 | The Sunrise Ruby, a 25.5-carat stone, made history in 2015 as the most expensive colored gemstone ever sold at auction, going for $30.3 million. Ruby's rich, red fluorescent glow comes from the element chromium. |
 | A ruby is the traditional 40th anniversary gift. In 1966 Irving Berlin purchased a ruby for his wife, Ellin, for their 40th anniversary. The ring made $ 1.1m against a $600k high estimate this year. |  |
