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Cushion|Lab Grown|IGI

1.29ct D VS1 Cushion Lab Grown Diamond

VG • D/VS1 • IGI LG660480092

Shape and cutting style on the report: Cushion brilliant

Certificate IGI LG660480092

Diamond specifications and retailer prices

From £165 GBP
As of November 6, 2026
Save £721 GBP (81%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £1,031 GBP at Brilliant Earth · As of October 22, 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 very-good cut grade and certified by IGI LG660480092 or 660480092. Listed at 17 retailers as of November 6, 2026, with a 437% 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
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.8°
Pavilion angle37.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG660480092
Dimensions5.79 × 5.79 × 4.00 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
5.79 mm5.79 mm1.29 ctD / VS1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG660480092
Side View
Table 61.0%Crown 35.8°Girdle: MED-STKPavilion 37.9°Culet: NoneDepth 69.1%

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: Nov 6
Current: £1,031 GBP|Low: £165 GBP|High: £1,031 GBP|Avg: £427 GBP
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 7, 2026
Retailer 4£165 GBP
Retailer 3£183 GBP
Retailer 9£310 GBP
Retailer 7£332 GBP
Retailer 8£335 GBP
Retailer 2£421 GBP
Retailer 10£446 GBP
Retailer 11£456 GBP
Retailer 12£545 GBP
Retailer 5£676 GBP
Retailer 6£851 GBP
Brilliant Earth£1,031 GBP

44 data points across 12 retailers

17 retailers£165 GBP to £886 GBP

A
Cheapest Retailer
-
£165 GBP
Final sale: no returns
A
Retailer 2
-
£183 GBP
View
B+
Retailer 3
-
£247 GBP
View
A
Retailer 4
-
£310 GBP
View
A
Retailer 5
-
£332 GBP
View
A
Retailer 6
-
£335 GBP
View
B+
Retailer 7
-
£386 GBP
View
B+
Retailer 8
-
£421 GBP
View
B+
Retailer 9
-
£446 GBP
View
B+
Retailer 10
-
£456 GBP
View
Retailer 11
-
£545 GBP
View
Price last confirmed 33 days ago
Retailer 12
-
£552 GBP
View
Price last confirmed 90 days ago
B
Retailer 13
-
£628 GBP
View
B
Retailer 14
-
£676 GBP
View
B
Retailer 15
-
£851 GBP
View
B
Retailer 16
-
£886 GBP
View
Most Expensive
Brilliant Earth
21311943A · Oct 22
£1,031 GBP
$1,380 USD
View
Price last confirmed 16 days ago
16 more retailers have this diamond
Prices start from £165 GBPSave up to £721 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
£165 GBP