rubies

10 most luxurious but useless items in the world
Golden toilet paper, diamond contact lenses or gem necklace for dogs ... are suitable items to display more than used.
Ruby and jade illuminate the history of the Earth
The relationship between rubies and jade with special geological conditions forms them, helping us understand more about the history of tectonic plates on Earth.
Adventure of mysterious red diamond
The American Museum of Natural History has just exhibited one of three rare red diamonds in the world.