An Edwardian Platinum, Natural Pearl and Diamond Pendant, Black Starr & Frost, containing one round button pearl measuring approximately 8.61 mm in diameter and numerous old mine and round single cut diamonds, suspended from a separate but period correct platinum, gold and seed pearl necklace with textured pendant loop and gather containing numerous old mine cut diamonds joined with a later 14 karat white gold spring ring clasp, the necklace and pendant containing diamonds weighing approximately 1.07 carats total. Stamp: B.S.&F.Hand inscribed: 50596.Accompanied by a Gemological Institute of America pearl identification certificate number 1172354147, dated October 27, 2015, stating Natural Pearl, Environment: Freshwater, Mollusk: Unio species, Treatment: No indications of treatment, Shape: Button, Bodycolor: White. 9.20 dwts.