Ceylon sapphires

"At a private showing in the Louvre, Napoleon Bonaparte's great-great-grand niece Margot Steiner admires the painting of her famous ancestor while wearing a precious Ceylon sapphire necklace commissioned by the emperor himself. After getting caught in a commotion on the crowded staircase, however, Mrs. Steiner discovers that her necklace is gone and the suspicious young woman who started the commotion has melted away into the throng ... Rune Sara...