James Tassie ( 1735 - 1799 ) was a British painter. James Tassie s works have been put up for auction numerous times, with realized prices surpassing estimated prices, varying from 97.93 USD for A Collection of moulds for `Tassie Gems` in 2004 to 1688.91 USD for Sir William Hamilton in 2005 , based on the size and medium of the artwork.