Tanishq opens large-format outlet in Mumbai

"While a large number of countries around the world continue to talk about securing raw material supply, China is actually doing something about it."

Gemfields said in a statement that "groups associated with the illegal mining and trading of rubies have taken advantage of the political unrest".

CFIUS said on Monday that allowing Nippon Steel to take over US Steel could result in lower domestic steel production.

Rival Young Poong and private equity firm MBK Partners have been trying to take over the world's biggest zinc refiner.