Gemstone Cleaning Techniques Comments
Amber Damp cloth and dry. Warm water and detergent is also effective. Amber is an organic gem, sort of a fossilized and hardened form of resin from ancient pine trees.
Amethyst Warm water, detergent, and soft brush Most amethyst is heat treated to bring out best color, but it can crack as well as fade if exposed to high temperatures.
Aquamarine Warm water, detergent, and soft brush This blue beryl also receives heat treatments to bring out its blue color. Heat can still cause color fading.
Carnelian Moist cloth. Rub briskly with dry cloth. Since wax won’t adhere to this tough variety of quartz, ancient people famously used this material to make seals.
Citrine Warm water, detergent, and soft brush This heat-treated quartz will fade when exposed to heat.
Coral Damp cloth and dry. Another organic gem, made from the exudations of tiny marine animals. Extremely sensitive to flame and heat.
Diamond Ammonia-based cleaner. Warm water, detergent (grease cutting), and soft brush. Mechanical cleaning systems. (See Comments). Diamonds have the greatest hardness of any natural material, which means they resist scratches better than any other gem. These stones take heat well, too. However, mechanical systems