Gemmology: 6 precious stones that have hit the market recently

The National
At a whopping 887 carats, La Gloria is one of the largest rough emeralds in the world, overtaking the 857-carat Gachalá displayed in the ­Smithsonian ­Institution in Washington.
At a whopping 887 carats, La Gloria is one of the largest rough emeralds in the world, overtaking the 857-carat Gachalá displayed in the ­Smithsonian ­Institution in Washington.
Part-owner by Gemfields, the Montepuez Ruby Mine in Mozambique is one of the most ­significant ruby deposits to have been ­discovered in recent times. Courtesy Gemfields
Part-owner by Gemfields, the Montepuez Ruby Mine in Mozambique is one of the most ­significant ruby deposits to have been ­discovered in recent times. Courtesy Gemfields
A peacock pear from the Robert Wan group. Courtesy Robert Wan
A peacock pear from the Robert Wan group. Courtesy Robert Wan
The Pink Star, the 59.60-carat, oval, mixed-cut pink diamond, is the largest internally flawless fancy vivid pink diamond that the Gemological Institute of America has ever graded. Courtesy Sotheby’s
The Pink Star, the 59.60-carat, oval, mixed-cut pink diamond, is the largest internally flawless fancy vivid pink diamond that the Gemological Institute of America has ever graded. Courtesy Sotheby’s
The Stotesbury Emerald weighs about 34.40 carats and has been in the possession of some of ­history’s most avid jewellery collectors. Courtesy Sotheby’s
The Stotesbury Emerald weighs about 34.40 carats and has been in the possession of some of ­history’s most avid jewellery collectors. Courtesy Sotheby’s
The Mountain Star Ruby collection collectively weighs in at 342 carats. Courtesy Guernsey’s
The Mountain Star Ruby collection collectively weighs in at 342 carats. Courtesy Guernsey’s