Sapphire jewellery can be cleaned using hot soapy water, or detergent, rinse thoroughly afterwards as detergents can cause dermatitis and allergic reactions. Enzyme cleaners should be avoided for the same reasons. Brushing with an old tooth brush to remove dirt and grease will also help. Cleaning agents containing chlorine may have a detrimental effect on low carat gold alloys, so are best avoided.
Ultrasonic: Usually Safe
Steamer: Usually Safe
Heat: Poor; may sometimes Improve color, but may cause loss of color
Chemicals that harm: Borax