Presented by fine jewellery expert and regular Telegraph Luxury contributor Joanna Hardy and filmed on location at Goldsmith’s Hall, this episode discusses the Cullinan Stone - a large rough diamond of 3,106 carats which was cut into nine principle stones and 98 smaller ones. Get the latest headlines: www.telegraph.co.uk/ Subscribe: www.youtube.com/subscription_center?add_user=telegraphtv Like us on Facebook: www.facebook.com/telegraph.co.uk Follow us on Twitter: twitter.com/telegraph Follow us on Google+ plus.google.com/102891355072777008500/ On site: www.telegraph.co.uk/luxury/jewellery/priceless-pieces-the-cullinan-diamond/ Telegraph.co.uk and YouTube.com/TelegraphTV are websites of The Daily Telegraph, the UK's best-selling quality daily newspaper providing news and analysis on UK and world events, business, sport, lifestyle and culture.