Margaret O’Rourke wears her charisma like a scent. It expands to fill a room and lingers after she leaves.  Dressed in black, with limbs and extremities subtly glittering in gold, O’Rourke’s elegant persona goes some way to explaining the success of her jewellery business MoMuse.  A naturally private person, she typically turns down requests for media interviews, or from lifestyle magazines to photograph her home which she shares with her husband Paul.  But in the shadow of a looming economic slowdown she agreed to speak to The Currency podcast as the conditions in which she got her start in the…