cooler.