Diamond, ruby, sapphire and emerald jewelry is remarkably easy to maintain as long as it is kept clean and stored in a soft pouch or individual bag to prevent scratching from contact with other hard materials.
Jewelers have professional grade ultrasonic machines and steamers for cleaning, but portable at-home models are typically less effective. Liquid jewelry cleaners such as Hagerty’s, available online and in most grocery stores, is an excellent ready-made cleaning solution that comes with a small soft brush, but a toothbrush and homemade mixture of warm water, a squirt of dish soap to cut grease and a tiny splash of ammonia to prevent spots works just as well. Soak diamonds, platinum, colored stones and even gold, but NEVER PEARLS, for 5 minutes or longer in the solution, then with the sink drain closed, rub with an old toothbrush under warm running water to remove any remaining dirt or oily residue and dry with a soft towel. You may like to go the extra mile and dry your pieces for a few short seconds with a hair drier to avoid water spotting.
Over time, lotion, perfume and skin oils can damage the surface and lustre of pearls. To prevent that, after wearing gently rub pearls with a damp cloth to maintain their natural beauty and shine. With wear over time, the silk strands may stretch and space between the pearls may appear, indicating the need to have the pearls restrung to avoid unexpected breakage and loss.