The stock ended the day at Rs 540.10, up 2.09 per cent, on the BSE. During the day, it rose by 3.95 per cent to Rs 549.95 -- its 52-week high.
At the NSE, shares of the company gained 1.57 per cent to close at Rs 540.85.
On the volume front, 5.25 lakh shares of the company changed hands at the BSE and over 19 lakh shares were traded at the NSE during the day.
The company is also planning to expand its refinery at Rudrapur, Uttarakhand with technology from Valcambi, he added.
Valcambi was owned by Newmont Mining Corporation and a group of Swiss investors.
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