Like any valuable product, diamonds must be properly maintained for them to remain beautiful, and to keep their value. Failure to keep your diamonds in the best possible condition could ultimately cause your diamond jewelry to depreciate over time.
Although diamond is the hardest natural substance on Earth, diamonds are not immune to small chips and cracks, which can ruin the stone. Diamond jewelry should never be worn at the gym or while playing any kind of a sport. You should take your precious jewelry off if you're doing housework, or any activity that could lead to bumps on furniture or other scratches.
Also makeup can damage jewelry. Put your makeup on before you put on your jewelry - that can help to avoid transferring chemicals to your precious pieces, and enhance their beauty and sparkle for your evening on the town.