Nomination Classic Silver Oxidised Symbols Number 13 CharmA classic silver Nomination charm from the composable collection, this piece features oxidised silver, a sterling silver that has been darkened through a chemical process to create a striking light and dark contrast. Celebrate a special 13th birthday with this classic charm from the Oxidised Numbers range. Featuring a bold and striking number '13' in contrasting silver, this charm is the perfect reminder of that momentous "Teenage years" Birthday.