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Heart|Natural|HRD

1.51ct I SI2 Heart Natural Diamond

ID • I/SI2 • HRD 250000232695

Certificate HRD 250000232695

Diamond specifications and retailer prices

From $1,849 USD
As of November 6, 2026
Save $2,020 USD (52%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $4,629 USD at NZ Jewellers · As of October 18, 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 SI2 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by HRD 250000232695. Listed at 10 retailers as of November 4, 2026, with a 109% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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
I
Color
SI2
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabHRD
CertificateHRD 250000232695
Dimensions6.82 × 7.84 × 4.76 mm
L/W Ratio1.15
Girdle conditionFaceted
Culet sizeNone
Top View
6.82 mm7.84 mm1.51 ctI / SI2
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateHRD 250000232695
Side View
Table 61.0%CrownGirdle: ThickPavilionCulet: NoneDepth 60.7%

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: $1,849 USD|Low: $1,849 USD|High: $4,339 USD|Avg: $2,520 USD|-9.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 1$1,849 USD
Retailer 2$1,971 USD
Retailer 4$2,214 USD
Retailer 6$2,300 USD
Retailer 5$2,353 USD
Retailer 7$2,372 USD
Retailer 3$3,869 USD

39 data points across 7 retailers

10 retailers$1,849 USD to $3,869 USD

A
Cheapest Retailer
-
$1,849 USD
A
Retailer 2
-
$1,971 USD
View
Retailer 3
-
$2,214 USD
View
Price last confirmed 21 days ago
Retailer 4
-
$2,214 USD
View
Price last confirmed 19 days ago
A
Retailer 5
-
$2,300 USD
View
Retailer 6
-
$2,317 USD
View
Price last confirmed 21 days ago
A
Retailer 7
-
$2,353 USD
View
Retailer 8
-
$2,555 USD
View
Price last confirmed 18 days ago
A
Retailer 9
-
$3,869 USD
View
Most Expensive
NZ Jewellers
91bd041a-2a38-45e3-9e9d-5804e58b07f8 · Oct 18
$4,629 USD
View
Price last confirmed 19 days ago
9 more retailers have this diamond
Prices start from $1,849 USDSave up to $2,020 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
$1,849 USD