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Heart|Lab Grown|IGI

1.23ct D FL Heart Lab Grown Diamond

ID • D/FL • IGI LG840623487

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG840623487

Diamond specifications and retailer prices

From €609 EUR
As of November 4, 2026
Save €962 EUR (61%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: €1,571 EUR at With Clarity · As of November 5, 2026
View at With Clarity

About this 1.23ct lab-grown heart diamond

This 1.23ct lab-grown heart 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 LG840623487 or 840623487. Listed at 6 retailers as of November 4, 2026, with prices from €609 to €1,571, a €962 spread on the same certified stone. With Clarity lists it at €1,571. 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
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37.3°
Pavilion angle36.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG840623487
Dimensions6.60 × 7.34 × 4.27 mm
L/W Ratio1.11
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
6.60 mm7.34 mm1.23 ctD / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG840623487
Side View
Table 55.0%Crown 37.3°Girdle: MED-THKPavilion 36.9°Culet: NoneDepth 58.2%

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: €673 EUR|Low: €609 EUR|High: €1,571 EUR|Avg: €1,131 EUR
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
With Clarity
November 5, 2026
Retailer 4€609 EUR
Retailer 1€673 EUR
Retailer 3€1,254 EUR
Retailer 5€1,367 EUR
Retailer 2€1,475 EUR
With Clarity€1,571 EUR

2 data points across 6 retailers

6 retailers€609 EUR to €1,571 EUR

A
Cheapest Retailer
-
€609 EUR
B+
Retailer 2
-
€673 EUR
View
B
Retailer 3
-
€1,254 EUR
View
B
Retailer 4
-
€1,367 EUR
View
B
Retailer 5
-
€1,475 EUR
View
Most Expensive
B
With Clarity
840623487 · Nov 5
€1,571 EUR
$1,770 USD
View
5 more retailers have this diamond
Prices start from €609 EURSave up to €962 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 Heart
€609 EUR