CaratHunter
Plans
Cushion|Lab Grown|IGI

1.40ct D VVS1 Cushion Lab Grown Diamond

VG • D/VVS1 • IGI LG830620145

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG830620145

Diamond specifications and retailer prices

From £193 GBP
$259 USD
As of October 30, 2026
Save £1,243 GBP (87%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £1,437 GBP at Helzberg Diamonds · As of October 31, 2026
View at Helzberg Diamonds

About this 1.4ct lab-grown cushion diamond

This 1.4ct lab-grown cushion sits in the one-and-a-quarter to one-and-a-half carat band, graded D colour (colourless) and VVS1 clarity (very-very-slightly-included), with a very-good cut grade and certified by IGI LG830620145 or 830620145. Listed at 10 retailers as of October 30, 2026, with prices from £193 to £1,437, a £1,243 spread on the same certified stone. Helzberg Diamonds lists it at £1,437. 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

1.40
Carat
D
Colour
VVS1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.2°
Pavilion angle35.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG830620145
Dimensions8.29 × 5.58 × 3.76 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
8.29 mm5.58 mm1.40 ctD / VVS1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG830620145
Side View
Table 60.0%Crown 34.2°Girdle: MED-STKPavilion 35.3°Culet: NoneDepth 67.4%

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: Oct 30
Current: £1,437 GBP|Low: £193 GBP|High: £1,455 GBP|Avg: £620 GBP
Helzberg Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 31, 2026
Retailer 9£193 GBP
Retailer 6£245 GBP
Retailer 5£363 GBP
Retailer 3£399 GBP
Retailer 2£403 GBP
Retailer 7£566 GBP
Retailer 10£699 GBP
Retailer 8£726 GBP
Retailer 4£1,418 GBP
Helzberg Diamonds£1,437 GBP

3 data points across 10 retailers

10 retailers£193 GBP to £1,437 GBP

A
Cheapest Retailer
-
£193 GBP
$259 USD
Final sale: no returns
A
Retailer 2
-
£245 GBP
View
A
Retailer 3
-
£363 GBP
$486 USD
View
A
Retailer 4
-
£399 GBP
$534 USD
View
A
Retailer 5
-
£403 GBP
View
B+
Retailer 6
-
£566 GBP
$758 USD
View
B+
Retailer 7
-
£699 GBP
SGD 1,265 SGD
View
B+
Retailer 8
-
£726 GBP
$973 USD
View
B
Retailer 9
-
£1,418 GBP
$1,900 USD
View
Most Expensive
B
Helzberg Diamonds
ZXZOJGMIGHKL · Oct 31
£1,437 GBP
$1,925 USD
View
9 more retailers have this diamond
Prices start from £193 GBPSave up to £1,243 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
1.40ct Cushion
£193 GBP