Tiffany & Co. Angela Cummings Feather with Diamonds 18K and Platinum

Tiffany & Co Angela Cummings Feather with Diamonds 18K and Platinum. Original 18k chain.
 At the back of the pendant is stamped "Cummings" and "Tiffany & Co 18k IRID PLAT". The chain is Tiffany 18k and on the clasp, you can see 18k mark. There are 5 Diamonds on the Feather. Total weight is 3.9g.