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Cushion|Lab Grown|IGI

6.31ct D VS1 Cushion Lab Grown Diamond

VG • D/VS1 • IGI LG629404673

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG629404673

Diamond specifications and retailer prices

From $2,370 AUD
£1,311 GBP
As of October 26, 2026
Save $5,532 AUD (70%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $17,863 AUD 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 very-good cut grade and certified by IGI LG629404673 or 629404673. 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. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

6.31
Carat
D
Colour
VS1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle41.2°
Pavilion angle32.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG629404673
Dimensions10.31 × 9.82 × 6.83 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
10.31 mm9.82 mm6.31 ctD / VS1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG629404673
Side View
Table 62.0%Crown 41.2°Girdle: MED-THKPavilion 32.4°Culet: NoneDepth 69.6%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 26
Current: $2,370 AUD|Low: $2,171 AUD|High: $8,467 AUD|Avg: $4,568 AUD|-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 12$2,171 AUD
Retailer 1$2,370 AUD
Retailer 5$2,406 AUD
Retailer 4$2,470 AUD
Retailer 8$2,752 AUD
Retailer 6$3,224 AUD
Retailer 9$3,552 AUD
Retailer 7$4,310 AUD
Retailer 10$5,272 AUD
Retailer 11$5,424 AUD
Retailer 13$6,059 AUD
Retailer 3$6,906 AUD
Retailer 2$7,902 AUD

40 data points across 13 retailers

13 retailers$2,370 AUD to $7,902 AUD

A
Cheapest Retailer
-
$2,370 AUD
£1,311 GBP
Retailer 2
-
$2,406 AUD
$1,690 USD
View
Price last confirmed 19 days ago
A
Retailer 3
-
$2,470 AUD
$1,735 USD
View
A
Retailer 4
-
$2,752 AUD
$1,933 USD
View
A
Retailer 5
-
$3,224 AUD
£1,783 GBP
View
Retailer 6
-
$3,552 AUD
$2,495 USD
View
Price last confirmed 8 days ago
A
Retailer 7
-
$4,310 AUD
ZAR 48,905 ZAR
View
B+
Retailer 8
-
$5,272 AUD
$3,703 USD
View
B+
Retailer 9
-
$5,424 AUD
£3,000 GBP
View
B+
Retailer 10
-
$6,059 AUD
$4,256 USD
View
Retailer 11
-
$6,906 AUD
£3,820 GBP
View
Price last confirmed 10 days ago
B
Retailer 12
-
$7,902 AUD
$5,551 USD
View
Most Expensive
Queensmith
LG629404673 · Oct 9
$17,863 AUD
£9,880 GBP
View
Price last confirmed 22 days ago
12 more retailers have this diamond
Prices start from $2,370 AUDSave up to $5,532 AUD

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
$2,370 AUD