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Cushion|Lab Grown|IGI

1.23ct D IF Cushion Lab Grown Diamond

ID • D/IF • IGI LG837628359

Shape and cutting style on the report: Cushion modified brilliant

Certificate IGI LG837628359

Diamond specifications and retailer prices

From £465 GBP
As of November 4, 2026
Save £1,298 GBP (74%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £1,763 GBP at Yadav Diamonds · As of November 4, 2026
View at Yadav 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 IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG837628359 or 837628359. Listed at 9 retailers as of November 4, 2026, with prices from £465 to £1,763, a £1,298 spread on the same certified stone. Yadav Diamonds lists it at £1,763. Compare the cross-retailer prices above before buying. The same certified stone often varies 15 to 40% across stores.

The 4Cs

1.23
Carat
D
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34°
Pavilion angle39.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG837628359
Dimensions7.43 × 5.76 × 3.83 mm
L/W Ratio1.29
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
7.43 mm5.76 mm1.23 ctD / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG837628359
Side View
Table 60.0%Crown 34°Girdle: MED-STKPavilion 39.1°Culet: NoneDepth 66.5%

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: £1,036 GBP|Low: £291 GBP|High: £1,763 GBP|Avg: £801 GBP
Retailer 1
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Yadav Diamonds
October 8, 2026
Retailer 9£291 GBP
Retailer 16£305 GBP
Retailer 5£407 GBP
Retailer 6£440 GBP
Retailer 17£452 GBP
Retailer 13£465 GBP
Retailer 18£501 GBP
Retailer 7£517 GBP
Retailer 2£604 GBP
Retailer 12£629 GBP
Retailer 8£976 GBP
Retailer 10£1,034 GBP
Retailer 1£1,036 GBP
Retailer 4£1,167 GBP
Retailer 3£1,190 GBP
Retailer 11£1,223 GBP
Retailer 15£1,276 GBP
Retailer 14£1,652 GBP
Yadav Diamonds£1,763 GBP

11 data points across 19 retailers

9 retailers£465 GBP to £1,763 GBP

A
Cheapest Retailer
-
£465 GBP
Retailer 2
-
£501 GBP
View
Price last confirmed 34 days ago
A
Retailer 3
-
£629 GBP
View
B+
Retailer 4
-
£1,036 GBP
View
Retailer 5
-
£1,190 GBP
View
Price last confirmed 34 days ago
B
Retailer 6
-
£1,223 GBP
View
Retailer 7
-
£1,276 GBP
View
Price last confirmed 32 days ago
Retailer 8
-
£1,652 GBP
View
Price last confirmed 31 days ago
Most Expensive
B
Yadav Diamonds
13312131 · Nov 4
£1,763 GBP
$2,380 USD
View
8 more retailers have this diamond
Prices start from £465 GBPSave up to £1,298 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
£465 GBP