Vintage 18k Gold Turquoise Brooch Shop » Fine Estate Jewellery » Vintage 18k Gold Turquoise Brooch Vintage 18k Gold Turquoise Brooch Exquisite flower design with highly detailed petals. $950.00 1 The brooch measures approximately 1 1/2″ (3.5 cm) in diameter and weighs a total of 11.9 grams. Stamped.