JSC Anabar Diamonds, a subsidiary of the ALROSA group, announced new details about the largest diamond mined in Russia over the past 10 years.
A gem-quality diamond weighing 390.7 carats was produced at the Mayat diamond mine in the Anabarsky district of the Republic of Yakutia.
Specialists from the Vilyuisk geological exploration expedition of ALROSA, ESO and the Gokhran of Russia studied the diamond and came to the conclusion that this stone is only a fragment of a larger diamond, making up about 25% of its original shape. The original diamond probably weighed up to 1,500 carats.
The diamond does not contain impurities in its structure, in particular nitrogen (quite common in natural diamonds), does not glow in ultraviolet rays and has only one small inclusion.
The diamond found is a light crystal of irregular shape, bordered by a yellow-brown halo - a combination of mass, shape and color that is unique today. Before this, the largest gem-quality diamond weighing 401 carats was found ten years ago, in 2013.
Theodor Lisovoy, Editor in Chief of the European bureau, Rough&Polished
