The value of South Sea pearls is determined by 5 factors: size, shape, color, luster and surface.
Size: The size influences the value. The average size of South Sea pearls is between 9-20 mm, and the average is 12 mm. The bigger the size of the pearl, the higher its value.
Shape: Pearls, being an organic gem produced by the Pinctada Maxima Oyster, present all kinds of shapes. Baroque, pear-shaped, round, semicircular, circular... Traditionally the most valued size has been the perfect round, for pearl necklaces. But new tendencies in the artisan creation of jewelry and thanks to jewelry designers, precious jewelry is created with any type of pearl.
Luster: The most valued luster is the metallic and luxurious luster, where the face of the one who is looking at the pearl is reflected. This characteristic only occurs in some pearls.
Color: This characteristic will depend on the type of pearl. In the white pearls of the South Seas it should be white metallic and luxurious, while in the golden pearls of the South Seas it should be dark and golden.
Surface: The surface of the pearl or also known as "skin". Pearls, being a natural gem, it is normal that they present small spots known in the pearl world as "fish bites". The cleaner the pearl surface is, the higher its value will be.