Sapphire and Diamond Engagement Ring from Blue Nile, $1,725 Blue Topaz and Diamond Engagement Ring from Ice.com, $195 Fantasia Sapphire and Cubic Zirconia Engagement Ring from Neiman Marcus, $350 ...

The Princess of Wales' engagement ring boasts a huge oval Ceylon sapphire that weighs 12 carats. The blue stone is surrounded by 14 solitaire diamonds and set in 18-karat white gold.

The color blue was the theme of the 211-lot Magnificent Jewels sale at Sotheby’s New York on Tuesday as blue diamonds and sapphires attracted the most attention from bidders. Among the notable ...