It's a little puzzling to me that one would use such expensive rondelles (assuming the stones are real, not lab created and the metal is solid) with rpretty standard FW pearls. Maybe it's from a time when these pearl were more rare than they are today and most FW pearls were potato shaped. But, yes, FW.
Hello everyone and thank you for identifying the pearls as freshwater from China. About the rondelles yes they are made of 18k gold, Yellow for the yellow sapphires and black rodium plated for the pink and blue just to enhance the look of the colors.