Saurabh Gadgil has achieved billionaire status after the stock market listing of PN Gadgil Jewellers, his family's 192-year-old company. Shares of the company have surged 61% since the IPO in September, taking Saurabh's net worth to $1.1 billion, Bloomberg reported. The 47-year-old sixth-generation jeweller is PNG's Chairman and Managing Director, who inherited the company more than a decade ago.