Pearls are formed in the seawater or in the shellfish in fresh water. The main component of pearls is calcium carbonate, which is widely used. It is a great use for making necklaces, bracelets, earrings and other accessories.
There are many types of pearls, which can be divided into white, cyan, light pink, black and other colors according to the color. It is better to use white pearls, light powder and black are rare and precious; according to the shape, it can be divided into round, ellipse, oblate, twin, and taro, among which fine round pearls are beautiful and rare; Beads (heavier than three points), PCT beads (heavier than one centimeter), beads (heavier than one millimeter), buckle beads (weight less than one millimeter).
Just look at the weight of the pearl, the heavier the weight, the higher the value; according to the cultured waters of the pearl, it can be divided into seawater pearls and freshwater pearls, among which the seawater pearls are unique and of high quality. In addition, pearls are also divided into natural pearls and artificial pearls. Natural pearls are purely natural. Artificial cultured pearls are made of pre-rounded shells or cut soft tissue of shells into small pieces and implanted into fixed aquaculture waters. As a stimulant, after a long period of time, the implanted foreign bodies are gradually replaced by shells. Multiple secretions are coated to form the pearl. Its characteristics are that the pearl formation time is shorter, the shape is more round, the particles are larger, but the center has a nucleus, the epidermis is easy to fall off, and the pearl light disappears. The true pearl has a hard texture, and the skin is delicate and sparkling, sparkling with beautiful pearls.
Pearls are natural fruits, their shapes are naturally different, they are less round, and there are many fine sand eyes, wrinkles or grooves on the skin. When worn, the skin feels cold. Some of the fake pearls are plastic beads, and some are glass beads coated with fish scale powder. The plastic bead gloss thief is unnatural, the texture is soft, the shape is standard, the size is the same, the surface is smooth and there is no natural defect, and the skin has no cold feeling when worn. The glass beads are more like pearls, the surface is extremely smooth, no blisters, wrinkles, uniform shape, white color is not moist, bright and not soft. If it is with a hole, observe from the hole, the glass beads are white and dark, and the inside and outside of the pearl are the same.
Pearl evaluation
As a pearl for gems, it can generally be evaluated and deleted from four aspects:
1. Gloss, accounting for 40% of the price;
2, shape, accounting for 30% of the price;
3, size, accounting for 20% of the price;
4, color, accounting for 10% of the price;
(1) Pearl luster occupies a very important position in the evaluation of pearls, which is the key to determining the quality of pearls.
The pearl can be roughly divided into three types according to the intensity of the gloss.
1. Strong gloss: Appears in the first-grade pearl. The surface of the bead is crystal clear and moist, and the iridescent color is clear, which can see the object.
2, medium gloss: appears in the secondary pearl, the surface of the bead is basically clear, can see or partially sight the object.
3, weak gloss: appear in the third-grade pearl, the surface of the bead is pearl luster or weak pearl.
(2) The shape of the roots is different, and the pearls can be divided into the following four categories:
1, Zheng Yuanzhu: also known as walking beads, rolling beads, fine beads. The difference in length and length is less than 1%.
2, round beads: length difference is less than 1-10%
3, oval beads: the length difference between the length and length is less than 10-20%
4, deformed beads: called shaped beads, the length difference between the length and length is greater than 20%. The deformed beads include skull beads, pendant beads, twin beads, mother beads, horse teeth beads, oval beads, and art beads.
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