The Cream legend passed away on Saturday (25.10.14) at his home in Suffolk, East Anglia, and his former bandmate has paid tribute to his friend's talent.
Eric wrote on his Facebook page: ''He was a great musician and composer, and a tremendous inspiration to me.''
The guitarist's website also shared a lengthy history of the bassist's musical career.
And Cream's drummer Ginger Baker described Jack, 71, as a ''fine man''.
He said via his fan club: ''I am very sad to learn of the loss of a fine man, Jack Bruce... My thoughts & wishes are with his family at this difficult time.''
Jack occasionally performed with Ringo Starr's All-Star Band and the Beatles drummer has sent his condolences to the musician's family.
He tweeted: ''We lost Jack Bruce today an incredible musician writer and a good friend peace and love to all his family.''
As well as his former bandmates, other renowned bassists have publicly paid tribute to Jack on twitter.
Geezer Butler of Black Sabbath wrote: ''So sad to hear of Jack Bruce passing. My biggest influence and favourite bass player. Thank you, Jack. RIP (sic)''
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