A rare Burmese ruby weighing 25.59 carats became the most expensive gem which is not a diamond, when it was sold for a world record $30 million (28.25 million Swiss francs) at auction in Geneva on Tuesday. Sotheby’s auction house had a pre-sale estimate price of $18.85 million (17.5 million Swiss franc) for the ‘Sunrise Ruby’, which has the extremely rare grading of “pigeon’s blood” color. Two