Yellow Gold 925 Floral Enhancer Pendant

Very pretty black, white and topaz colored enhancer pendant. Gold tone but marked 925. Cross flower shape measures 1 3/8" long and wide, not including bale. Bale is 3/8" long. Secure clasp allows you to attach this to any necklace. Black center with 4 pearly white hearts and topaz colored ovals around it. Smaller oval tear drops in the topaz color/stone around edges. So pretty! I thought it was a Nolan Miller or Joan Rivers enhancer, but it's not marked as such as far as I can tell, but I can't identify the jeweler's mark! Marked 925 on the back with some symbol next to it which I can't see clearly so don't know what it is or what it means. Lovely piece from my mother's estate.