There are many hemp pearls, which are very rare in the international market and expensive. True hemp pearls are mainly produced in the hemp sea area of Izu Peninsula in Japan, hence the name "hemp pearls". It is usually produced by a large shellfish in the deep sea, the clam Clam Polydentata. Its color is usually white or with pink, light yellow, gray and other tones, showing a very detailed luster and texture.
Different from other pearls, the nacre of true hemp pearls is very thick, and beads with a diameter exceeding 10 mm are also common, so the price is very expensive. Moreover, because the output is extremely rare and precious, many hemp pearls have become one of the jewelry collections that collectors are keen to chase in recent years.
Morphological characteristics of natural pearls (1);
Natural pearls are spherical, oval, irregular spherical or rectangular with a diameter of 1-6mm. The surface is white, yellowish white, light pink, light blue, etc. , with beautiful color and smoothness. Most decorated pearls have holes in the middle. It's hard and difficult to break, and the section has a layered feeling. It crackled with fire. No gas, slightly salty.
White stripes. It has typical pearl luster, soft luster and rainbow color. Transparent to translucent. There are differences due to different places of origin. No cleavage. Good toughness. White pearls are light blue to light yellow under short-wave ultraviolet irradiation; Yellow and golden pearls are yellow-green, green-brown to dark brown; Black pearls are usually pink to orange red.