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Cushion|Lab Grown|IGI

6.29ct D VS1 Cushion Lab Grown Diamond

EX • D/VS1 • IGI LG848631807

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG848631807

Diamond specifications and retailer prices

From £1,688 GBP
As of October 31, 2026
Save £4,223 GBP (71%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £5,911 GBP at Brilliant Earth · As of October 30, 2026
View at Brilliant Earth

About this 6.29ct lab-grown cushion diamond

This 6.29ct 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 LG848631807 or 848631807. Listed at 2 retailers as of October 30, 2026, with prices from £1,688 to £5,911, a £4,223 spread on the same certified stone. Brilliant Earth lists it at £5,911. 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

6.29
Carat
D
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.9°
Pavilion angle35.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG848631807
Dimensions12.43 × 9.71 × 6.55 mm
L/W Ratio1.28
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
12.43 mm9.71 mm6.29 ctD / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG848631807
Side View
Table 58.0%Crown 35.9°Girdle: MED-STKPavilion 35.4°Culet: NoneDepth 67.5%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 31
Current: £5,911 GBP|Low: £1,678 GBP|High: £11,158 GBP|Avg: £5,372 GBP|-47.0%
Brilliant Earth
Retailer 2
October 31, 2026
Retailer 2£1,688 GBP
Brilliant Earth£5,911 GBP

5 data points across 2 retailers

2 retailers£1,688 GBP to £5,911 GBP

A
Cheapest Retailer
-
£1,688 GBP
Most Expensive
B
Brilliant Earth
22321212A · Oct 30
£5,911 GBP
$7,920 USD
View
1 more retailer has this diamond
Prices start from £1,688 GBPSave up to £4,223 GBP

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
6.29ct Cushion
£1,688 GBP