The 5.7ms pulsar PSR J1719-14 shows timing variations on a 2.17 hour timescale. These can be explained with a Jovian planet. However, because of the planet's short distance to the star, its density has to be more then 20 times that of Jupiter. The planet is most likely a remnant of a binary star which avoided complete destruction. The chemical composition, pressure and dimensions of the planet indicate that it is crystallized, or in other words, a very big diamond (Bailes et al 2011). Link to scientific paper Your name Note: Your commit will be vetted before it is merged into the public version. It is crucial that you include a link to a scientific publication. For more information on the meaning of the different datafields see the readme file in the Open Exoplanet Catalogue repository on github.