IDEX magazine one of the leading diamond industry magazine published an article on Gemisimo.com:

"Gemisimo.com, a B2C online price comparison site for loose diamonds was recently launched. The site features approximately 300,000 certified loose diamonds, from various vendors, with an estimated total value of $2.6 billion. It also includes an automated crawling and tracking system to ensure that search results are up-to-date." 

The full article can be seen here.