In a recent article called “5 Reasons Why Diamond Mining Stocks Have Been Under Pressure”, diamond analyst Paul Zimnisky looks at the reasons why, from February 15 to March 13 of 2017, a market-cap weighted aggregation of diamond miners in US dollars including Alrosa, Petra Diamonds, Dominion Diamond Corp, Gem Diamonds Ltd, Lucara Diamond, Stornoway Diamond, Firestone Diamonds and Mountain Province was down 14.3%.