Russia's largest diamond miner Alrosa discovered a unique
diamond weighing 158.2 carats and worth over $1.5 million,
the company said Tuesday.
Alrosa is one of the world's largest diamond companies, accounting for about 28 percent of global production, and produces 97 percent of all diamonds in Russia. The company boasts proven diamond reserves that enable it to maintain diamond production for over 25 years.