Shamrock Sprig, Lucky Irish Clover Leaf. Flat Vector Icon illustration. Simple black symbol on white background. Shamrock Sprig, Lucky Irish Clover sign design template for web and mobile UI element. Shamrock Sprig, Lucky Irish Clover Leaf. Flat Vector Icon illustration. Simple black symbol on white background. Shamrock Sprig, Lucky Irish Clover sign design template for web and mobile UI element.