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Cushion|Lab Grown|IGI

1.26ct D FL Cushion Lab Grown Diamond

VG • D/FL • IGI LG840634410

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG840634410

Diamond specifications and retailer prices

From £352 GBP
$471 USD
As of November 1, 2026
Save £1,444 GBP (80%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £1,796 GBP at Helzberg Diamonds · As of November 1, 2026
View at Helzberg Diamonds

About this 1.26ct lab-grown cushion diamond

This 1.26ct lab-grown cushion sits in the one-and-a-quarter to one-and-a-half carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a very-good cut grade and certified by IGI LG840634410 or 840634410. Listed at 13 retailers as of November 1, 2026, with prices from £352 to £1,796, a £1,444 spread on the same certified stone. Helzberg Diamonds lists it at £1,796. 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

1.26
Carat
D
Colour
FL
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle35.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG840634410
Dimensions8.01 × 5.39 × 3.71 mm
L/W Ratio1.49
Girdle conditionFaceted
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
8.01 mm5.39 mm1.26 ctD / FL
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG840634410
Side View
Table 55.0%Crown 35°Girdle: STK-THKPavilion 35.5°Culet: NoneDepth 68.8%

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 1
Current: £1,796 GBP|Low: £352 GBP|High: £1,796 GBP|Avg: £852 GBP
Helzberg Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 2, 2026
Retailer 13£352 GBP
Retailer 7£389 GBP
Retailer 3£551 GBP
Retailer 10£571 GBP
Retailer 8£581 GBP
Retailer 4£599 GBP
Retailer 2£616 GBP
Retailer 9£649 GBP
Retailer 11£657 GBP
Retailer 12£1,241 GBP
Retailer 5£1,311 GBP
Retailer 6£1,477 GBP
Helzberg Diamonds£1,796 GBP

15 data points across 13 retailers

13 retailers£352 GBP to £1,796 GBP

A
Cheapest Retailer
-
£352 GBP
$471 USD
Final sale: no returns
A
Retailer 2
-
£389 GBP
View
A
Retailer 3
-
£551 GBP
$738 USD
View
A
Retailer 4
-
£571 GBP
$765 USD
View
A
Retailer 5
-
£581 GBP
€741 EUR
View
A
Retailer 6
-
£599 GBP
$802 USD
View
A
Retailer 7
-
£616 GBP
View
A
Retailer 8
-
£649 GBP
ZAR 14,059 ZAR
View
A
Retailer 9
-
£657 GBP
$880 USD
View
B+
Retailer 10
-
£1,241 GBP
$1,663 USD
View
B
Retailer 11
-
£1,311 GBP
SGD 2,373 SGD
View
B
Retailer 12
-
£1,477 GBP
View
Most Expensive
B
Helzberg Diamonds
ZXZOKGMJKKHG · Nov 1
£1,796 GBP
$2,406 USD
View
12 more retailers have this diamond
Prices start from £352 GBPSave up to £1,444 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
1.26ct Cushion
£352 GBP