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Heart|Natural|GIA

1.51ct I SI2 Heart Natural Diamond

EX • I/SI2 • GIA 6552596091

Certificate GIA 6552596091

Diamond specifications and retailer prices

From $5,148 NZD
As of November 6, 2026
Save $6,205 NZD (55%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $11,944 NZD 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 GIA 6552596091. Listed at 13 retailers as of November 4, 2026, with a 121% 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
Colour
SI2
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 6552596091
Dimensions7.07 × 8.05 × 4.73 mm
L/W Ratio1.14
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Cavity, Needle, Indented Natural
Top View
7.07 mm8.05 mm1.51 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6552596091
Side View
Table 60.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 58.8%

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: $5,435 NZD|Low: $5,125 NZD|High: $12,660 NZD|Avg: $7,385 NZD|-10.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 5$5,148 NZD
Retailer 1$5,435 NZD
Retailer 7$6,285 NZD
Retailer 3$6,584 NZD
Retailer 2$7,046 NZD
Retailer 6$7,071 NZD
Retailer 4$11,354 NZD

45 data points across 7 retailers

13 retailers$5,148 NZD to $11,354 NZD

A
Cheapest Retailer
-
$5,148 NZD
A
Retailer 2
-
$5,435 NZD
View
A
Retailer 3
-
$6,285 NZD
View
Final sale: no returns
A
Retailer 4
-
$6,584 NZD
View
Retailer 5
-
$6,855 NZD
View
Price last confirmed 22 days ago
Retailer 6
-
$6,855 NZD
View
Price last confirmed 20 days ago
A
Retailer 7
-
$6,869 NZD
View
A
Retailer 8
-
$7,046 NZD
View
A
Retailer 9
-
$7,071 NZD
View
Retailer 10
-
$7,118 NZD
View
Price last confirmed 22 days ago
Retailer 11
-
$7,910 NZD
View
Price last confirmed 19 days ago
B+
Retailer 12
-
$11,354 NZD
View
Most Expensive
NZ Jewellers
c725a9b8-881d-4e8d-8d4d-ccdb7f702b80 · Oct 18
$11,944 NZD
$6,621 USD
View
Price last confirmed 19 days ago
12 more retailers have this diamond
Prices start from $5,148 NZDSave up to $6,205 NZD

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
$5,148 NZD