Radiant|Lab Grown|IGI

1.23ct D FL Radiant Lab Grown Diamond

ID • D/FL • IGI LG811638351

Shape and cutting style on the report: Cut cornered rectangular modified brilliant

Certificate IGI LG811638351

Diamond specifications and retailer prices

From €291 EUR
£256 GBP
As of November 1, 2026
Save €1,687 EUR (85%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: €2,130 EUR at Rare Carat · As of October 18, 2026
View at Rare Carat

About this 1.23ct lab-grown radiant diamond

This 1.23ct lab-grown radiant sits in the classic one-carat band, graded D colour (colourless) and FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG811638351 or 811638351. Listed at 8 retailers as of November 1, 2026, with a 580% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
Color
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle42.8°
Pavilion angle35.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG811638351
Dimensions7.72 × 5.28 × 3.61 mm
L/W Ratio1.46
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
7.72 mm5.28 mm1.23 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG811638351
Side View
Table 67.0%Crown 42.8°Girdle: MediumPavilion 35.6°Culet: NoneDepth 68.4%

Caratlytics Score

How it works →
A+
Exceptional
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 1
Current: €2,130 EUR|Low: €233 EUR|High: €2,837 EUR|Avg: €979 EUR|+6.8%
Rare Carat
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
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Retailer 15
Retailer 16
November 1, 2026
Retailer 4€233 EUR
Retailer 8€263 EUR
Retailer 9€291 EUR
Retailer 15€425 EUR
Retailer 13€433 EUR
Retailer 6€664 EUR
Retailer 3€679 EUR
Retailer 16€720 EUR
Retailer 7€746 EUR
Retailer 12€825 EUR
Retailer 14€957 EUR
Retailer 2€1,132 EUR
Retailer 5€1,355 EUR
Retailer 10€1,728 EUR
Retailer 11€1,978 EUR
Rare Carat€2,130 EUR

20 data points across 16 retailers

8 retailers€291 EUR to €1,978 EUR

A+
Cheapest Retailer
-
€291 EUR
£256 GBP
A
Retailer 2
-
€433 EUR
$484 USD
View
B+
Retailer 3
-
€825 EUR
$922 USD
View
B+
Retailer 4
-
€957 EUR
$1,069 USD
View
B+
Retailer 5
-
€1,132 EUR
£996 GBP
View
B
Retailer 6
-
€1,728 EUR
$1,930 USD
View
B
Retailer 7
-
€1,978 EUR
$2,210 USD
View
Most Expensive
Rare Carat
PD-223153 · Oct 18
€2,130 EUR
$2,380 USD
View
Price last confirmed 13 days ago
7 more retailers have this diamond
Prices start from €291 EURSave up to €1,687 EUR

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 Radiant
€291 EUR