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Heart|Lab Grown|IGI

1.51ct D SI1 Heart Lab Grown Diamond

EX • D/SI1 • IGI LG650418911

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG650418911

Diamond specifications and retailer prices

From €193 EUR
As of November 6, 2026
Save €918 EUR (83%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: €1,111 EUR at Brilliant Earth · As of November 6, 2026
View at Brilliant Earth

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 LG650418911 or 650418911. Listed at 14 retailers as of November 6, 2026, with prices from €193 to €1,111, a €918 spread on the same certified stone. Brilliant Earth lists it at €1,111. 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
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.1°
Pavilion angle39°
OriginLab Grown
Grading LabIGI
CertificateIGI LG650418911
Dimensions6.97 × 8.10 × 4.63 mm
L/W Ratio1.16
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
6.97 mm8.10 mm1.51 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG650418911
Side View
Table 56.0%Crown 33.1°Girdle: MED-STKPavilion 39°Culet: NoneDepth 57.2%

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 6
Current: €1,111 EUR|Low: €191 EUR|High: €1,791 EUR|Avg: €571 EUR|-38.0%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 6, 2026
Retailer 4€193 EUR
Retailer 10€216 EUR
Retailer 12€223 EUR
Retailer 7€239 EUR
Retailer 11€322 EUR
Retailer 2€438 EUR
Retailer 3€445 EUR
Retailer 8€467 EUR
Retailer 9€768 EUR
Retailer 5€770 EUR
Retailer 6€957 EUR
Brilliant Earth€1,111 EUR

45 data points across 12 retailers

14 retailers€193 EUR to €1,111 EUR

A
Cheapest Retailer
-
€193 EUR
A
Retailer 2
-
€216 EUR
View
Final sale: no returns
A
Retailer 3
-
€223 EUR
View
A
Retailer 4
-
€239 EUR
View
Retailer 5
-
€246 EUR
View
Price last confirmed 12 days ago
B+
Retailer 6
-
€322 EUR
View
B+
Retailer 7
-
€438 EUR
View
B+
Retailer 8
-
€445 EUR
View
B+
Retailer 9
-
€467 EUR
View
B+
Retailer 10
-
€626 EUR
View
B
Retailer 11
-
€768 EUR
View
B
Retailer 12
-
€770 EUR
View
B
Retailer 13
-
€957 EUR
View
Most Expensive
B
Brilliant Earth
12166023A · Nov 6
€1,111 EUR
$1,240 USD
View
13 more retailers have this diamond
Prices start from €193 EURSave up to €918 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
1.51ct Heart
€193 EUR