In May 2015 , it sold at auction in Switzerland to an anonymous buyer for US $30 million .
The Sunrise Ruby is the world 's most expensive ruby , most expensive coloured gemstone , and most expensive gemstone other than a diamond .
In May 2015 , Sunrise Ruby sold at auction in Switzerland to an anonymous buyer for US $30 million .
The Sunrise Ruby is the world 's most expensive ruby , most expensive coloured gemstone , and most expensive gemstone other than a diamond .