Opal is a fragile gemstone that requires gentle care. It is softer than other gems like emerald and can be scratched or damaged if cleaned with anything hard or abrasive. When cleaning opal jewelry, one should use a soft cloth and be very careful, treating it like glass. Opal can also be damaged by extreme temperature changes from hot to cold, so it's best to store it in a consistent, moderate temperature. Proper care and avoiding abrasive activities while wearing opal can help preserve its natural beauty.