This will loosen dirt, oil and grime. If there is still a lot of grime stuck to the diamonds, you could let them soak a little longer., Mix one-part diluted ammonia to three parts water. Pour this solution into a flat dishpan.The ammonia and water cleaning solution is safe for hard gemstones, such as diamonds, rubies and sapphires.For soft gemstones like opals or turquoise, you should use a milder cleaning solution instead of the ammonia solution. You could use water and a mild, non-detergent soap.If you prefer, you can buy a colored diamond cleaning solution from a jewelry store.
If you are not sure which cleaning solution to use, you should use the cleaning solution recommended for the softest gem on your piece of jewelry., Place the diamond in the cleaning solution. For best results, check that the black stones are completely covered by the solution. Remove them after one hour., Clean all of the surfaces of the stones to get rid of grime and debris.Use a light, gentle touch with a soft bristle toothbrush.


Avoid scrubbing too vigorously, since tension settings and prongs could be damaged during the scrubbing process., If you are working under a kitchen or bathroom sink, make sure the drain is in place. Carefully rinse the black diamonds., Use a lint free-cloth to get it sparkling clean. Store your jewelry, and care for it like would any piece of diamond jewelry.
Soak the black diamonds in hot water for 10-15 minutes.
Make a black diamond cleaning solution.
Soak the diamonds in the solution for one hour.
Scrub the black diamonds with a clean, soft bristle toothbrush.
Rinse the black diamonds under hot water.
Buff the stone using a soft cloth.
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