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Heart|Lab Grown|IGI

1.51ct D SI1 Heart Lab Grown Diamond

ID • D/SI1 • IGI LG700570324

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG700570324

Diamond specifications and retailer prices

From $204 USD
As of October 30, 2026
Save $1,036 USD (84%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $1,240 USD at Brilliant Earth · As of October 31, 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 LG700570324 or 700570324. Listed at 16 retailers as of October 30, 2026, with prices from $204 to $1,240, a $1,036 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
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.8°
Pavilion angle41.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG700570324
Dimensions7.24 × 7.66 × 4.65 mm
L/W Ratio1.06
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
7.24 mm7.66 mm1.51 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG700570324
Side View
Table 58.0%Crown 36.8°Girdle: MED-STKPavilion 41.9°Culet: NoneDepth 60.7%

Caratlytics Score

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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 30
Current: $1,240 USD|Low: $204 USD|High: $1,240 USD|Avg: $537 USD
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
November 2, 2026
Retailer 14$204 USD
Retailer 8$236 USD
Retailer 7$238 USD
Retailer 4$252 USD
Retailer 6$264 USD
Retailer 15$340 USD
Retailer 10$420 USD
Retailer 2$464 USD
Retailer 3$494 USD
Retailer 12$564 USD
Retailer 13$583 USD
Retailer 11$652 USD
Retailer 5$811 USD
Retailer 9$1,180 USD
Brilliant Earth$1,240 USD

45 data points across 15 retailers

16 retailers$204 USD to $1,240 USD

A
Cheapest Retailer
-
$204 USD
A
Retailer 2
-
$236 USD
View
A
Retailer 3
-
$238 USD
View
Final sale: no returns
A
Retailer 4
-
$252 USD
View
Retailer 5
-
$264 USD
View
Price last confirmed 8 days ago
B+
Retailer 6
-
$340 USD
View
A
Retailer 7
-
$420 USD
€400 EUR
View
B+
Retailer 8
-
$464 USD
£365 GBP
View
B+
Retailer 9
-
$494 USD
View
B+
Retailer 10
-
$564 USD
A$868 AUD
View
B+
Retailer 11
-
$583 USD
View
Retailer 12
-
$618 USD
View
Price last confirmed 23 days ago
B+
Retailer 13
-
$652 USD
View
B
Retailer 14
-
$811 USD
View
B
Retailer 15
-
$1,180 USD
£929 GBP
View
Most Expensive
B
Brilliant Earth
13883714A · Oct 31
$1,240 USD
View
15 more retailers have this diamond
Prices start from $204 USDSave up to $1,036 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
$204 USD