Heart|Natural|IGI

1.51ct I SI1 Heart Natural Diamond

VG • I/SI1 • IGI 790611321

Shape and cutting style on the report: Heart brilliant

Certificate IGI 790611321

Diamond specifications and retailer prices

From $2,423 USD
As of November 6, 2026
Save $3,186 USD (57%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: $5,609 USD at NZ Jewellers · As of November 3, 2026
View at NZ Jewellers

About this 1.51ct natural heart diamond

This 1.51ct natural heart sits in the one-and-a-half to two carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI 790611321. Listed at 16 retailers as of November 3, 2026, with prices from $2,423 to $5,609, a $3,186 spread on the same certified stone. NZ Jewellers lists it at $5,609. 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
I
Color
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceStrong
Crown angle40.6°
Pavilion angle36.7°
OriginNatural
Grading LabIGI
CertificateIGI 790611321
Dimensions8.01 × 7.17 × 4.45 mm
L/W Ratio1.12
Girdle conditionFaceted
Top View
8.01 mm7.17 mm1.51 ctI / SI1
OriginNatural
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceStrong
CertificateIGI 790611321
Side View
Table 60.0%Crown 40.6°Girdle: THN-STKPavilion 36.7°Culet: NoneDepth 55.6%

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: Nov 6
Current: $5,609 USD|Low: $2,423 USD|High: $5,692 USD|Avg: $3,641 USD|-1.5%
NZ Jewellers
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
November 6, 2026
Retailer 8$2,423 USD
Retailer 11$2,783 USD
Retailer 2$2,939 USD
Retailer 5$2,980 USD
Retailer 12$3,052 USD
Retailer 14$3,105 USD
Retailer 9$3,116 USD
Retailer 3$3,219 USD
Retailer 6$3,233 USD
Retailer 4$3,345 USD
Retailer 10$3,924 USD
Retailer 7$4,723 USD
Retailer 13$5,361 USD
NZ Jewellers$5,609 USD

21 data points across 14 retailers

16 retailers$2,423 USD to $5,609 USD

A
Cheapest Retailer
-
$2,423 USD
A
Retailer 2
-
$2,783 USD
View
B+
Retailer 3
-
$2,939 USD
View
B+
Retailer 4
-
$2,980 USD
View
A
Retailer 5
-
$3,052 USD
View
B+
Retailer 6
-
$3,105 USD
View
A
Retailer 7
-
$3,116 USD
View
B+
Retailer 8
-
$3,202 USD
View
Final sale: no returns
A
Retailer 9
-
$3,219 USD
View
Retailer 10
-
$3,233 USD
View
Price last confirmed 8 days ago
B+
Retailer 11
-
$3,281 USD
View
B+
Retailer 12
-
$3,345 USD
View
B+
Retailer 13
-
$3,924 USD
View
B+
Retailer 14
-
$4,723 USD
View
B
Retailer 15
-
$5,361 USD
View
Most Expensive
B
NZ Jewellers
bd3e929c-69a8-4605-b02c-91a5173c0542 · Nov 3
$5,609 USD
View
15 more retailers have this diamond
Prices start from $2,423 USDSave up to $3,186 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
$2,423 USD