CaratHunter
Plans
Cushion|Lab Grown|IGI

6.31ct D VS1 Cushion Lab Grown Diamond

EX • D/VS1 • IGI LG629404672

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG629404672

Diamond specifications and retailer prices

From HK$13,062 HKD
£1,311 GBP
As of October 26, 2026
Save HK$30,486 HKD (70%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: HK$98,445 HKD at Queensmith · As of October 9, 2026
View at Queensmith

About this 6.31ct lab-grown cushion diamond

This 6.31ct lab-grown cushion sits in the over five carat band, graded D colour (colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG629404672 or 629404672. Listed at 13 retailers as of October 26, 2026, with a 233% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

6.31
Carat
D
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40.5°
Pavilion angle32.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG629404672
Dimensions10.44 × 9.95 × 6.69 mm
L/W Ratio1.05
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
10.44 mm9.95 mm6.31 ctD / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG629404672
Side View
Table 64.0%Crown 40.5°Girdle: MED-THKPavilion 32.1°Culet: NoneDepth 67.2%

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: Oct 26
Current: HK$13,062 HKD|Low: HK$11,965 HKD|High: HK$46,663 HKD|Avg: HK$25,190 HKD|-7.5%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
October 26, 2026
Retailer 12HK$11,965 HKD
Retailer 1HK$13,062 HKD
Retailer 5HK$13,259 HKD
Retailer 4HK$13,612 HKD
Retailer 8HK$15,166 HKD
Retailer 6HK$17,770 HKD
Retailer 9HK$19,575 HKD
Retailer 7HK$23,751 HKD
Retailer 10HK$29,053 HKD
Retailer 11HK$29,892 HKD
Retailer 13HK$33,391 HKD
Retailer 3HK$38,063 HKD
Retailer 2HK$43,548 HKD

39 data points across 13 retailers

13 retailersHK$13,062 HKD to HK$43,548 HKD

A
Cheapest Retailer
-
HK$13,062 HKD
£1,311 GBP
Retailer 2
-
HK$13,259 HKD
$1,690 USD
View
Price last confirmed 19 days ago
A
Retailer 3
-
HK$13,612 HKD
$1,735 USD
View
A
Retailer 4
-
HK$15,166 HKD
$1,933 USD
View
A
Retailer 5
-
HK$17,770 HKD
£1,783 GBP
View
Retailer 6
-
HK$19,575 HKD
$2,495 USD
View
Price last confirmed 8 days ago
A
Retailer 7
-
HK$23,751 HKD
ZAR 48,905 ZAR
View
B+
Retailer 8
-
HK$29,053 HKD
$3,703 USD
View
B+
Retailer 9
-
HK$29,892 HKD
£3,000 GBP
View
B+
Retailer 10
-
HK$33,391 HKD
$4,256 USD
View
Retailer 11
-
HK$38,063 HKD
£3,820 GBP
View
Price last confirmed 10 days ago
B
Retailer 12
-
HK$43,548 HKD
$5,551 USD
View
Most Expensive
Queensmith
LG629404672 · Oct 9
HK$98,445 HKD
£9,880 GBP
View
Price last confirmed 22 days ago
12 more retailers have this diamond
Prices start from HK$13,062 HKDSave up to HK$30,486 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
6.31ct Cushion
HK$13,062 HKD