September Birthstone - Sapphire Crystal Adjustable Sterling Silver Promise Ring - Pear Engagement JewelryThe deep blue crystal of this dainty solitaire ring winks and shimmers in the light, played up perfectly by the smooth finish of the adjustable sterling silver ring base. The styling is very classic. This ring is adjustable from approximately a size 5. 5 to a size 7 (US Standard). The stone is a lovely pear shaped Swarovski Crystal in a hypnotic, rich sapphire blue. It is dainty, only 7x10mm in size. Sapphire is the traditional September birthstone,