Massive Siberian source of diamonds formed by an asteroid 35 million years ago can 'overturn entire world gem market'.

Diamonds of Yakutia found a fake gem - and the real $107,000 jewel vanished. 

New enterprise will work with rough diamonds from Alrosa, which holds the world's largest reserves in Yakutia.

Alrosa to announce timetable within two weeks, with exchange likely open by 2016.

The Siberian producer - owned mainly by the Russian state and the Sakha government - hopes to shine on the international market.

Fyodor Andreev leaves Alrosa, based in the Sakha Republic.

Current president of Sakha-based company leaves after 'difficult' relationship with senior officials in Moscow.

Proceeds of a sale of a stake in Alrosa diamond giant will benefit local people, vows governor.

The world's top diamond producer is on course for a $10 billion valuation, say analysts.