A gem quality blue diamond was mined in Russia for the first time weighing 2.74 carats. According to Alrosa, the crystal was mined from the Nakin Bikotia kimberlite field. They clarified that for the first time in decades, experts encountered a type IIb blue diamond - one of the rarest and most expensive stones on Earth, whose color is due to the presence of boron.

A gem quality blue diamond was mined in Russia for the first time weighing 2.74 carats. According to Alrosa, the crystal was mined from the Nakin Bikotia kimberlite field. They clarified that for the first time in decades, experts encountered a type IIb blue diamond - one of the rarest and most expensive stones on Earth, whose color is due to the presence of boron.