The internationally recognized ranking system for pearls includes grades A, A+, AA, AA+, and AAA. AAA is gem-quality, a flawless, brilliant pearl with high lustre, high shine, and a perfectly unblemished surface. Six factors determine the quality, value, and aesthetic appeal of pearls: nacre, lustre, surface, shape, color and size.
Nacre
Nacre is the coating that an oyster forms around the nucleus of a pearl. Nacre thickness determines the longevity of the pearl and nacre quality determines how light reflects through the layers of the pearls.
Luster
Luster is a combination of surface brilliance and a deep glow. The luster of good quality pearls should be bright. One should be able to see his or her reflection clearly on the surface of a pearl.
Surface
The quality of a pearl is greatly affected by blemishes (also called spots or flaws). Pearls with higher luster conceal blemishes better.
Shape
There are three pearl shapes: symmetrical, spherical and baroque. The spherical is the rarest and most desirable. Symmetrical pearls include teardrop or pear-shaped pearls and are desirable. Baroque pearls are irregularly shaped and often the least expensive.
Color
Pearls come in a variety of colors, from white to black and every shade in between. Body color is the predominant basic color of the pearl. Body colors include white, pink, cream, yellow or gold.
Size
Pearls are measured by their diameter in millimeters. Tiny seed pearls can be smaller than 1 millimeter, while South Sea pearls as large as 20 millimeters have been found. If all other factors (nacre, luster, surface, shape and color) are equal, the size of a pearl will determine its value.
Personal Care Products Can Damage Pearls
Cosmetics, perfume and hairsprays all contain chemicals that can dull the luster of a pearl. The natural acids contained in body oils and perspiration can damage pearls in the same way. It is best to put the pearls on after applying makeup, perfume and hair spray.
Simple Steps to Protect Your Pearls
Wipe the pearls with a soft damp cloth after wearing them. Periodically, pearls should be washed with a mild soap.
Store Pearls Separately
Always keep your pearls separated from hard jewelry items, to prevent them from being scratched. Peals are best kept in a soft cloth pouch or in a softly lined jewelry box or compartment.
Editor: Li Jing
Email to Friends
Print
Save