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Heart|Lab Grown|IGI

1.03ct I SI1 Heart Lab Grown Diamond

ID • I/SI1 • IGI LG436045977

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG436045977

Diamond specifications and retailer prices

From €555 EUR
$620 USD
As of October 31, 2026
Save €3,047 EUR (85%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: €3,602 EUR at MOH London · As of November 1, 2026
View at MOH London

About this 1.03ct lab-grown heart diamond

This 1.03ct lab-grown heart sits in the classic one-carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG436045977 or 436045977. Listed at 10 retailers as of October 31, 2026, with prices from €555 to €3,602, a €3,047 spread on the same certified stone. MOH London lists it at €3,602. 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

1.03
Carat
I
Color
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle37.6°
Pavilion angle42.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG436045977
Dimensions5.90 × 7.28 × 4.12 mm
L/W Ratio1.23
Girdle conditionFaceted
Culet sizePointed
Top View
5.90 mm7.28 mm1.03 ctI / SI1
OriginLab Grown
CutIdeal
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG436045977
Side View
Table 57.5%Crown 37.6°Girdle: THN-THKPavilion 42.6°Culet: NoneDepth 56.6%

Caratlytics Score

How it works →
A
Excellent
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: Oct 31
Current: €3,602 EUR|Low: €555 EUR|High: €3,650 EUR|Avg: €1,660 EUR|-1.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 1, 2026
Retailer 2€555 EUR
Retailer 3€916 EUR
Retailer 4€1,062 EUR
Retailer 6€1,217 EUR
Retailer 8€1,523 EUR
Retailer 5€1,694 EUR
Retailer 7€2,220 EUR
MOH London€3,602 EUR

13 data points across 8 retailers

10 retailers€555 EUR to €3,602 EUR

A
Cheapest Retailer
-
€555 EUR
$620 USD
B+
Retailer 2
-
€916 EUR
$1,023 USD
View
B+
Retailer 3
-
€996 EUR
$1,113 USD
View
B+
Retailer 4
-
€1,062 EUR
$1,187 USD
View
Retailer 5
-
€1,062 EUR
$1,187 USD
View
Price last confirmed 20 days ago
B+
Retailer 6
-
€1,217 EUR
$1,360 USD
View
B
Retailer 7
-
€1,694 EUR
$1,893 USD
View
B
Retailer 8
-
€1,991 EUR
$2,224 USD
View
B
Retailer 9
-
€2,220 EUR
$2,480 USD
View
Most Expensive
B
MOH London
LG436045977 · Nov 1
€3,602 EUR
£3,169 GBP
View
9 more retailers have this diamond
Prices start from €555 EURSave up to €3,047 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
1.03ct Heart
€555 EUR