CaratHunter
Plans
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 $215 USD
As of November 2, 2026
Save $1,025 USD (83%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $1,240 USD at Brilliant Earth · As of November 2, 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 13 retailers as of November 2, 2026, with prices from $215 to $1,240, a $1,025 spread on the same certified stone. Brilliant Earth lists it at $1,240. 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
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
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 2
Current: $1,240 USD|Low: $213 USD|High: $2,000 USD|Avg: $647 USD|-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 2, 2026
Retailer 4$215 USD
Retailer 10$241 USD
Retailer 12$249 USD
Retailer 7$267 USD
Retailer 11$360 USD
Retailer 5$490 USD
Retailer 3$497 USD
Retailer 8$521 USD
Retailer 2$699 USD
Retailer 9$857 USD
Retailer 6$1,068 USD
Brilliant Earth$1,240 USD

43 data points across 12 retailers

13 retailers$215 USD to $1,240 USD

A
Cheapest Retailer
-
$215 USD
A
Retailer 2
-
$241 USD
View
Final sale: no returns
A
Retailer 3
-
$249 USD
View
A
Retailer 4
-
$267 USD
View
Retailer 5
-
$275 USD
View
Price last confirmed 8 days ago
B+
Retailer 6
-
$360 USD
View
B+
Retailer 7
-
$490 USD
£386 GBP
View
B+
Retailer 8
-
$497 USD
View
B+
Retailer 9
-
$521 USD
View
B+
Retailer 10
-
$699 USD
View
B
Retailer 11
-
$857 USD
View
B
Retailer 12
-
$1,068 USD
£841 GBP
View
Most Expensive
B
Brilliant Earth
12166023A · Nov 2
$1,240 USD
View
12 more retailers have this diamond
Prices start from $215 USDSave up to $1,025 USD

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
$215 USD