DE BEERS, a global leader in the diamond industry, on Wednesday announced it will foray into the retail segment with the opening of 15 Forevermark brand stores in India in the current year.De Beers India Managing Director Amit Pratihari said the plan is to establish 100 retail stores by 2030 with a revenue target of $1 million.“We are investing in retail through Forevermark jewellery brand. We will open 15 stores, eight in Delhi and the rest in Mumbai this year,” he told reporters here.