EX-VG hpht da aka yi wa lu'u-lu'u babban matsi mai tsananin zafi lu'u-lu'u
Ma'aunin lu'u-lu'u na babban matsa lamba high zafin jiki
| Code # | Daraja | Nauyin Carat | Tsaratarwa | Girman |
| 04A | A | 0.2-0.4ct | Farashin VVS | 3.0-4.0mm |
| 06 A | A | 0.4-0.6ct | Farashin VVS | 4.0-4.5mm |
| 08A | A | 0.6-0.8ct | VVS-SI1 | 4.0-5.0mm |
| 08B | B | 0.6-0.8ct | SI1-SI2 | 4.0-5.0mm |
| 08C | C | 0.6-0.8ct | SI2-I1 | 4.0-5.0mm |
| 08D | D | 0.6-0.8ct | I1-I3 | 4.0-5.0mm |
| 10 A | A | 0.8-1.0ct | VVS-SI1 | 4.5-5.5 mm |
| 10B | B | 0.8-1.0ct | SI1-SI2 | 4.5-5.5 mm |
| 10C | C | 0.8-1.0ct | SI2-I1 | 4.5-5.5 mm |
| 10D | D | 0.8-1.0ct | I1-I3 | 4.5-5.5 mm |
| 15 A | A | 1.0-1.5ct | VVS-SI1 | 5.0-6.0mm |
| 15B | B | 1.0-1.5ct | SI1-SI2 | 5.0-6.0mm |
| 15C | C | 1.0-1.5ct | SI2-I1 | 5.0-6.0mm |
| 15D | D | 1.0-1.5ct | I1-I3 | 5.0-6.0mm |
| 20 A | A | 1.5-2.0ct | VVS-SI1 | 5.5-6.5mm |
| 20B | B | 1.5-2.0ct | SI1-SI2 | 5.5-6.5mm |
| 20C | C | 1.5-2.0ct | SI2-I1 | 5.5-6.5mm |
| 20D | D | 1.5-2.0ct | I1-I3 | 5.5-6.5mm |
| 25 A | A | 2.0-2.5ct | VVS-SI1 | 6.5-7.5 mm |
| 25B | B | 2.0-2.5ct | SI1-SI2 | 6.5-7.5 mm |
| 25C | C | 2.0-2.5ct | SI2-I1 | 6.5-7.5 mm |
| 25D | D | 2.0-2.5ct | I1-I3 | 6.5-7.5 mm |
| 30A | A | 2.5-3.0ct | VVS-SI1 | 7.0-8.0mm |
| 30B | B | 2.5-3.0ct | SI1-SI2 | 7.0-8.0mm |
| 30C | C | 2.5-3.0ct | SI2-I1 | 7.0-8.0mm |
| 30D | D | 2.5-3.0ct | I1-I3 | 7.0-8.0mm |
| 35A | A | 3.0-3.5ct | VVS-SI1 | 7.0-8.5mm |
| 35B | B | 3.0-3.5ct | SI1-SI2 | 7.0-8.5mm |
| 35C | C | 3.0-3.5ct | SI2-I1 | 7.0-8.5mm |
| 35D | D | 3.0-3.5ct | I1-I3 | 7.0-8.5mm |
| 40A | A | 3.5-4.0ct | VVS-SI1 | 8.5-9.0mm |
| 40B | B | 3.5-4.0ct | SI1-SI2 | 8.5-9.0mm |
| 40C | C | 3.5-4.0ct | SI2-I1 | 8.5-9.0mm |
| 40D | D | 3.5-4.0ct | I1-I3 | 8.5-9.0mm |
| 50A | A | 4.0-5.0ct | VVS-SI1 | 7.5-9.5mm |
| 50B | B | 4.0-5.0ct | SI1-SI2 | 7.5-9.5mm |
| 60A | A | 5.0-6.0ct | VVS-SI1 | 8.5-10 mm |
| 60B | B | 5.0-6.0ct | SI1-SI2 | 8.5-10 mm |
| 70A | A | 6.0-7.0ct | VVS-SI1 | 9.0-10.5mm |
| 70B | B | 6.0-7.0ct | SI1-SI2 | 9.0-10.5mm |
| 80A | A | 7.0-8.0ct | VVS-SI1 | 9.0-11 mm |
| 80B | B | 7.0-8.0ct | SI1-SI2 | 9.0-11 mm |
| 80+A | A | 8.0ct + | VVS-SI1 | 9mm+ ku |
| 80+B | B | 8.0ct + | SI1-SI2 | 9mm+ ku |
4C Standard na babban matsa lamba high zafin jiki lu'u-lu'u
Launi
Babban matsa lamba babban zafin jiki launi lu'u-lu'u an ƙididdige shi a cikin daidaitaccen yanayin kallo. Masu binciken ilimin gemologists suna nazarin launi a cikin launi na D zuwa Z tare da lu'u-lu'u da aka sanya a sama, kallo ta gefe, don sauƙaƙe ra'ayi na tsaka tsaki.
Tsaratarwa
Tsabtace ma'auni na babban matsin lu'u-lu'u zafin zafin jiki bisa ga ƙa'idodin da aka yarda da su a duniya a haɓaka 10X, bisa ga ganuwa, girman, lamba, wuri da yanayin halaye na ciki da na sama a wannan haɓakawa.
Yanke
Gemologists gabaɗayan ma'auni, ma'auni da kusurwoyi na facet an kwatanta su tare da nazarin haske, wuta, scintillation da tsari don tantance Yanke Grade na hpht da aka yi wa lu'u-lu'u.
Nauyin Carat
Matakin farko a cikin babban matsi mai tsananin zafin zafin ƙimar lu'u-lu'u yana auna lu'u-lu'u.Nauyin Carat shine ma'aunin nauyi na daidaitattun duwatsu masu daraja.Ƙididdigar lu'u-lu'u zuwa wurare guda biyu ne don tabbatar da daidaito.
