Diamond necklace inspection for cleaning and care
https://astro-wiki.win/index.php/Diamond_necklace_inspection_for_cleaning_and_care
Before cleaning your diamond necklace, inspect it under bright light with a jeweler's loupe to spot loose prongs or chipped stones. Gently brush the setting with a soft toothbrush and mild soapy water, then rinse thoroughly. Avoid steam cleaners or harsh chemicals that can damage delicate clasps or soften the gold over time.