Per them cultivated
Per it, by the nature of its growth and development, never will be round, neither great nor perfect. It is why million to the year in different countries are cultivated. Single 50% of ostras nucleadas will survive to produce to per them and single 20% will be to per them commercial.
The origin of per them of culture is of end of century XIX, being two types different from culture:
- Culture of Biological Nucleation, is made by natural means where the beginning of the generation of per it through implanting small organic bodies is caused or per them. This is deposited inside the Ostra and causes the beginning of the nacre sedimentation on her, is as well as it forms the Per it.
This technique of culture is used with Ostras that generates Per them Australian, Per them Freshwater, Per them Chinese and Black Per them Tahitianas. The result is to per them great with different forms and a high thickness in nacre.
The culture process can take between three and eight years.
- Culture of Synthetic Nucleation, consists of inserting a synthetic nucleus of between 5 to 10 mm. with the purpose of obtaining to per them round. The period of culture by this method can take between one and three years.
This technique is used exclusively in Japan and they are obtained to per them round, with low thickness in nacre and of an inferior size to 10mm.
Different Cultivated types of Per them
• Per it Cultivated Freshwater.
This type of per cultivated it extends by Japan, the United States and China. Years ago single they were possible to be able to per them small with irregular forms. From years 90 it increased its quality and nowadays they characterize by its high nacre level and the diversity of its forms, sizes and colors.
• Japanese Cultivated Per it.
It is cultivated in Japan and it comes from the Ostra Akoya. It is cultivated with the technique of synthetic nucleation, reason why its growth is more difficult. These per them of Japanese culture they are almost perfectly round and of different tones, between the rose, the target and the cream.
• Chinese Cultivated Per it
They also come from the Ostra Akoya and during the last decade they are developed in Chinese farms. These per cultivated them they are not of so good quality as the Japanese.
• Per it of the Sea of the South (Australian)
It is a type of per it exceptional. They are cultivated in salt waters and they come from the Ostra Pinctada Maxima. The time of culture can take between 3 to 8 years. Australian per them they can reach sizes between 9 and 27.9 mm. and they have a golden and silver-plated iridiscencia.
• Per it Negra Tahitiana
These per them they are cultivated in its majority in salt waters of French Polynesia and they are not always black, can be green, gray, oranges, golden, etc. They are cultivated by the Ostra Pinctada Margaritifera and its time of culture can be of between 2 and 3 years. Its size is between 8 to 18mm.
• Per them Mabé
They grow beaten inside the Ostra and they are to per them hemisféricas.
They are easy to obtain and its price is relatively lower than any other type of per cultivated it, although if high and good size are obtained to quality pieces of, they can reach higher prices.
The Care of the Per them Cultivated
So that per them they are conserved brilliants by many years it is necessary to take some well-taken care of precautions and.
- There are products that contain chemistries, as the perfume, the lacquer and the cosmetics, that can damage the brightness of per it. If it is going to use some of these products, is placed per them when it has finished using them.
- It cleans per them with a smooth cloth from time to time, thus will eliminate rest of harmful products.
- It keeps per them in a fabric bag, separated of other jewels to avoid that they are rallen.
Factors that determine the Quality of the Cultivated Per it
- The brightness, the more brightness the more value.
- The thickness of nacre. It is the external layer of per it. The more normally great she is to per it, the more nacre layers has. If nacre is thin it can chip easily.
- The texture of the surface. The superficial imperfections reduce the value of per it.
- The color. The color of the body is called to him. Per them they can be of different colors and also they can be dyed with one second layer. It is necessary to avoid a color or a secondary shade.
- The form. In per it, the form can vary enough. Most expensive they are round the perfect ones.
- The size. The more great per it, the more expensive it will be. Those that is round they measure in millimeters according to its diameter and barrocas they are measured by its wide length and.
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