Amber Amber is occasionally heat treated or dyed to enhance its color. Use only warm soapy water to clean. Avoid exposure to chemicals and high heat. Amethyst Warm soapy water is usually the best way to clean an Amethyst. Avoid using household chemicals and harsh cleaning solvents as they can damage jewelry.
Ultrasonic cleaners are usually safe, but avoid steam cleaning.
Aquamarine This type of stone is often heat-treated to remove traces of yellow and to intensify its rich blue color. Clean aquamarine jewelry with warm soapy water and a soft brush. This gemstone can scratch, so store it carefully when you're not wearing it. Cleaning a cat's eye with warm soapy water and a soft brush is usually sufficient. Avoid ultrasonic and steam cleaners.