HOW TO CHOOSE THE RIGHT DIAMOND

The 1,109-carat Lesedi La Rona, a white diamond discovered in Botswana, at an auction preview. Usually such gems are sold by sealed bid. It is expected to fetch over $70 million.
The Koh-i-Noor is set in the middle of the front cross of a crown most recently used by the Queen Mother, who died in 2002 at age 101.
The adage that a diamond can be a best friend has lost some sparkle in recent years.