Necklaces / Pendants by Nick Hubbard Features Primary Material : oxidised silver Other Materials : 9ct gold Length (inches) : 16, 18 and 20 One of a Kind : No Metal : silver and yellow gold 9ct Hallmarked : Yes Cleaning InstructionsIf your jewellery becomes tarnished - use a soft, old toothbrush (definitely NO toothpaste!!!) dip in warm soapy water and brush gently. Rinse in cold water and dry carefully (you could use a hairdryer on a low heat setting). If your jewellery has enamel paint on it, use a cloth impregnated with silver dip to clean it.