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Cushion|Lab Grown|IGI

4.50ct F SI1 Cushion Lab Grown Diamond

ID • F/SI1 • IGI LG778683718

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG778683718

Diamond specifications and retailer prices

From HK$7,768 HKD
$990 USD
As of November 2, 2026
Save HK$35,959 HKD (82%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: HK$43,726 HKD at Mervis Diamond Importers · As of November 2, 2026
View at Mervis Diamond Importers

About this 4.5ct lab-grown cushion diamond

This 4.5ct lab-grown cushion sits in the three to five carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG778683718 or 778683718. Listed at 11 retailers as of November 2, 2026, with prices from HK$7,768 to HK$43,726, a HK$35,959 spread on the same certified stone. Mervis Diamond Importers lists it at HK$43,726. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

4.50
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.4°
Pavilion angle34.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG778683718
Dimensions12.18 × 8.64 × 5.48 mm
L/W Ratio1.41
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
12.18 mm8.64 mm4.50 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG778683718
Side View
Table 60.0%Crown 33.4°Girdle: MED-STKPavilion 34.5°Culet: NoneDepth 63.4%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: HK$43,726 HKD|Low: HK$6,395 HKD|High: HK$47,508 HKD|Avg: HK$17,499 HKD|-8.0%
Mervis Diamond Importers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 2, 2026
Retailer 10HK$6,395 HKD
Retailer 5HK$7,768 HKD
Retailer 9HK$9,023 HKD
Retailer 6HK$9,792 HKD
Retailer 11HK$9,808 HKD
Retailer 2HK$10,815 HKD
Retailer 3HK$17,089 HKD
Retailer 8HK$22,558 HKD
Retailer 7HK$24,982 HKD
Retailer 4HK$26,446 HKD
Mervis Diamond ImportersHK$43,726 HKD

41 data points across 11 retailers

11 retailersHK$7,768 HKD to HK$43,726 HKD

Retailer 1
-
HK$6,395 HKD
$815 USD
Price last confirmed 21 days ago
A
Retailer 2
-
HK$7,768 HKD
$990 USD
View
Retailer 3
-
HK$9,023 HKD
$1,150 USD
View
Price last confirmed 12 days ago
A
Retailer 4
-
HK$9,792 HKD
$1,248 USD
View
A
Retailer 5
-
HK$9,808 HKD
$1,250 USD
View
A
Retailer 6
-
HK$10,815 HKD
£1,085 GBP
View
B+
Retailer 7
-
HK$17,089 HKD
$2,178 USD
View
Retailer 8
-
HK$22,558 HKD
$2,875 USD
View
Price last confirmed 14 days ago
B
Retailer 9
-
HK$24,982 HKD
$3,184 USD
View
B
Retailer 10
-
HK$26,446 HKD
£2,654 GBP
View
Most Expensive
B
Mervis Diamond Importers
1985410031 · Nov 2
HK$43,726 HKD
$5,573 USD
View
10 more retailers have this diamond
Prices start from HK$7,768 HKDSave up to HK$35,959 HKD

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
4.50ct Cushion
HK$7,768 HKD