1. color
Refers to the comprehensive characteristics of body color, companion color and halo color of pearls, including:
(1) Body color: the color produced by the selective absorption of white light by pearls.
(2) Companion color: one or more colors floating on the pearl surface.
(3) Halo: a floating rainbow color formed on or under the pearl epidermis.
The description of color should be based on body color, supplemented by companion color and halo color.
People are used to thinking that silver ribbon with pale pink halo is the top grade. However, special colors such as gold, purple, red and blue are more valued because they are rare. Among the black pearls, Kong Quelan Halo is used as the top grade. In fact, the love of color can be different due to personal preferences and requirements for pearl jewelry design, and there is no need to force unity. Generally speaking, people don't like Huang Zhu, as the saying goes, "people are old and yellow." However, recently, the Japanese introduced a dyed "golden bead", whose price is even higher than that of ordinary white beads, which shows the role of "spot color".
2. Size
That is, the size of a single pearl is generally based on the maximum diameter. Pearls are judged by size rather than weight, which is different from other jewels. Because there is little difference in the unit weight of pearls. So it has no practical significance. Dimensions are traditionally expressed in millimeters (mm).
create an image
The shape of a pearl refers to its appearance. Many years ago, people thought that pearls should be round. Therefore, round pearls are the most admired. In fact, some beads with special shapes are more popular because they are very rare. Such as cross-shaped beads or strange pearls. Smart designers can design it into unique jewelry. So the value is often higher.
glitter
Glossy refers to the intensity of reflected light on the pearl surface and the clarity of the image.
Step 5: Smooth surface
Smoothness refers to the smoothness and cleanliness of pearl surface determined by the size, quantity, color and location of defects.
6. Cortex thickness
Which is the thickness of the nacre. Especially some nucleated pearls, the pearl layer is very thin. Thick mother-of-pearl is the most expensive.
7. commensurate
This is the evaluation standard for jewelry made of pearls. In most cases, it refers to pearl strings. Therefore, the collocation of pearls refers to the synergy between pearls in jewelry in terms of shape, luster, smoothness, color and size. For example, whether the pearls used in a pair of pearl earrings match will naturally affect their value.
The above criteria for evaluating pearls should be comprehensively applied in principle, and one cannot be specifically emphasized.