Igi certified hpht lab cog pob zeb diamond VS VVS Clarity
Parameters ntawm hpht lab zus 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 ntawm hpht lab cog pob zeb diamond
Xim
hpht kho pob zeb diamond xim yog graded nyob rau hauv ib tug standardized saib ib puag ncig.Gemologists soj ntsuam cov xim nyob rau hauv lub D rau Z xim ntau yam nrog lub pob zeb diamond muab tso rau pem hauv ntej, saib los ntawm sab, los pab txhawb ib tug nruab nrab saib.
Qhov tseeb
Qib clarity ntawm hpht kho pob zeb diamond raws li kev lees paub thoob ntiaj teb ntawm 10X magnification, raws li qhov pom tau, qhov loj, tus lej, qhov chaw thiab qhov xwm txheej ntawm sab hauv thiab qhov chaw 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 hauv hpht kho 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.
