Don sayan kayan ado masu kyawu, masu amfani da masu amfani da su don fahimtar lu'u-lu'u daga mahangar kwararru. Hanya don yin wannan shine gane 4C, ka'idodin kasa da kasa don kimanta lu'u-lu'u. Hudu CS nauyi ne, sahu launi, tsabta aji, kuma yanke sa.
1. Nauyin carat
Ana kirga nauyin lu'u-lu'u a cikin carats, ko kuma ana kiranta "katunan", 1 carat daidai yake da maki 100, ana iya rubuta shi azaman maki 50. Calorie ɗaya daidai yake da gram 0.2, wanda ke nufin cewa gram ɗaya daidai yake da adadin kuzari 5. Babban lu'u-lu'u, da rarer dole ne. Don masu siye na lu'u-lu'u na farko, yi ƙoƙarin farawa ta hanyar zabar girman lu'u-lu'u. Koyaya, kowane lu'ulu'u biyu na nauyin carat guda na iya bambanta cikin mahimmanci saboda launuka daban-daban, don haka akwai wasu fage da kuma yanke yayin sayen lu'u-lu'u.
2. Matsakaicin launi
More gama gari a kasuwa shine jerin cape sune lu'u-lu'u lu'u-lu'u, wanda za'a iya rarrabe shi azaman "m mai launi" da "kusan launin rawaya". Matsayi mai launi an ƙaddara bisa ga GB / T 165554-2017 "Matsayi na lu'u-lu'u, farawa daga" D "launi zuwa" z ". Launi ne D, e, F, wanda aka sani da launuka marasa launi, yana da matukar wuya, bambanci tsakanin su don dogaro kan masana sosai don gano. A mafi launi launi ne G zuwa L, wanda kuma aka sani da kusan launuka mara launi. Masana za su kasance mafi sauƙin rarrabe, amma matsakaicin mutumin yana da wahalar rarrabe, idan an saita shi a cikin kayan adon kayan ado shine mafi wuya ga ganowa. Launin yana ƙasa da m, wanda kuma aka sani da haske rawaya rawaya, matsakaicin mutum na iya iya rarrabe, amma farashin ya kasance mai rahusa. A zahiri, lu'u-lu'u suna da wasu launuka, da ake kira lu'u-lu'u masu launi, yana iya zama rawaya, ruwan hoda, shuɗi, baƙi, ƙaledoscope, amma mai matukar daraja, babban darajar.
3. Bayanin
Kowane lu'u-lu'u na musamman ne kuma yana dauke da alamar rashin hankali, kamar alamar haihuwa na halitta, da lamba, girma, sifa da launi na waɗannan m wajen ƙayyade tsabta ta Diamond da bambanci. A zahiri, mafi yawan ƙirar lu'u-lu'u ba su iya gani da ido ga tsirara. Kadan da ya ci a lu'u-lu'u a cikin lu'u-lu'u, da mafi haske ana goge, da lu'u-lu'u ne mai haske. A cewar "Standard" Diamond Gring "Dandalin kasar Sin, cikar ganewa ya kamata a gudanar da shi a ƙarƙashin sau 10 girma, da kuma darajarta sune kamar haka:
LC ba ta da lahani
Kadan kadan fasali na vvs (masana suka zama dole su duba sosai don nemo su)
Vs kadan na ciki da waje (da wuya ga masana za su samu)
Sigsi na ciki da na waje (mafi sauki ga masana don neman)
P yana da halaye na ciki da waje (bayyane ga tsirara ido)
Diamonds sama vvs ne rare. Abubuwan da ke ciki na vs ko si suma suna ganuwa ga ido tsirara, amma farashin ya fi arha, kuma mutane da yawa suna siya. Amma ga P-Class, farashin ba shakka ƙarancin ƙasa, kuma idan yana da haske sosai kuma yana da haske sosai, ana iya siye shi.
Hudu, yanke
Yankan yana wakiltar abubuwa da yawa, ban da tsari, gami da kwana, gwargwado, murabba'i, niƙa da sauransu. Lokacin da yawan yankakken lu'u-lu'u ya dace, haske kamar yadda madubi yake tunani, bayan da aka gyara fuskokin fuskoki daban-daban, mai ɗaure a saman lu'u-lu'u, wanda ya haifar da haske mai haske. A sare lu'ulu mai zurfi ne ko kuma m zai haifar da hasken da zai gudana daga ƙasa kuma ya rasa luster. Saboda haka, daskararren lu'u-lu'u da sauƙi suna da babbar darajar.
Lokaci: Sat-22-2023