18kt white gold Quatre Black Edition diamond tie necklace from BOUCHERON featuring 18kt white gold, round cut diamonds, pavé setting, PVD-coated stainless steel, polished finish, delicate chain and adjustable sliding fastening. Conscious: 95% of the gold Boucheron uses is recycled, thereby reducing the brand's environmental impact. The remaining 5% is certified Fairmined.. Learn more about what makes a product Conscious on our Conscious Criteria page.