Images: Marco Bicego Royally Ravishing: Amethyst of the Past February’s birthstone, amethyst, was once as exclusive as ruby (for comparison, some rubies rank among the most expensive gemstones in the world, with record prices over $1,000,000 per carat). Sourced mainly out of Russia until the 19th century, large deposits of the gem were later found in Brazil, paving the road for greater accessibility to the stone reserved for nobility. T