It remains the largest alluvial diamond ever discovered in North America.

Some exploration for alluvial diamonds takes place.

Since 1869 the various gravels along the Vaal River have been worked intensively for their content of high-grade alluvial diamonds.

This area is quite rich in alluvial diamonds deposited along the coast by the Orange River.

For example, mining of coastal dunes for alluvial diamonds could lead to habitat degradation.

It is considered to be the largest alluvial diamond from North America.

Ofir commissioned two mining sites in Mbaiki and Boda for alluvial diamonds.

It ranks as the third-largest gem-quality diamond and the largest alluvial diamond ever discovered.

Angola's mines produce some of the finest gem-quality alluvial diamonds in the world.

He also went as a cameraman on an expedition to Venezuela in search of alluvial diamonds, ostensibly as part of a documentary crew.