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Cushion|Lab Grown|IGI

1.23ct D FL Cushion Lab Grown Diamond

GD • D/FL

Diamond specifications and retailer prices

From £543 GBP
$727 USD
As of November 1, 2026
Save £1,216 GBP (69%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £1,758 GBP at Helzberg Diamonds · As of November 1, 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 FL clarity (flawless or internally-flawless), with a standard cut grade and certified by IGI. Listed at 2 retailers as of November 1, 2026, with prices from £543 to £1,758, a £1,216 spread on the same certified stone. Helzberg Diamonds lists it at £1,758. 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
FL
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginLab Grown
Grading LabIGI
Dimensions7.83 × 5.25 mm
L/W Ratio1.49
Top View
7.83 mm5.25 mm1.23 ctD / FL
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI
Side View
Table 60.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 69.0%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 1
Current: £1,758 GBP|Low: £543 GBP|High: £2,255 GBP|Avg: £1,323 GBP|-22.0%
Helzberg Diamonds
Retailer 2
October 23, 2026
Retailer 2£543 GBP
Helzberg Diamonds£1,758 GBP

6 data points across 2 retailers

2 retailers£543 GBP to £1,758 GBP

A
Cheapest Retailer
-
£543 GBP
$727 USD
Most Expensive
B
Helzberg Diamonds
ZXZOJMMIGKPP · Nov 1
£1,758 GBP
$2,356 USD
View
1 more retailer has this diamond
Prices start from £543 GBPSave up to £1,216 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
£543 GBP