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Cushion|Lab Grown|IGI

1.23ct D VVS1 Cushion Lab Grown Diamond

VG • D/VVS1 • IGI LG830620278

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG830620278

Diamond specifications and retailer prices

From £171 GBP
As of November 4, 2026
Save £1,107 GBP (87%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £1,278 GBP at Helzberg Diamonds · As of November 4, 2026
View at Helzberg Diamonds

About this 1.23ct lab-grown cushion diamond

This 1.23ct lab-grown cushion sits in the classic one-carat band, graded D colour (colourless) and VVS1 clarity (very-very-slightly-included), with a very-good cut grade and certified by IGI LG830620278 or 830620278. Listed at 15 retailers as of November 4, 2026, with prices from £171 to £1,278, a £1,107 spread on the same certified stone. Helzberg Diamonds lists it at £1,278. 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

1.23
Carat
D
Colour
VVS1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37°
Pavilion angle36.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG830620278
Dimensions7.73 × 5.27 × 3.69 mm
L/W Ratio1.47
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
7.73 mm5.27 mm1.23 ctD / VVS1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG830620278
Side View
Table 59.0%Crown 37°Girdle: MED-THKPavilion 36.6°Culet: NoneDepth 70.0%

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 4
Current: £1,278 GBP|Low: £171 GBP|High: £1,278 GBP|Avg: £508 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
November 4, 2026
Retailer 3£171 GBP
Retailer 2£216 GBP
Retailer 11£321 GBP
Retailer 9£327 GBP
Retailer 13£327 GBP
Retailer 7£345 GBP
Retailer 14£443 GBP
Retailer 5£463 GBP
Retailer 8£494 GBP
Retailer 4£619 GBP
Retailer 6£648 GBP
Retailer 12£715 GBP
Retailer 10£759 GBP
Helzberg Diamonds£1,278 GBP

10 data points across 14 retailers

15 retailers£171 GBP to £1,278 GBP

A
Cheapest Retailer
-
£171 GBP
Final sale: no returns
A
Retailer 2
-
£216 GBP
View
A
Retailer 3
-
£321 GBP
View
A
Retailer 4
-
£327 GBP
View
A
Retailer 5
-
£327 GBP
View
A
Retailer 6
-
£345 GBP
View
B+
Retailer 7
-
£443 GBP
View
Retailer 8
-
£463 GBP
View
Price last confirmed 9 days ago
B+
Retailer 9
-
£494 GBP
View
B
Retailer 10
-
£619 GBP
View
B
Retailer 11
-
£648 GBP
View
Retailer 12
-
£715 GBP
View
Price last confirmed 8 days ago
B
Retailer 13
-
£759 GBP
View
B
Retailer 14
-
£933 GBP
View
Most Expensive
B
Helzberg Diamonds
ZXZOJGMIGINO · Nov 4
£1,278 GBP
$1,725 USD
View
14 more retailers have this diamond
Prices start from £171 GBPSave up to £1,107 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
1.23ct Cushion
£171 GBP