I-EX-VG hpht iphathwe ngamadayimane anengcindezi ephezulu yokushisa kwedayimane
Amapharamitha okushisa okuphezulu kwedayimane
| Ikhodi # | Ibanga | Isisindo se-Carat | Ukucaca | Usayizi |
| 04A | A | 0.2-0.4ct | I-VVS VS | 3.0-4.0mm |
| 06A | A | 0.4-0.6ct | I-VVS VS | 4.0-4.5mm |
| 08A | A | 0.6-0.8ct | I-VVS-SI1 | 4.0-5.0mm |
| 08B | B | 0.6-0.8ct | SI1-SI2 | 4.0-5.0mm |
| 08C | C | 0.6-0.8ct | I-SI2-I1 | 4.0-5.0mm |
| 08D | D | 0.6-0.8ct | I1-I3 | 4.0-5.0mm |
| 10A | A | 0.8-1.0ct | I-VVS-SI1 | 4.5-5.5mm |
| 10B | B | 0.8-1.0ct | SI1-SI2 | 4.5-5.5mm |
| 10C | C | 0.8-1.0ct | I-SI2-I1 | 4.5-5.5mm |
| 10D | D | 0.8-1.0ct | I1-I3 | 4.5-5.5mm |
| 15A | A | 1.0-1.5ct | I-VVS-SI1 | 5.0-6.0mm |
| 15B | B | 1.0-1.5ct | SI1-SI2 | 5.0-6.0mm |
| 15C | C | 1.0-1.5ct | I-SI2-I1 | 5.0-6.0mm |
| 15D | D | 1.0-1.5ct | I1-I3 | 5.0-6.0mm |
| 20A | A | 1.5-2.0ct | I-VVS-SI1 | 5.5-6.5mm |
| 20B | B | 1.5-2.0ct | SI1-SI2 | 5.5-6.5mm |
| 20C | C | 1.5-2.0ct | I-SI2-I1 | 5.5-6.5mm |
| 20D | D | 1.5-2.0ct | I1-I3 | 5.5-6.5mm |
| 25A | A | 2.0-2.5ct | I-VVS-SI1 | 6.5-7.5mm |
| 25B | B | 2.0-2.5ct | SI1-SI2 | 6.5-7.5mm |
| 25C | C | 2.0-2.5ct | I-SI2-I1 | 6.5-7.5mm |
| 25D | D | 2.0-2.5ct | I1-I3 | 6.5-7.5mm |
| 30A | A | 2.5-3.0ct | I-VVS-SI1 | 7.0-8.0mm |
| 30B | B | 2.5-3.0ct | SI1-SI2 | 7.0-8.0mm |
| 30C | C | 2.5-3.0ct | I-SI2-I1 | 7.0-8.0mm |
| 30D | D | 2.5-3.0ct | I1-I3 | 7.0-8.0mm |
| 35A | A | 3.0-3.5ct | I-VVS-SI1 | 7.0-8.5mm |
| 35B | B | 3.0-3.5ct | SI1-SI2 | 7.0-8.5mm |
| 35C | C | 3.0-3.5ct | I-SI2-I1 | 7.0-8.5mm |
| 35D | D | 3.0-3.5ct | I1-I3 | 7.0-8.5mm |
| 40A | A | 3.5-4.0ct | I-VVS-SI1 | 8.5-9.0mm |
| 40B | B | 3.5-4.0ct | SI1-SI2 | 8.5-9.0mm |
| 40C | C | 3.5-4.0ct | I-SI2-I1 | 8.5-9.0mm |
| 40D | D | 3.5-4.0ct | I1-I3 | 8.5-9.0mm |
| 50A | A | 4.0-5.0ct | I-VVS-SI1 | 7.5-9.5mm |
| 50B | B | 4.0-5.0ct | SI1-SI2 | 7.5-9.5mm |
| 60A | A | 5.0-6.0ct | I-VVS-SI1 | 8.5-10mm |
| 60B | B | 5.0-6.0ct | SI1-SI2 | 8.5-10mm |
| 70A | A | 6.0-7.0ct | I-VVS-SI1 | 9.0-10.5mm |
| 70B | B | 6.0-7.0ct | SI1-SI2 | 9.0-10.5mm |
| 80A | A | 7.0-8.0ct | I-VVS-SI1 | 9.0-11mm |
| 80B | B | 7.0-8.0ct | SI1-SI2 | 9.0-11mm |
| 80+A | A | 8.0ct + | I-VVS-SI1 | 9mm+ |
| 80+B | B | 8.0ct + | SI1-SI2 | 9mm+ |
I-4C Izinga ledayimane elinomfutho ophezulu wokushisa okuphezulu
Umbala
Umbala wedayimane onengcindezi ephezulu yokushisa okuphezulu ulinganiswa endaweni yokubuka esezingeni.Ongoti beGemology bahlaziya umbala ebangeni lombala lika-D ukuya ku-Z ngedayimane elibekwe libheke phansi, libukwe ngohlangothi, ukuze kube lula ukubuka okumaphakathi.
Ukucaca
Ibanga ukucaca kwedayimane lomfutho ophakeme wokushisa kwedayimane ngokwezindinganiso ezamukelwa emhlabeni wonke ekukhuliseni okungu-10X, ngokuya ngokubonakala, usayizi, inombolo, indawo kanye nemvelo yezimpawu zangaphakathi nezangaphezulu kulokho kukhulisa.
Sika
Izazi zesayensi yokwakheka komhlaba zizonke izilinganiso, izilinganiso nama-engeli e-facet kuqhathaniswa nezifundo zokukhanya, umlilo, ukucwebezela kwe-scintillation kanye nephethini ukuze kutholwe Ibanga Lokusikwa lamadayimane aphathwe nge-hpht.
Isisindo se-carat
Isigaba sokuqala sezinga ledayimane elinomfutho ophakeme wokushisa okuphezulu ukukala idayimane.Isisindo se-carat iyunithi yesisindo ejwayelekile yamatshe ayigugu.Ibanga ledayimane lezindawo ezimbili zamadesimali ukuze kuqinisekiswe ukunemba.
