EX-VG hpht kho pob zeb diamond kub siab kub pob zeb diamond
Parameters ntawm kev kub siab kub kub pob zeb diamond
| Code # | Qib | Carat Nyhav | Qhov tseeb | Loj |
| 04 A | A | 0.2-0.4 hli | VVVVVV VS | 3.0-4.0 hli |
| 06a ib | A | 0.4-0.6 hli | VVVVVV VS | 4.0-4.5 hli |
| 08 A | A | 0.6-0.8 hli | VVS-SI 1 | 4.0-5.0 hli |
| 08b ua | B | 0.6-0.8 hli | SI1-SI2 | 4.0-5.0 hli |
| 08c ua | C | 0.6-0.8 hli | SI2-I1 | 4.0-5.0 hli |
| 08d ib | D | 0.6-0.8 hli | I1-I3 | 4.0-5.0 hli |
| 10 A | A | 0.8-1.0 hli | VVS-SI 1 | 4.5-5.5 hli |
| 10B | B | 0.8-1.0 hli | SI1-SI2 | 4.5-5.5 hli |
| 10 C | C | 0.8-1.0 hli | SI2-I1 | 4.5-5.5 hli |
| 10D | D | 0.8-1.0 hli | I1-I3 | 4.5-5.5 hli |
| 15 A | A | 1.0-1.5 ct | VVS-SI 1 | 5.0-6.0 hli |
| 15B | B | 1.0-1.5 ct | SI1-SI2 | 5.0-6.0 hli |
| 15 C | C | 1.0-1.5 ct | SI2-I1 | 5.0-6.0 hli |
| 15D | D | 1.0-1.5 ct | I1-I3 | 5.0-6.0 hli |
| 20 A | A | 1.5-2.0 hli | VVS-SI 1 | 5.5-6.5 hli |
| 20B | B | 1.5-2.0 hli | SI1-SI2 | 5.5-6.5 hli |
| 20 C | C | 1.5-2.0 hli | SI2-I1 | 5.5-6.5 hli |
| 20D | D | 1.5-2.0 hli | I1-I3 | 5.5-6.5 hli |
| 25 A | A | 2.0-2.5 ct | VVS-SI 1 | 6.5-7.5 hli |
| 25B | B | 2.0-2.5 ct | SI1-SI2 | 6.5-7.5 hli |
| 25C ua | C | 2.0-2.5 ct | SI2-I1 | 6.5-7.5 hli |
| 25D ib | D | 2.0-2.5 ct | I1-I3 | 6.5-7.5 hli |
| 30 A | A | 2.5-3.0 hli | VVS-SI 1 | 7.0-8.0 hli |
| 30B | B | 2.5-3.0 hli | SI1-SI2 | 7.0-8.0 hli |
| 30 C | C | 2.5-3.0 hli | SI2-I1 | 7.0-8.0 hli |
| 30D | D | 2.5-3.0 hli | I1-I3 | 7.0-8.0 hli |
| 35 A | A | 3.0-3.5 hli | VVS-SI 1 | 7.0-8.5 hli |
| 35B | B | 3.0-3.5 hli | SI1-SI2 | 7.0-8.5 hli |
| 35C ua | C | 3.0-3.5 hli | SI2-I1 | 7.0-8.5 hli |
| 35D ib | D | 3.0-3.5 hli | I1-I3 | 7.0-8.5 hli |
| 40 A | A | 3.5-4.0 hli | VVS-SI 1 | 8.5-9.0 hli |
| 40B | B | 3.5-4.0 hli | SI1-SI2 | 8.5-9.0 hli |
| 40C ua | C | 3.5-4.0 hli | SI2-I1 | 8.5-9.0 hli |
| 40D ib | D | 3.5-4.0 hli | I1-I3 | 8.5-9.0 hli |
| 50 A | A | 4.0-5.0 ct | VVS-SI 1 | 7.5-9.5 hli |
| 50B | B | 4.0-5.0 ct | SI1-SI2 | 7.5-9.5 hli |
| 60 A | A | 5.0-6.0 hli | VVS-SI 1 | 8.5-10 hli |
| 60B | B | 5.0-6.0 hli | SI1-SI2 | 8.5-10 hli |
| 70 A | A | 6.0-7.0 hli | VVS-SI 1 | 9.0-10.5 hli |
| 70 B ib | B | 6.0-7.0 hli | SI1-SI2 | 9.0-10.5 hli |
| 80 A | A | 7.0-8.0 hli | VVS-SI 1 | 9.0-11 hli |
| 80B | B | 7.0-8.0 hli | SI1-SI2 | 9.0-11 hli |
| 80 + A | A | 8.0ct + | VVS-SI 1 | 9mm + |
| 80+B | B | 8.0ct + | SI1-SI2 | 9mm + |
4C Txuj kev kub siab kub kub pob zeb diamond
Xim
Kev kub siab kub kub pob zeb diamond xim yog graded nyob rau hauv ib tug standardized saib ib puag ncig.Gemologists tsom xam cov xim nyob rau hauv lub D rau Z xim ntau yam nrog lub pob zeb diamond muab tso rau upside down, saib los ntawm sab, los pab txhawb ib tug nruab nrab saib.
Qhov tseeb
Qib clarity ntawm kev kub siab kub kub pob zeb diamond raws li kev lees paub thoob ntiaj teb ntawm 10X magnification, raws li qhov pom, qhov loj, tus naj npawb, qhov chaw thiab qhov xwm txheej ntawm sab hauv thiab saum npoo ntawm qhov kev nthuav dav.
Txiav
Gemologists tag nrho cov proportions, kev ntsuas thiab facet ces kaum yog muab piv nrog rau cov kev tshawb fawb ntawm brightness, hluav taws kub, scintillation thiab qauv los txiav txim qhov txiav Qib ntawm lub hpht kho pob zeb diamond.
Carat hnyav
Thawj theem ntawm kev kub siab kub kub pob zeb diamond grading yog hnyav lub pob zeb diamond.Carat hnyav yog tus qauv hnyav ntsuas rau gemstones.Kev muab qhab nia ntawm pob zeb diamond yog rau ob qhov chaw lej kom ntseeg tau qhov tseeb.
