The company, which began exploring the area in March this year, said that specialists from its joint venture partner Alrosa are reanalyzing 80 tonnes of samples that were sent to South Africa.
Shares were up more than 5% after the firm posted higher output across all divisions, except for copper, and said market conditions for its diamond business had improved.
When Nevada became a state in 1864, an estimated 60 million acres were available for mineral entry in Nevada, of that total 16 million acres have been withdrawn.