the Imperial State Crown is the one sitting on HMQs coffin and has the Cullinan II diamond (among many others) the one in the article (containg the Koh-I-Noor)

the Imperial State Crown is the one sitting on HMQs coffin and has the Cullinan II diamond (among many others) the one in the article (containg the Koh-I-Noor) is the Queen Mother's Crown