In this handout photo released by ALROSA Company, a diamond with another diamond moving freely inside mined in Yakutia is pictured, in Republic of Sakha (Yakutia), Russia. Due to its peculiarity, the stone resembles a traditional Russian Matryoshka doll. According to scientists, diamond may be over 800 million years old. Despite its complex structure, it weighs 0.62 carats (0.124 grams). Editorial use only, no archive, no commercial use.