The Polar Star diamond is a 41.28 carat brilliant cushion-cut diamond, from the Golconda region in India. Its lower pavilion is arranged as an eight-pointed star, hence its name, from Polaris, the Northern Star. It is claimed that "the symmetry of the cut is so precise that it can be balanced on its culet" It is a rare type IIa diamond, meaning that it contains no nitrogen or boron. It is likely D or E color ("colourless"), with a trace of pink, and has blue fluorescence.