Certain basic precautions should be taken with all of your jewelry. However, some gemstones, as outlined in this section, require special care.
Take care to protect your jewelry from impact against hard surfaces and avoid contact with abrasive surfaces. Even a diamond can chip if hit with enough force or at just the right angle. Many stones such as amethyst, emerald, kunzite, opal, pearl, peridot, tanzanite and tourmaline are very delicate and easily abraded. Enamel can also chip or scratch when struck. Gemstones can scratch other gemstones and wear away at precious metals. Therefore, avoid stacking those rings and bracelets that would be vulnerable to such abrasion. Extreme temperatures, perfumes, cosmetics, ultrasonic cleaning and household chemicals can also damage jewelry.
To clean diamonds, use a mild solution of six parts water to one part ammonia and apply with a soft bristle brush.
If worn often, pearls should be cleaned and restrung professionally once a year. Between cleanings, wipe pearls gently with a damp cloth.