The pearl begins when the mollusk secretes a lustrous substance , called nacre , that coats the irritant and protects the soft internal surface of the mollusk 得天獨(dú)厚的自然條件,配合來自珍珠養(yǎng)殖業(yè)的翹楚日本的高超技術(shù),是澳洲南洋珍珠高品質(zhì)的保證。
5 a round to near - round ; moderate / low luster ; thin nacre ( less than . 2 of total nacre ) ; 60 - 70 % inclusion free surface ; good to moderate matching 5 a圓到接近圓的程度,中/低的光澤,簿的珠層(小于0 . 2的珠層含量) , 60 % - 70 %的表皮光潔度,良好到中等的匹配。
A tiny bead is implanted in an oyster , so that it is gradually coated in layers of a beautiful , pearlescent substance called nacre which build up to create a lustrous pearl 尤其是在近兩年的日本及歐美,珍珠飾品含蓄內(nèi)斂的氣質(zhì)吸引了不少知性女子,成為時尚飾品的一大主流。
7 commercial quality near - round to off - round ; moderate / low luster ; thin nacre ( less than . 2 of total nacre ) ; moderate to heavy inclusions ; good to moderate matching 7經(jīng)濟(jì)級的質(zhì)量,接近圓到不圓,中/低光澤,簿的珠層(小于0 . 2的珠層含量) ,中等到大量的瑕疵,良好到中等的匹配。
As an oyster creates a pearl , the layers of nacre do not always adhere smoothly . sometimes spots and bubbles can appear in the layering process 由于光的反射,使珍珠看起來明亮有光澤由于光線的透射,使珍珠看起來晶瑩剔透由于折射,光線會生產(chǎn)干涉現(xiàn)象,從而產(chǎn)生了變幻不定的色彩。
2 aa + perfect round ; excellent luster ; thick nacre ( . 5 of total nacre or better ) ; 90 - 95 % inclusion free surface ; excellent matching ; top 5 % of a pearl farm ' s harvest 圓度極高,極好的光澤,厚的珠層( 0 . 5或以上的珠層含量) , 90 - 95 %的表皮光潔度,極好的匹配,珠農(nóng)收成中最好的5 %部份。
1 aaa perfect round ; excellent luster ; thick nacre ( . 7 of total nacre or better ) ; 95 % inclusion free surface or better ; excellent matching ; top 1 % of a pearl farm ' s harvest 1 aaa圓度極高,極好的光澤,厚的珠層( 0 . 7或以上的珠層含量) , 95 %的表皮光潔度或更高,極好的匹配,珠農(nóng)收成中最好的1 %部份。
The quality of pearls is judged by the orient , which is the soft iridescence caused by the refraction of light by the layers of nacre , and lustre , the reflectivity and shine of the surface 珍珠的價值主要由它的光澤顏色大小有無表面的缺陷和形狀來決定的,其中光澤為最重要的因素。其特有的光澤是光
2 ) the carotenoids successfully probed in nacre by in situ resonance raman spectra , are considered one of the most important factors responsible for the coloration of nacre and pearl 2 )采用共振拉曼光譜首次成功地原位探測到三角帆蚌及馬氏珍珠貝珍珠層中類胡蘿卜素的存在,并提出類胡蘿卜素是珍珠層致色的重要原因之一。
3 aa very round ( less than 5 % gradation ) ; good luster , good nacre ( . 35 of total nacre or better ) ; 80 - 90 % inclusion free surface ; good / excellent matching ; top 20 % of a pearl farm ' s harvest 3 aa非常圓(少于5 %的那部份的等級) ,良好的光澤,良好的珠層( 0 . 35或以上的珠層含量) , 80 % - 90 %的表皮光潔度,好/極好的匹配,珠農(nóng)收成中最好的20 %部份。