Estate Deep Blue Sapphire and Diamond Drop Earrings in 18K Gold and Silver. Oval rose cut sapphires are deep royal blue in color. They measure around 9 X 12MM each. Dainty lace style settings dangle from diamond florets (estimated twt diamonds, 0.45 carats). Earrings are mostly gold with oxidized silver around the diamonds. Gold post and friction backs, for pierced ears.