The birthstone of December whose colors range from shades of blue to blue-green to yellowish green depending on the amount of trace elements. Copper adds blue. Chromium and vanadium add green. Iron adds yellow. This beautiful shade of blue with a subtle shimmer is perfect to celebrate the December babies in your life. Size: 15mL / 0.5 fl. oz. Directions: Apply base coat, 2-3 thin coats of polish (to desired opacity), then top coat. Allow 2-3 minutes dry time per coat. Colors are made in batches, may slightly vary.