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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 $1,665 USD
£1,311 GBP
As of October 26, 2026
Save $3,886 USD (70%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $12,548 USD 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
Color
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: $1,665 USD|Low: $1,525 USD|High: $5,948 USD|Avg: $3,209 USD|-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$1,525 USD
Retailer 1$1,665 USD
Retailer 5$1,690 USD
Retailer 4$1,735 USD
Retailer 8$1,933 USD
Retailer 6$2,265 USD
Retailer 9$2,495 USD
Retailer 7$3,027 USD
Retailer 10$3,703 USD
Retailer 11$3,810 USD
Retailer 13$4,256 USD
Retailer 3$4,851 USD
Retailer 2$5,551 USD

40 data points across 13 retailers

13 retailers$1,665 USD to $5,551 USD

A
Cheapest Retailer
-
$1,665 USD
£1,311 GBP
Retailer 2
-
$1,690 USD
View
Price last confirmed 18 days ago
A
Retailer 3
-
$1,735 USD
View
A
Retailer 4
-
$1,933 USD
View
A
Retailer 5
-
$2,265 USD
£1,783 GBP
View
Retailer 6
-
$2,495 USD
View
Price last confirmed 7 days ago
A
Retailer 7
-
$3,027 USD
ZAR 48,905 ZAR
View
B+
Retailer 8
-
$3,703 USD
View
B+
Retailer 9
-
$3,810 USD
£3,000 GBP
View
B+
Retailer 10
-
$4,256 USD
View
Retailer 11
-
$4,851 USD
£3,820 GBP
View
Price last confirmed 9 days ago
B
Retailer 12
-
$5,551 USD
View
Most Expensive
Queensmith
LG629404673 · Oct 9
$12,548 USD
£9,880 GBP
View
Price last confirmed 21 days ago
12 more retailers have this diamond
Prices start from $1,665 USDSave up to $3,886 USD

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
$1,665 USD