Criteria Gran Columbia GoldOsisko

Outstanding shares 382M vs 385.4M

Fully diluted 623M vs 421.2M

Main Project Gold Ounces12.4M vs 12.7M

Grade 1g/t vs 1.1g/t

Cost of production per ounce $524 vs $319

Production per year 340k ounces vs 591k ounces

Life of Mine 21 years vs 10 years

Current MC 200M vs 3850M

Production 2015 vs May 2011

Location Columbia vs Quebec

Other gold production170K vs Nil

Based on Osisko's MC and comparison, GCM could see a 600% ROI in 3 years based on their fully diluted share float and Osisko's current MC.

GCM currently has a 10% share buy back program that would see up to 38M shares bought back for cancellation. Here is the last NR concerning this:

TORONTO, Oct. 13, 2011 /CNW/ - Gran Colombia Gold Corp. (TSX: GCM) announced today that it has to date purchased for cancellation a total of 4,192,000 common shares at an average price of $0.63 under its previously announced normal course issuer bid with theToronto Stock Exchange.

Under the bid, the Company is entitled to purchase for cancellation up to a maximum of 10% of common shares that comprise the Company's public float through the facilities of the TSX until the earlier of September 29, 2012 or the date on which the Company has purchased the maximum number of common shares permitted under the bid.

Hope this starts your DD Mike...

Glorieux