What precautions should I take when cleaning precious stones?

- Do not clean jewellery in a sink, as it could slip out of your hands and down the drain.

- Avoid using metal objects, such as pins or tweezers, to remove embedded dirt and clean hard-to-reach nooks and crannies - the jewellery could be scratched or damaged.

- Use unsuitable cleaning products that are not suitable for metals and/or stones.