Author name: Diamond Pulse

  The Gemological Institute of America (GIA) has discovered a new mineral, which has been named crowningshieldite in honor of the late GIA researcher G. Robert Crowningshield, it announced at its International Gemological Symposium on Oct. 8. Crowningshieldite was first discovered in two diamonds from the Letseng mine in Lesotho. It was accepted as a new

This 28.59-carat rough diamond is the largest rough yellow diamond mined at any Alrosa deposits in 2018.   Moscow—Alrosa has uncovered its biggest yellow diamond yet this year. The Moscow-based diamond miner announced Monday that its Almazy Anabara subsidiary extracted a 28.59-carat rough diamond with a deep greenish-yellow hue. The company said experts at its

  OCTOBER 16, 2018 London—Gem Diamonds has recovered a 357-carat light brown rough diamond from its Letšeng mine in Lesotho, which the company says is the highest dollar-per-carat kimberlite diamond mine in the world. The discovery is the 13th diamond weighing more than 100 carats that the miner has unearthed in 2018 and the second-largest