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Cushion|Lab Grown|IGI

1.27ct D FL Cushion Lab Grown Diamond

VG • D/FL • IGI LG830620288

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG830620288

Diamond specifications and retailer prices

From £355 GBP
$475 USD
As of November 1, 2026
Save £1,474 GBP (81%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £1,829 GBP at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 1.27ct lab-grown cushion diamond

This 1.27ct 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 LG830620288 or 830620288. Listed at 13 retailers as of October 31, 2026, with prices from £355 to £1,829, a £1,474 spread on the same certified stone. Brilliant Earth lists it at £1,829. 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

1.27
Carat
D
Colour
FL
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.2°
Pavilion angle34°
OriginLab Grown
Grading LabIGI
CertificateIGI LG830620288
Dimensions8.28 × 5.33 × 3.52 mm
L/W Ratio1.55
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
8.28 mm5.33 mm1.27 ctD / FL
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG830620288
Side View
Table 59.0%Crown 34.2°Girdle: MED-STKPavilion 34°Culet: NoneDepth 66.0%

Caratlytics Score

How it works →
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 1
Current: £1,829 GBP|Low: £355 GBP|High: £1,829 GBP|Avg: £909 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
Retailer 13
November 2, 2026
Retailer 13£355 GBP
Retailer 8£392 GBP
Retailer 10£575 GBP
Retailer 11£602 GBP
Retailer 6£621 GBP
Retailer 9£635 GBP
Retailer 2£657 GBP
Retailer 12£666 GBP
Retailer 5£1,250 GBP
Retailer 4£1,319 GBP
Retailer 7£1,488 GBP
Retailer 3£1,810 GBP
Brilliant Earth£1,829 GBP

8 data points across 13 retailers

13 retailers£355 GBP to £1,829 GBP

A
Cheapest Retailer
-
£355 GBP
$475 USD
Final sale: no returns
A
Retailer 2
-
£392 GBP
View
A
Retailer 3
-
£575 GBP
$770 USD
View
A
Retailer 4
-
£602 GBP
$806 USD
View
A
Retailer 5
-
£621 GBP
View
A
Retailer 6
-
£635 GBP
€810 EUR
View
A
Retailer 7
-
£657 GBP
ZAR 14,213 ZAR
View
A
Retailer 8
-
£666 GBP
$893 USD
View
B
Retailer 9
-
£1,250 GBP
$1,675 USD
View
B
Retailer 10
-
£1,319 GBP
SGD 2,389 SGD
View
B
Retailer 11
-
£1,488 GBP
View
B
Retailer 12
-
£1,810 GBP
$2,425 USD
View
Most Expensive
B
Brilliant Earth
22311018A · Oct 31
£1,829 GBP
$2,450 USD
View
12 more retailers have this diamond
Prices start from £355 GBPSave up to £1,474 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
1.27ct Cushion
£355 GBP