CaratHunter
Plans
Cushion|Lab Grown|IGI

1.37ct D FL Cushion Lab Grown Diamond

VG • D/FL • IGI LG840635023

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG840635023

Diamond specifications and retailer prices

From £382 GBP
$512 USD
As of November 3, 2026
Save £1,551 GBP (80%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £1,933 GBP at Helzberg Diamonds · As of November 3, 2026
View at Helzberg Diamonds

About this 1.37ct lab-grown cushion diamond

This 1.37ct 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 LG840635023 or 840635023. Listed at 16 retailers as of November 3, 2026, with prices from £382 to £1,933, a £1,551 spread on the same certified stone. Helzberg Diamonds lists it at £1,933. 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

1.37
Carat
D
Colour
FL
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.2°
Pavilion angle37.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG840635023
Dimensions8.38 × 5.51 × 3.77 mm
L/W Ratio1.52
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
8.38 mm5.51 mm1.37 ctD / FL
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG840635023
Side View
Table 61.0%Crown 35.2°Girdle: MED-THKPavilion 37.2°Culet: NoneDepth 68.4%

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 3
Current: £1,933 GBP|Low: £382 GBP|High: £2,228 GBP|Avg: £1,010 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
Retailer 14
Retailer 15
November 3, 2026
Retailer 4£382 GBP
Retailer 11£420 GBP
Retailer 5£581 GBP
Retailer 15£619 GBP
Retailer 6£640 GBP
Retailer 8£674 GBP
Retailer 13£681 GBP
Retailer 12£704 GBP
Retailer 3£763 GBP
Retailer 10£998 GBP
Retailer 2£1,174 GBP
Retailer 7£1,413 GBP
Retailer 9£1,499 GBP
Retailer 14£1,908 GBP
Helzberg Diamonds£1,933 GBP

19 data points across 15 retailers

16 retailers£382 GBP to £1,933 GBP

A
Cheapest Retailer
-
£382 GBP
$512 USD
Final sale: no returns
A
Retailer 2
-
£420 GBP
View
A
Retailer 3
-
£581 GBP
$780 USD
View
A
Retailer 4
-
£619 GBP
$830 USD
View
A
Retailer 5
-
£640 GBP
$859 USD
View
A
Retailer 6
-
£674 GBP
View
A
Retailer 7
-
£681 GBP
€870 EUR
View
A
Retailer 8
-
£704 GBP
ZAR 15,256 ZAR
View
A
Retailer 9
-
£763 GBP
$1,024 USD
View
B+
Retailer 10
-
£998 GBP
$1,339 USD
View
B+
Retailer 11
-
£1,174 GBP
$1,575 USD
View
B
Retailer 12
-
£1,413 GBP
SGD 2,562 SGD
View
B
Retailer 13
-
£1,499 GBP
View
B
Retailer 14
-
£1,516 GBP
$2,035 USD
View
B
Retailer 15
-
£1,908 GBP
$2,560 USD
View
Most Expensive
B
Helzberg Diamonds
ZXZOKGMJLGIJ · Nov 3
£1,933 GBP
$2,594 USD
View
15 more retailers have this diamond
Prices start from £382 GBPSave up to £1,551 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
1.37ct Cushion
£382 GBP