Aquamarine needs to be cleaned often to keep its brilliant sparkle. A thorough, soft brush scrubbing with a commercial jewelry cleaner or liquid detergent and water is sufficient if done after every three or four wearings. Aquamarine jewellery can be carefully cleaned using warm 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. We stress that reasonable care should be taken when cleaning emeralds, as washing with strong detergents could cause any oil to be diluted or removed, requiring the stone to be re-oiled. Aquamarines do not like excessive heat, and although they can tolerate temperatures above 100c (the boiling point of water), it is advisable to use warm water rather than hot water, to reduce the dangers of thermal shock. It is not advisable to clean aquamarine in an ultrasonic tank. We sometimes risk it with our own stock, but we would never clean a large or valuable aquamarine which did not belong to us, in an ultrasonic machine. Aquamarine is brittle and sensitive to pressure. It is also sensitive to high temperature and may loose color if heated to high. Care must be so taken when making some aquamarine jewelry.
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