Siberian diamonds
Alrosa calls for end to $25,000 ceiling on individual diamond exports.
Gem weights in at 27.85 carats, and may become the most expensive polished diamond in the company's history.
Like a Russian nesting doll, one diamond is inside another.
Giant gem goes on show as Siberian diamond company Alrosa issues a 16% stock float.
Fyodor Andreev leaves Alrosa, based in the Sakha Republic.
A deal worth at least $60 million a year is close between Russia's largest diamond mining company and the US giant Tiffany & Co.
The Popigai reserves are enough to keep the planet in diamonds for 3,000 years.
The Siberian producer - owned mainly by the Russian state and the Sakha government - hopes to shine on the international market.
Massive Siberian source of diamonds formed by an asteroid 35 million years ago can 'overturn entire world gem market'.
Sent to Siberia
Born in Siberia
