Once it's cut and polished, it will also be among the most sparkly -  deemed to possess exceptional clarity and transparency by the Gemological Institute of America, its unusual name means 'light' in Botswana, where it was discovered in Lucara mine last year.

Measuring 66.4mm x 55mm x 42mm, the diamond - the biggest to be discovered in over 100 years - is estimated to be three billion years old and is expected to fetch upwards of $95 million when it goes to auction at Sotheby's in London tomorrow.

A diamond the size of a tennis ball goes to auction tomorrow

Who has that kind of cash, you ask? You'd be surprised - last month the same mine sold an 813-carat rough diamond privately for just over $85 million - that's about $105,483 per carat - and just last year, Hong Kong billionaire Joseph Lau dropped $65 million on a 12.03-carat rock for his seven-year-old daughter. 

A diamond the size of a tennis ball goes to auction tomorrow