A reputable jeweler is your best source for cultured pearls. A knowledgeable jeweler can explain how to balance a number of quality and size variables to get the best selection available within a certain price range. You will be able to evaluate pearls on the basis of the following criteria: Note: Your computer screen resolution and color setting may affect pearl color, lustre and actual sizes as compared to viewing with the naked eye.
Lustre

Surface
Cleanliness of the pearl surface refers to the absence of disfiguring spots, bumps or cracks. A pearl with a clean surface will have a higher value than a spotted, bumpy or cracked one.
Shape

Color
Rose Silver/White Cream Gold Blue/Gray Cultured pearls occur in colors from rosé to black. While color is a matter of preference, rosé or silver/white pearls tend to look best on fair skin tones, while cream and gold-tone pearls are flattering to darker complexions.
Size
Measured by their diameter in millimeters, the average cultured pearls sold today are between 7 and 71/2 millimeters. Generally, the larger the pearl, the more valuable it will be.