Characteristics of cultured pearls

Pearls are found in the ocean, and they are bred by the mother-of-pearl. With the constant love of pearls, the demand for pearls is also increasing. Because of the continuous development of science and technology, many pearls seen in the market are now artificially cultivated. In the end, the characteristics of cultured pearls, such pearls Is it valuable? The following is a detailed introduction.

Cultured pearls are artificially cultivated pearls. Although their value is lower than that of seawater pearls, cultured pearls are still popular with most people and quickly occupy the pearl market. Cultured pearls come in a variety of colors, from colorless to pale yellow, as well as green, purple, blue and pink. The cultured pearls still emit pearl luster.

The transparency of cultured pearls is translucent to opaque. Its refractive index is between 1.500 and 1.685, but most of it is between 1.53-1.56. The radiance of cultured pearls is not strong, and it emits a brilliance of pink, yellow, green and light blue. The absorption spectrum of cultured pearls is characterized by no features, and the cleavage belongs to the aggregates. Its hardness is 2.5-4. Cultured pearls have a lower density than natural pearls.

If the cultured pearl is observed with an internal microscope, it will be found to have a nuclear layered structure. The nacreous layer of the cultured pearl has a concentric radial structure, and its surface has a fine layered pattern. The bead core of the cultured pearl presents parallel layers in the bead. The reflection at the core is white and cold. Cultured pearls will blister if exposed to acid, and will turn brown if exposed to high temperatures, and cultured pearls will have a sandy feel if rubbed against the surface.

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