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Heart|Lab Grown|IGI

1.51ct D SI1 Heart Lab Grown Diamond

ID • D/SI1 • IGI LG839634140

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG839634140

Diamond specifications and retailer prices

From €417 EUR
$466 USD
As of November 1, 2026
Save €562 EUR (57%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: €979 EUR at MOH London · As of November 1, 2026
View at MOH London

About this 1.51ct lab-grown heart diamond

This 1.51ct lab-grown heart sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG839634140 or 839634140. Listed at 4 retailers as of November 1, 2026, with prices from €417 to €979, a €562 spread on the same certified stone. MOH London lists it at €979. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.51
Carat
D
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.4°
Pavilion angle37.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG839634140
Dimensions7.87 × 7.02 × 4.58 mm
L/W Ratio1.12
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
7.87 mm7.02 mm1.51 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG839634140
Side View
Table 63.0%Crown 39.4°Girdle: MED-STKPavilion 37.7°Culet: NoneDepth 58.2%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: €979 EUR|Low: €417 EUR|High: €979 EUR|Avg: €503 EUR
MOH London
Retailer 2
Retailer 3
Retailer 4
November 1, 2026
Retailer 4€417 EUR
Retailer 3€447 EUR
Retailer 2€454 EUR
MOH London€979 EUR

3 data points across 4 retailers

4 retailers€417 EUR to €979 EUR

B+
Cheapest Retailer
-
€417 EUR
$466 USD
B+
Retailer 2
-
€447 EUR
$499 USD
View
B+
Retailer 3
-
€454 EUR
£399 GBP
View
Most Expensive
B
MOH London
LG839634140 · Nov 1
€979 EUR
£861 GBP
View
3 more retailers have this diamond
Prices start from €417 EURSave up to €562 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.

B+
1.51ct Heart
€417 EUR