Antique Carriage Diamonds & 18k Gold Brooch One of a kind Antique Carriage Brooch crafted in 18k yellow Gold and Platinum, featuring a Coachman holding an umbrella riding a horse. This Beautiful Brooch is accented by Single Cut Diamonds weighing Approx. 0.15 carats. Measurements: 2.0 x 1.4 inches. Weight: 20.5 grams. Very good conditions. Upon Request, Auction House may provide an appraisal. This will carry an additional cost. Appraisals are made by our in house GIA certified Gemologist.