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Heart|Lab Grown|IGI

1.00ct E SI1 Heart Lab Grown Diamond

ID • E/SI1 • IGI LG837666974

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG837666974

Diamond specifications and retailer prices

From €281 EUR
As of October 31, 2026
Save €460 EUR (62%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: €741 EUR at MOH London · As of November 1, 2026
View at MOH London

About this 1ct lab-grown heart diamond

This 1ct lab-grown heart sits in the classic one-carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG837666974 or 837666974. Listed at 4 retailers as of October 31, 2026, with prices from €281 to €741, a €460 spread on the same certified stone. MOH London lists it at €741. 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

1.00
Carat
E
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG837666974
Dimensions6.33 × 6.81 × 3.97 mm
L/W Ratio1.08
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.33 mm6.81 mm1.00 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG837666974
Side View
Table 69.0%Crown 36°Girdle: STK-THKPavilion 40.5°Culet: NoneDepth 58.3%

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: Oct 31
Current: €741 EUR|Low: €281 EUR|High: €745 EUR|Avg: €402 EUR|-0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
November 1, 2026
Retailer 2€281 EUR
Retailer 4€294 EUR
Retailer 3€444 EUR
MOH London€741 EUR

6 data points across 4 retailers

4 retailers€281 EUR to €741 EUR

A
Cheapest Retailer
-
€281 EUR
B+
Retailer 2
-
€294 EUR
$328 USD
View
B
Retailer 3
-
€444 EUR
$496 USD
View
Most Expensive
B
MOH London
LG837666974 · Nov 1
€741 EUR
£652 GBP
View
3 more retailers have this diamond
Prices start from €281 EURSave up to €460 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
1.00ct Heart
€281 EUR