In years past, Kate Middleton’s famous sapphire and ... without her engagement ring, and Ella Citron-Thompkins, a jewelry expert from Diamonds Factory, shed some light as to why to Hello!, ...

Among them are a 8.2-carat blue sapphire ring, set to go for anywhere from $300,000-$500,000, and a 10.95-carat round brilliant-cut diamond set in gold, which will go for somewhere between $40,000 ...