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Cushion|Lab Grown|IGI

4.05ct F SI1 Cushion Lab Grown Diamond

EX • F/SI1 • IGI LG823613807

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG823613807

Diamond specifications and retailer prices

From HK$3,775 HKD
£379 GBP
As of November 2, 2026
Save HK$14,428 HKD (79%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: HK$18,203 HKD at Rare Carat · As of October 28, 2026
View at Rare Carat

About this 4.05ct lab-grown cushion diamond

This 4.05ct 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 LG823613807 or 823613807. Listed at 11 retailers as of October 28, 2026, with prices from HK$3,775 to HK$18,203, a HK$14,428 spread on the same certified stone. Rare Carat lists it at HK$18,203. 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

4.05
Carat
F
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.2°
Pavilion angle37.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG823613807
Dimensions10.04 × 9.05 × 5.70 mm
L/W Ratio1.11
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
10.04 mm9.05 mm4.05 ctF / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG823613807
Side View
Table 64.0%Crown 34.2°Girdle: MED-THKPavilion 37.9°Culet: NoneDepth 63.0%

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$3,775 HKD|Low: HK$3,353 HKD|High: HK$16,451 HKD|Avg: HK$8,393 HKD|-1.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 1HK$3,775 HKD
Retailer 9HK$3,947 HKD
Retailer 10HK$4,378 HKD
Retailer 5HK$5,492 HKD
Retailer 2HK$5,869 HKD
Retailer 4HK$7,180 HKD
Retailer 8HK$8,999 HKD
Retailer 6HK$14,321 HKD
Retailer 7HK$14,894 HKD
Retailer 3HK$16,073 HKD

31 data points across 10 retailers

11 retailersHK$3,775 HKD to HK$18,203 HKD

A
Cheapest Retailer
-
HK$3,775 HKD
£379 GBP
A
Retailer 2
-
HK$3,947 HKD
$503 USD
View
Final sale: no returns
Retailer 3
-
HK$4,378 HKD
$558 USD
View
Price last confirmed 17 days ago
A
Retailer 4
-
HK$5,492 HKD
$700 USD
View
B+
Retailer 5
-
HK$5,869 HKD
$748 USD
View
A
Retailer 6
-
HK$7,180 HKD
£721 GBP
View
A
Retailer 7
-
HK$8,999 HKD
$1,147 USD
View
B
Retailer 8
-
HK$14,321 HKD
$1,825 USD
View
B
Retailer 9
-
HK$14,894 HKD
$1,898 USD
View
B
Retailer 10
-
HK$16,073 HKD
£1,613 GBP
View
Most Expensive
B
Rare Carat
G 2 A_l_823613807 · Oct 28
HK$18,203 HKD
$2,320 USD
View
10 more retailers have this diamond
Prices start from HK$3,775 HKDSave up to HK$14,428 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
4.05ct Cushion
HK$3,775 HKD