EducationSouth Sea Pearls
Kinds of Pearls: Natural pearls are pearls that formed without human’s help, while cultured pearl are kind of pearls that require human’s intervention and care. There are four major types of cultured pearls: Akoya Cultured Pearls, South Sea Cultured Pearls, Tahitian Cultured Pearls, and Fresh Water Cultured Pearl.
South Sea Pearls
Most of pearl which used in Lombok NTB Pearls’ products are South Sea Pearl. South Sea Pearl is believed as the queen of pearl. This kind of pearl is produced by Pinctada Maxima as well as Pteria Penguin. It is usually found in Northern Australia, and South East Asia including Myanmar and Indonesia. .South Sea Pearl are large and luminous white and golden pearls. The size ranging from 8.0 – 9.0 up through 20.0 mm. the average size ranging from 9.0mm to 15.0mm, over 15.0mm consider to be the rarest and most expensive one. The color of South Sea Pearl is ranging from Gold to white.
Standards of Value: the is no international standard or uniform grading system to determine the value of pearls. Unlike other precious gems, pearls demonstrate unique characteristics that result in a huge variation in their appearance. Nevertheless, there are five characteristic based on which pearls are graded. Overall, they are valued based on these categories
the shape of pearls is the e first characteristic on which it is graded during the sorting process after harvesting. There are common term used to define the share o pearls, such as:
- Near round
- Semi baroque
The principle of measurement of pearl is the diameter of its round part, which determined using special gauge. For any shape of other than round or near round, it is also common to measure both vertical and horizontal length. Measurement are stated in millimeter and in the Japanese standard length, bu ( 1 bu = 3,1mm).
The measurement of pearl can also be measured by weight, either in grams or the Japanese standard weight, momme ( 1 momme= 3,75 g). however, the weight of a pearl is generally considered less important since it can be affected by the weight of nucleus, which has little bearing on the quality of pearl.
Size palys an important role in determining the value of pearls, if the size is increase the rate also rising- in particular, 18mm and over can command an extremely high price.
Shiny pearls with bright, iridescent luster are what every pearl cultivator aims to produce. The luster is determined by the quality of the host oyster’ nacreous substance, how thick or even the layers of nacre are. Slow growing host oyster can cause crystal formation in the prismatic layer to be inconsistent of pearls, yielding pearls with dull appearance. Poor quality of nacre are may result if the mantel piece used to taken from poor quality of donor
is perhaps the most subjective of all the characteristics by which pearl are graded. Although color preference is ultimately a matter of individual taste, trends, and fashions do emerge for certain colors on an international scale.
The demand for particular color fluctuates with this trend. For example, for many years, there was a little demand for gold pearl, the dominant preferences of European consumer for white hues. However, recently, emerging demand for gold pearl from Asia, China in particular, has driven their price up, with intense gold pearls with red overtone commanding especially high price.
The surface quality of pearl depends on two main factors- the appearance of dimples on the surface and uniformity and smoothness of the surface layers of nacre. Every cultured of natural pearl will have at least one dimple on its surface. A smooth surface with only a single dimple is therefore considered the highest quality surface. a smooth surface with only single dimple is therefore considered the highest quality surface. Addition dimples reduce the desirability of pearl.
Surface smoothness is very important in determining the value of a pearl. Those with an even and uniform surface are considered the highest quality. Surface smoothness is affected by the rate of pearl growth during the production stage. Often, a fast growing pearl will have something called “hammering” surface, which looks as if a sheet of nacre has been hammered, causing the pearl’s value to decrease.
pearl is the only one gemstone that produced by living creature. It is the reason why pearl quite vulnerable to alkaline, acid, and high humidity. In order to keep the pearl’s luster, avoid contact with perfume, hair spray, cosmetics, and other kind of chemicals material. In addition, always put on your jewelry as a final touch after doing hair styling or make up. After using, gently wipe your pearl jewelry with a soft cloth before put it back to jewelry box.
Other Materials: woods, some kind of stone, synthetic leather, and cloths.