Callicarpa is a kind of high-grade pearl, and its value evaluation comprehensively considers factors such as color, shape, size, surface defects, transparency and so on. The color of purple pearls is usually high in saturation and purity, accompanied by good luster. In terms of shape, high-grade pearls are relatively regular, generally round, but there are also irregular natural pearls. The price of pearls above 8 mm is also relatively high. In addition, the surface quality of pearls is also very important. Smooth surface, no flaws and cracks, high gloss, fine and rich texture will increase the value of pearls. Because of its rarity and beauty, purple pearls are usually much more expensive than ordinary seawater pearls of the same size and shape. They are the first choice for jewelry designers to make all kinds of high-grade jewelry, and their exquisiteness and artistic value are immeasurable.