White Dwarf Star Crystalizes into Giant Diamond in Nearby Galaxy.

Scientists have discovered a white dwarf star, HD 190412 C, that is in the early stages of crystallizing into a celestial diamond. The star's temperature and metal core composition put it in the range of a crystallizing white dwarf, and its age was calculated to be about 4.2 billion years. The star is part of a quadruple star system called HD 190412, and its distance from Earth was determined using data from the Gaia Mission. This is the first known case of a crystallizing white dwarf with a known age, and other similar systems may exist nearby.