Neither Princess Diana or Meghan Markle own the the most expensive royal engagement ring. Someone outside the House of Windsor does.

Princess Kate has preformed a subtle U-turn on her choice of engagement ring during the Commonwealth Day service at ...

Walsh pointed out that due its ties to Diana, Kate's ring is the priciest in the royal collection. "When you also consider ...

Heritage pieces tweaked for modern times? Delicate creations inspired by nature? A Leonardo DiCaprio cameo? Jewelry seen in ...

Learn about the revolutionary enhancements in sapphire that could transform smartphone screens and eyeglasses.

1.25 x 0.88 in. (3.2 x 2.2 cm.) ...

The ring, discovered by a metal detectorist in the U.K., is estimated to sell for between $19,000 and $23,000 at auction.

Colorless to yellow to intense orange sapphire will react quite differently to light or heat depending on the nature of the material and the origin of the color. The authors determined that there are ...

The P/B ratio shows how a stock's market price compares to its book value. It helps gauge whether a stock is undervalued or overvalued relative to its net assets.