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This group of cultured pearls displays some of the exotic colors pearls can exhibit. - Blaire Beavers, courtesy Takayas Mizuno So how can you tell if the pearls you own are natural or cultured? Unfortunately, you won’t be able to spot the difference without proper gemological and laboratory tests. Testing methods such as X-rays, energy-dispersive X-ray fluorescence, laser light, and Raman spectrometry will help separate natural from cultured pearls. What Affects The Value Of A Pearl? As an organic gem, nearly all cultured and natural pearls have some degree of imperfections such as bumps, pits, scratches, spots, and wrinkles on their surface. Blemish-free pearls are extremely rare. So the fewer and less visible blemishes a pearl has, the higher its value when all the other value factors are equal.

When other value factors are the same, the higher the lustre, the more valuable the pearl is. The lustre of some fine quality pearls can be so intense that it is almost metallic. To begin the process, a skilled technician takes mantle tissue from a sacrificed mollusk of the same species and inserts a shell bead along with a small piece of mantle tissue into a host mollusk’s gonad, or several pieces of mantle tissue without beads into a host mollusk’s mantle. If a bead is used, the mantle tissue grows and forms a sac around it and secretes nacre inward and onto the bead to eventually form a cultured pearl. If no bead is used, nacre forms around the individual implanted mantle tissue pieces. Workers tend the mollusks until the cultured pearls are harvested. Pearl Types Try to look for the presence of overtone or orient the next time you look for fine quality pearls. And be very careful with those that are artificially coloured to mimic some of the high value colours mentioned above. Pearls with dye treatments are worth less than those with natural colours. What Is The Most Valuable Pearl Shape? In this guide we’re going to show you everything you need to ascertain what your pearls are worth. The Basic Rule To Buying PearlsOne thing you might not realise is that saltwater pearls like Akoya, South Sea and Tahitian are more likely to be round than freshwater pearls. Why? Because in saltwater pearls a round bead is inserted to encourage pearl to grow into a round shape whereas a piece of tissue is used in freshwater pearl cultivation. Now you can see - it is much rarer for a natural pearl to form a perfectly round shape than its cultured counterpart. Regardless of how pearls are formed, whether natural or cultured, most pearls harvested have an average to low quality. Fine quality pearls are very rare. This is largely due to the nature of pearl growth inside the oyster. The oyster secretes nacre slowly to coat the intruder layers after layers. It is the same substance that makes mother-of-pearl, the shiny surface on the inner side of the shell. As an organic gem, these layers of nacre are not always evenly distributed to form a tight structure. Hence the quality varies drastically. In other words, most natural pearls, if found, rarely have qualities that worth a fortune. Now you can see why natural pearls are potentially more valuable than cultured pearls. This is because the occurrence of natural pearls is much rarer than cultured pearls. Almost all real pearls you see today are cultured. While those impressive million-dollar pearls may be out of reach, finding the sweet spots of value is actually not that difficult. When buying a piece of pearl jewellery, try using the information discussed in this guide. Remember to balance the rarity of the gems with your preferred styles and desirability. Make sure you buy from reputable or established stores and dealers who are specialised in pearls and pearl grading. If you’re in the market to get a valuation for how much your pearls are worth, always get a few quotes from expert appraisers. It is much rarer, for instance, to have a 10mm akoya pearl than a 10mm South Sea pearl. If all the other quality factors are equal, this akoya pearl would command a higher price than the South Sea pearl of the same size.

Because of their unique beauty and their inseparable bond between nature and human, pearls have held their value very well throughout centuries.Indigenous to the Caribbean Sea and a small area of the Atlantic Ocean, natural conch pearls are extremely valuable. It is estimated that one pearl is found for every 10,000 conchs collected.

However, it is not true when valuating pearls of different varieties. As shown in the image below, you can easily see the difference in pearl sizes when you compare the size of the Tahitian oyster shell against that of the akoya pearl-bearing oyster. The most valuable natural pearls that have achieved phenomenal prices, apart from their historical significance, all possess extraordinary qualities that make them beautiful. Most of the time, you’ll only find them in museums or high-end auctions. Bodycolour is the overall dominant colour of a pearl. Overtone, the secondary colour, is the translucent colour that lies on top of the bodycolour. It’s usually present over the entire pearl surface or a large part of it. Orient appears when there’s more than one translucent colour or overtone over the bodycolour. It’s visible in a much smaller area on the pearl surface and can come in a form of iridescent rainbow colours.

Pearl Types

For round pearls, the size is determined by measuring the diameter of a drilled pearl perpendicular to the drill hole. For pearls of any other shapes, the size is made up of measurements for lengths, widths or depths. Pearl sizes are usually expressed in millimetres and rounded to the nearest 0.5mm. How Pearl Lustre And Nacre Quality Affect The Value Of Pearls? When other value factors are equal, the second most valuable shape is near-round, and then followed next in value by other symmetrical shapes like oval, button, drop and baroque. How Pearl Size Impacts Its Value? Despite their huge price difference, both cultured and natural pearls are real pearls. They are grown from pearl-bearing oysters in either saltwater or freshwater. The pearl formation process is exactly the same for both natural and cultured pearls. In general, there’re 7 factors that affect the pearl value: shape, size, colour, lustre, surface quality, nacre quality and matching. Like the 4Cs of diamond valuation, the pearl’s 7 value factors are created by the Gemological Institute of America (GIA) to standardise pearl grading systems. They represent the main components of a pearl’s characteristics and beauty in a more balanced and comprehensive manner.