How Pearls are classified
Several factors are considered in order to classify a pearl. These factors can include lustre, colour, shape, size, surface clarity, nacre thickness, and matching. Most of these factors can make a big difference in the final value of the organically grown gem. Depending on the part of the world that a pearl is grown or cultured, can have a big impact on what the pearl will eventually be worth. For example, the pearls from the South Seas area usually have a lower lustre than other pearls. When the pearls are valued or examined, they are compared against pearls from the same area and not by the best that a pearl could be from another area of the world.
The lustre aspect refers to the inner glow that the pearl presents to the human eye. For a cultured pearl, the lustre is a vital factor in determining its quality. Lustre has separated the pearl from most other gems throughout history. The surface of the pearl is equally important because the fewer the blemishes the gem may have, the more the gem is valued. Just as with anything else, the closer to perfection the pearl can be compared, the more it will be desired. Pearls come in a variety of colours that can range from the deepest black to the purest white and all colours between.
The more uncommon the colour of the pearl, the more sought after it may be. Shape can play a large role as well because the pearl is organically grown and nature is not always perfect. Finally, size and the ability to match the pearl to others can change how each is classified.
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