Governor General David Johnston unveiled collector coins commemorating the birth of Prince George of Cambridge Thursday.

Johnston was joined by Heritage Minister Shelly Glover and Ian E. Bennett, president and CEO of the Royal Canadian Mint, to display the coins at a ceremony at Rideau Hall.

Prince George was born July 22 to Prince William and Catherine, the Duke and Duchess of Cambridge, at St. Mary’s Hospital in London.

He is third in line to the throne.

Last month, Prime Minister Stephen Harper announced the Canadian government had donated $100,000 to a Canadian child-focused charity, in honour of the birth of Prince George.

The prime minister also offered a handcrafted blanket that was "reflective of our country's rich and diverse culture.”

"These gifts symbolize our warm ties to our royal family, honouring our close and enduring relationship," he said in a statement.

Harper also joined Johnston, along with their wives Laureen and Sharon, in giving the prince a selection of Canadian children’s books.

A three-coin Royal Infant set can be purchased from the Royal Canadian Mint for $249.95, while a fine-silver coin is $74.95. The 25-cent coin is $24.95.