Ultrasonic: Usually safe.
Steamer: Risky.Heat: Poor; color change may occur with heat.Chemicals that harm: Hydrofluoric acid, ammonium fluoride. Clean amethysts with warm, soapy water and a soft brush or an ultrasonic cleaner. Amethyst Rings can become paler if it is out in the sun or under heat.Keep amethyst jewelry in a fabric-lined box and to keep other pieces from scratching it. With these tips, your amethyst should last you for many years.
!
SwissGemShop
Your source of loose Precious & Semi Precious Gemstones Gem quality Gemstones at sale price A lot of information to learn about Gemstones