For cleaning peridots at home, create a gentle solution by adding mild dishwashing soap liquid to warm water. Immerse your jewellery in the liquid for 20 – 30 minutes and then use a soft toothbrush to gently remove dirt and debris, paying attention to all sides and edges, including the lower part of the gem where dirt tends to accumulate. Rinse the jewellery thoroughly with clean water and dry it with a soft, lint-free cloth.