As part of its plans to expand into that market, Alrosa will hold its first “True Colour” auction of coloured polished diamonds, during the Hong Kong Gem & Jewellery Fair taking place this month.
But rising gold imports could widen India's trade deficit and further pressure its currency, the rupee, which hit a record low of 71.95 against the dollar on Wednesday.
A vote by the striking workers on whether to accept a new workplace agreement is due to close on Thursday, with the union anticipating a strong "no" vote.
Deal gives Orion mine access to mineral rights for more than 80,000 hectares of land in Northern Ireland, which includes one of the world's top ten undeveloped gold deposits by grade.
BHP will gain access to SolGold's Cascabel project, in northern Ecuador, believed to have the potential to become one of the largest copper-gold assets ever discovered.