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Cushion|Lab Grown|IGI

4.57ct F SI1 Cushion Lab Grown Diamond

EX • F/SI1 • IGI LG644434421

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG644434421

Diamond specifications and retailer prices

From HK$5,845 HKD
$745 USD
As of November 2, 2026
Save HK$22,087 HKD (79%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: HK$27,932 HKD at Brilliant Earth · As of November 2, 2026
View at Brilliant Earth

About this 4.57ct lab-grown cushion diamond

This 4.57ct 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 LG644434421 or 644434421. Listed at 8 retailers as of November 2, 2026, with prices from HK$5,845 to HK$27,932, a HK$22,087 spread on the same certified stone. Brilliant Earth lists it at HK$27,932. 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

4.57
Carat
F
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.7°
Pavilion angle36.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG644434421
Dimensions12.07 × 8.90 × 5.85 mm
L/W Ratio1.36
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
12.07 mm8.90 mm4.57 ctF / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG644434421
Side View
Table 61.0%Crown 34.7°Girdle: MED-THKPavilion 36.4°Culet: NoneDepth 65.7%

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$27,932 HKD|Low: HK$4,131 HKD|High: HK$54,373 HKD|Avg: HK$13,453 HKD|-48.6%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 6HK$4,131 HKD
Retailer 8HK$4,763 HKD
Retailer 5HK$5,845 HKD
Retailer 7HK$7,422 HKD
Retailer 4HK$7,728 HKD
Retailer 2HK$7,920 HKD
Retailer 9HK$8,144 HKD
Retailer 10HK$10,631 HKD
Retailer 3HK$19,889 HKD
Brilliant EarthHK$27,932 HKD

36 data points across 10 retailers

8 retailersHK$5,845 HKD to HK$27,932 HKD

A
Cheapest Retailer
-
HK$5,845 HKD
$745 USD
B+
Retailer 2
-
HK$7,422 HKD
$946 USD
View
A
Retailer 3
-
HK$7,728 HKD
€938 EUR
View
A
Retailer 4
-
HK$7,920 HKD
£795 GBP
View
A
Retailer 5
-
HK$8,144 HKD
$1,038 USD
View
B+
Retailer 6
-
HK$10,631 HKD
$1,355 USD
View
B
Retailer 7
-
HK$19,889 HKD
£1,996 GBP
View
Most Expensive
B
Brilliant Earth
11882263A · Nov 2
HK$27,932 HKD
$3,560 USD
View
7 more retailers have this diamond
Prices start from HK$5,845 HKDSave up to HK$22,087 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
4.57ct Cushion
HK$5,845 HKD