The Lunate Cross is a neo-pagan symbol, purportedly used by northern European shamans, where the concave shape of the moon crescents represents our hidden feminine nature with its various moods. Being a controller of the tides, having a moon in four directions can help balance our moods.
The moon 'horns' are outward-facing, protecting the cross. There are four moons to remind us that the moon has four phases, symbolising protection throughout the month.