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Cushion|Lab Grown|IGI

1.29ct D VS1 Cushion Lab Grown Diamond

GD • D/VS1 • IGI LG651441778

Shape and cutting style on the report: Square cushion brilliant

Certificate IGI LG651441778

Diamond specifications and retailer prices

From £203 GBP
As of November 6, 2026
Save £790 GBP (80%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £1,031 GBP at Brilliant Earth · As of October 19, 2026
View at Brilliant Earth

About this 1.29ct lab-grown cushion diamond

This 1.29ct lab-grown cushion sits in the one-and-a-quarter to one-and-a-half carat band, graded D colour (colourless) and VS1 clarity (very-slightly-included), with a standard cut grade and certified by IGI LG651441778 or 651441778. Listed at 15 retailers as of November 6, 2026, with a 389% 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

1.29
Carat
D
Colour
VS1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.7°
Pavilion angle39.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG651441778
Dimensions6.36 × 6.24 × 4.19 mm
L/W Ratio1.02
Girdle conditionFaceted
Culet sizePointed
Top View
6.36 mm6.24 mm1.29 ctD / VS1
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG651441778
Side View
Table 64.0%Crown 35.7°Girdle: MED-STKPavilion 39.8°Culet: NoneDepth 67.1%

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 6
Current: £1,031 GBP|Low: £175 GBP|High: £1,061 GBP|Avg: £537 GBP|-2.8%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
November 6, 2026
Retailer 12£203 GBP
Retailer 2£299 GBP
Retailer 3£330 GBP
Retailer 15£371 GBP
Retailer 13£378 GBP
Retailer 9£398 GBP
Retailer 8£421 GBP
Retailer 6£453 GBP
Retailer 5£524 GBP
Retailer 4£542 GBP
Retailer 7£598 GBP
Retailer 11£762 GBP
Retailer 10£899 GBP
Retailer 14£994 GBP
Brilliant Earth£1,031 GBP

38 data points across 15 retailers

15 retailers£203 GBP to £994 GBP

A
Cheapest Retailer
-
£203 GBP
Final sale: no returns
B+
Retailer 2
-
£299 GBP
View
A
Retailer 3
-
£330 GBP
View
B+
Retailer 4
-
£371 GBP
View
B+
Retailer 5
-
£378 GBP
View
B+
Retailer 6
-
£398 GBP
View
B+
Retailer 7
-
£421 GBP
View
B+
Retailer 8
-
£453 GBP
View
Retailer 9
-
£524 GBP
View
Price last confirmed 11 days ago
Retailer 10
-
£542 GBP
View
Price last confirmed 10 days ago
B
Retailer 11
-
£598 GBP
View
B
Retailer 12
-
£762 GBP
View
B
Retailer 13
-
£899 GBP
View
B
Retailer 14
-
£994 GBP
View
Most Expensive
Brilliant Earth
11634541A · Oct 19
£1,031 GBP
$1,380 USD
View
Price last confirmed 19 days ago
14 more retailers have this diamond
Prices start from £203 GBPSave up to £790 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
1.29ct Cushion
£203 GBP