SHANGHAI, May 22 (SMM) - The dysprosium oxide prices surged last week amid vigorous market trades, and the mainstream traded prices climbed from 1.99-2.01 million yuan/mt the week before to 2.05-2.07 million yuan/mt last Friday, up around 3%. Dysprosium-iron alloy traded prices rose slowly from 1.88-1.89 million yuan/mt to 1.92-1.94 million yuan/mt, up about 2.4% as goods were mainly delivered for long-term contracts.