Heart|Lab Grown|IGI

1.51ct D IF Heart Lab Grown Diamond

VG • D/IF • IGI LG816615642

Shape and cutting style on the report: Heart brilliant

Certificate IGI LG816615642

Diamond specifications and retailer prices

From $286 USD
As of October 30, 2026
Save $2,454 USD (90%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $2,740 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 IF clarity (flawless or internally-flawless), with a very-good cut grade and certified by IGI LG816615642 or 816615642. Listed at 15 retailers as of October 30, 2026, with prices from $286 to $2,740, a $2,454 spread on the same certified stone. Brilliant Earth lists it at $2,740. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.51
Carat
D
Color
IF
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.3°
Pavilion angle38°
OriginLab Grown
Grading LabIGI
CertificateIGI LG816615642
Dimensions8.00 × 7.06 × 4.63 mm
L/W Ratio1.13
Girdle conditionFaceted
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
8.00 mm7.06 mm1.51 ctD / IF
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG816615642
Side View
Table 56.0%Crown 35.3°Girdle: STK-THKPavilion 38°Culet: NoneDepth 57.9%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 30
Current: $2,740 USD|Low: $286 USD|High: $3,340 USD|Avg: $1,071 USD|-13.8%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
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Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
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Retailer 17
Retailer 18
Retailer 19
November 1, 2026
Retailer 7$286 USD
Retailer 3$323 USD
Retailer 18$331 USD
Retailer 12$413 USD
Retailer 19$444 USD
Retailer 17$477 USD
Retailer 15$480 USD
Retailer 16$615 USD
Retailer 10$712 USD
Retailer 9$750 USD
Retailer 14$911 USD
Retailer 13$964 USD
Retailer 8$1,026 USD
Retailer 5$1,257 USD
Retailer 6$1,385 USD
Retailer 11$1,426 USD
Retailer 2$1,566 USD
Retailer 4$2,540 USD
Brilliant Earth$2,740 USD

23 data points across 19 retailers

15 retailers$286 USD to $2,740 USD

A
Cheapest Retailer
-
$286 USD
A
Retailer 2
-
$323 USD
View
Final sale: no returns
A
Retailer 3
-
$331 USD
View
A
Retailer 4
-
$413 USD
£325 GBP
View
A
Retailer 5
-
$444 USD
View
A
Retailer 6
-
$477 USD
View
A
Retailer 7
-
$480 USD
View
A
Retailer 8
-
$615 USD
View
A
Retailer 9
-
$911 USD
A$1,402 AUD
View
A
Retailer 10
-
$964 USD
View
B+
Retailer 11
-
$1,257 USD
View
B+
Retailer 12
-
$1,385 USD
View
B+
Retailer 13
-
$1,566 USD
£1,233 GBP
View
B
Retailer 14
-
$2,540 USD
View
Most Expensive
B
Brilliant Earth
21730607Y · Oct 31
$2,740 USD
View
14 more retailers have this diamond
Prices start from $286 USDSave up to $2,454 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
$286 USD