* Russia's gold-fx reserves add $5.2 billion in latest week * Euro asset revaluation, central bank buys are main drivers (Adds detail, background, economist quotes) MOSCOW, June 16 (Reuters) - Russia's gold and foreign exchange reserves rose to $528.0 billion in the week to June 10, the highest since the economic crisis of 2008-09, central bank data showed on Thursday. Russia, which holds the world's third largest reserves, has increased them by 10 percent so far this year, compared with a 3 percent increase in the same period last year. The reserves tumbled during the crisis when the central bank haemorrhaged a third of the stash in propping up the rouble during a managed devaluation. In the latest week, Russia's reserves rose $5.2 billion, mainly due to higher euro asset values and currency purchases by the central bank. The Bank of Russia's purchases and upward revaluation of securities accounted for $1.33 billion of the amount. The other $3.9 billion came from a positive revaluation of the euro, British pound, yen, and Canadian dollar, said Vladimir Tsibanov, economist at Rosbank.

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