 Barrick Gold Corp. is the country's largest gold mining company by several measures of size.After growing 3.35% on the year, on November 8, 2012 Goldcorp leapfrogs Barrick Gold in capitalization - Barrick lost 25% of its market value that year.In the following table are Canada's 10 highest valued gold mining companies for 2010 as well as 6 other mid cap companies.