The Mineral and Gem Trade

There are many interesting international aspects to the history of gems. Economies of countries have been based on gem production. Though not usually as bad as precious-metal mines, the effect of gem mines on the environment can be very negative. The Kimberley mine 

Diamonds from Sierra Leone by Kanye West won a 2006 Grammy for Best Rap Song. 

Blood Diamond starring Leonardo DiCaprio and Jennifer Coimelly was released by Warner Brothers in late 2006. 

Natural green sapphire Glue layer (colorless) Vemeuil yellow sapphire 

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