|When it comes to ruby and sapphire, there is no place more famous than Myanmar’s Mogok Stone Tract.|
Off-limits to foreigners for more than 40 of the past 50 years, the door has once again opened a crack.
Workers setting dynamite charges at Burma’s Sagyin ruby mines, July 2013. Note the clay band in the marble. It is thought that this clay provided the alumina necessary for the formation of ruby and spinel.