This wonderful antique piece was made around the early 1900s. It has been tested to be 18k solid yellow gold and weighs 9.8 grams. The crescent brooch measures 1 1/4" x 1 1/4". Set in the brooch are 19 mine cut natural diamonds with an approx total weight of 3.00 cts. ranging from around .05 cts to .75 cts. The diamonds range from VS2 to SI2 and G to I in color.