Ice down a martini glass. In a mixing tin, add ginger coins and cherry juice or grenadine. Muddle thoroughly and add ice. Add bourbon, elderflower liqueur and remaining juices. Shake well and strain into cocktail glass. Sink the cherry liqueur into the glass slowly to give the cocktail a transition in color from dark to light. Garnish with two fresh mint leaves on the rim of the glass and a pick of cherries along the top.