1 classification
1, the genesis of natural and cultured pearls is divided into
(1) natural pearls and natural sea water into fresh water beads and a natural -
(2) cultured pearls and beads into a nuclear-free culture, a culture of pearl beads and shells of
2. Origin by Category
(1)-East: the world of natural beads, mining in the Persian Gulf. Duocheng white, Naibai, cream, light green.
(2)-Southeast Asia: produced in the South China Sea area, grain, color white, round-shaped, shiny-pearl, is a pearl in the Jiapin.
(3)-Japan (East-): Japan's sea water cultured pearls, colored white, round shape, size more than 2 ~ 9 cm in between.
(4)-Hepu (Nanzhu): produced in China Guangxi Hepu. This optimum quality of sea water pearls, round-shaped, shiny-keung.
(5) Tahir embankment (Black Pearl): produced in the Boliniya Islands, the Black Belt green color with color, luster excellent, with metallic luster flu
(6) pipa beads:
(7)-Taihu Lake: produced in the vicinity of Jiangsu and Zhejiang
Most are currently on the market-Taihu Lake, less expensive, small particles, the water is the basic beads, the most famous is Tahir embankment of the Black Pearl.
Second, differential
Identification of the classification of natural pearls, cultured pearls and imitation.
1, chemical composition: CaCO3 +2.5-7% organic matter, keratin, glass, plastic, 17 kinds of amino acids.
2, minerals: aragonite, 5% calcite
3, Structure: Flake aragonite overlap
4, Appearance: natural texture profile, with a round of different shapes, no wrinkles, eggshell-color, glossy mixed, with color, color, luster unity, transparency Wuban good color, inflexible
5, touch, sense of cool sand, teeth grinding a sense of sand, warm sense of mutual friction with CaCO3 powder
6, the proportion: 2.713 in heavy fluid, natural sea-80 per cent of all full-or floating, floating, the culture-90 percent
下沉.
7, the case of hydrochloric acid (5%) bubble
8, string-see, no stratification, a layered nuclear
Third, quality assessment and maintenance
From the pearl luster, color, shape, size, surface finish and a solid, modeling, and several other aspects of processing evaluation of the value of pearls
1, the genesis of natural and cultured pearls is divided into
(1) natural pearls and natural sea water into fresh water beads and a natural -
(2) cultured pearls and beads into a nuclear-free culture, a culture of pearl beads and shells of
2. Origin by Category
(1)-East: the world of natural beads, mining in the Persian Gulf. Duocheng white, Naibai, cream, light green.
(2)-Southeast Asia: produced in the South China Sea area, grain, color white, round-shaped, shiny-pearl, is a pearl in the Jiapin.
(3)-Japan (East-): Japan's sea water cultured pearls, colored white, round shape, size more than 2 ~ 9 cm in between.
(4)-Hepu (Nanzhu): produced in China Guangxi Hepu. This optimum quality of sea water pearls, round-shaped, shiny-keung.
(5) Tahir embankment (Black Pearl): produced in the Boliniya Islands, the Black Belt green color with color, luster excellent, with metallic luster flu
(6) pipa beads:
(7)-Taihu Lake: produced in the vicinity of Jiangsu and Zhejiang
Most are currently on the market-Taihu Lake, less expensive, small particles, the water is the basic beads, the most famous is Tahir embankment of the Black Pearl.
Second, differential
Identification of the classification of natural pearls, cultured pearls and imitation.
1, chemical composition: CaCO3 +2.5-7% organic matter, keratin, glass, plastic, 17 kinds of amino acids.
2, minerals: aragonite, 5% calcite
3, Structure: Flake aragonite overlap
4, Appearance: natural texture profile, with a round of different shapes, no wrinkles, eggshell-color, glossy mixed, with color, color, luster unity, transparency Wuban good color, inflexible
5, touch, sense of cool sand, teeth grinding a sense of sand, warm sense of mutual friction with CaCO3 powder
6, the proportion: 2.713 in heavy fluid, natural sea-80 per cent of all full-or floating, floating, the culture-90 percent
下沉.
7, the case of hydrochloric acid (5%) bubble
8, string-see, no stratification, a layered nuclear
Third, quality assessment and maintenance
From the pearl luster, color, shape, size, surface finish and a solid, modeling, and several other aspects of processing evaluation of the value of pearls
