Necklaces / Pendants by Georgia Wiseman The length of the triangl drop unit is 45mm. Features Primary Material : silver Other Materials : 18ct gold, oxidised silver, pyrite, rock crystal and tourmaline Length (inches) : 16 and 19 One of a Kind : No Metal : 18ct gold and silver Gems : pyrite, rock crystal and tourmaline Hallmarked : No Cleaning InstructionsShould the necklace need cleaning, I recommend using only a soft damp cloth and giving the item a gentle wipe. Do not use any abrashive material on the item.