People have treasured gems for many reasons throughout history. Some of these reasons include the use of gems as beautiful decorative ornaments, religious symbols, and amulets and good-luck charms. Gems have also been used for barter and medicinal purposes. Gems have even been used as investments by some people. For others, gems have been used to display wealth, status, and power. 

     In centuries past, royalty often owned the finest gems. Some of these gems still exist, and their histories are a fascinating mix of fact and legend. Take, for example, the Black Prince’s Ruby and the Timur Ruby. Both are set in the Imperial Crown of the British crown jewels.

(Credit : http://faculty.washington.edu/)