Two pairs of bejewelled Mughal-era spectacles set with diamond and emerald lenses are expected to fetch up to $3.5 million each when they are auctioned in London on Wednesday, Oct. 27. The glasses were commissioned by an unknown 17th-century prince, auction house Sotheby’s said, with the precious stone lenses believed to boost spiritual enlightenment. One pair, named “Gate of Paradise,” features emerald lenses set in diamond-mounted frames. The second, called “Halo of Light,” has diamond lenses set in diamond-mounted frames. The lenses are said to date from the 17th century while the frames are from the 19th century. “There are so many stories behind these spectacles. The emeralds came all the way from Colombia in the 17th century through Portuguese merchant ships to the Mughal empire, the Mughals absolutely loved gemstones,” Alexandra Roy, specialist in the arts of the Islamic world at Sotheby’s, told Reuters. “The diamonds came from the …