How to Clean Black Diamonds

Black diamonds are real diamonds that are black in color. Unlike colorless diamonds, they are opaque and don't shine or glisten. Containing traces of graphite, hematite and magnetite elements, these diamonds appear black to the human eye. These gems are highly sought after by people who are fond of rare stones, which is just one good reason to keep yours in the best of condition. Follow the steps mentioned below to keep your black diamond clean.


  1. 1
    Soak the black diamond in hot water for 10-15 minutes. This will ensure that any layer of oil or grime is loosened.
  2. 2
    Make a cleaning solution. Add thinned ammonia to one quarter part of plain water.
    • If preferred, you can instead buy a colored diamond cleaning solution that is available at many jewelry stores,
  3. 3
    Pour this solution in a flat dishpan. Place the black diamond into the solution for nearly an hour. For the best results, check that the black stone is completely covered by the solution.
  4. 4
    After an hour, take out the diamond. Clean it with a clean, soft-spiked toothbrush. Clean all the sides of the stone to remove any grime from it.
  5. 5
    Wash the diamond with pressured hot water to get rid of the remaining solution film on it,
  6. 6
    Buff up the stone using a soft cloth. Use a plain cloth to avoid getting any scratches on the black diamond.
  7. 7
    Finished. Store your black diamond(s) jewelry as for all diamond jewelry (explained here).


  • Unlike colorless diamonds, the 4Cs of assessing diamond quality (color, cut, clarity and carat), do not apply to black diamonds.

Things You'll Need

  • Cleaning solution made from thinned ammonia and water; or a commercial preparation
  • Cleaning cloth (soft, suitable for jewelry)
  • Flat dishpan
  • Soft-spiked toothbrush
  • Pressured hot water for cleaning
  • Soft buffing cloth

Article Info

Categories: Jewelry and Watches