Pearl's English name is Pearl, which evolved from Latin Pernulo. Its other name is Margaret, which comes from ancient Persian Sanskrit, meaning "son of the sea".
Pearl-undisturbed
As early as ancient times, when primitive humans were foraging by the sea, they found white pearls with colorful auras and were attracted by their crystal splendor. Since then, pearls have become people's favorite ornaments and have been passed down to this day.
China's natural freshwater pearls are mainly produced in Hainan Island. There are five kinds of pearls: white, red, yellow, black and variegated, and most of them are opaque. [2]
Authoritative classification of "Gem Queen" pearls
Jewellery v classroom
Like 12
Reading 3 102
Other names
Zhu Zhen, Zhu Zhen, mussel pearl, pearl, lotus pearl.
chemical composition
The inorganic components of pearls are mainly calcium carbonate and magnesium carbonate, accounting for more than 9 1%, followed by silica, calcium phosphate, Al2O3 and Fe2O3.
The organic matter in pearls contains 17 kinds of amino acids, such as aspartic acid, threonine, serine, glutamic acid, glycine, alanine, cystine, valine, methionine, isoleucine, leucine, tyrosine, phenylalanine, histidine, arginine and proline. In addition, it also contains more than 30 kinds of trace elements, taurine, rich vitamins and peptides.
The unique charm aura of Nanyang Jinzhu
Jewellery v classroom
Zan 8
Reading 2068
Appearance characteristics
Pearl has various shapes, such as round, pear-shaped, egg-shaped, teardrop-shaped, button-shaped, arbitrary shape, etc., among which round is the best. Not an isotropic body. Colors are white, pink, light yellow, light green, light blue, brown, lavender, black and so on. , mainly white. White stripes. It has typical pearl luster, soft luster and rainbow color. Transparent to translucent. Refractive index 1.530- 1.686, birefringence: aggregate is unmeasurable. There is no dispersion. The hardness is 2.5-4.5. The density of natural freshwater pearls is generally 2.66-2.78g/cm3, which varies from place to place. 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; There is yellow-white fluorescence under X-ray. Foam in hydrochloric acid.