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Heart|Natural|GIA

1.51ct I SI2 Heart Natural Diamond

EX • I/SI2 • GIA 2558582288

Certificate GIA 2558582288

Diamond specifications and retailer prices

From $5,404 NZD
As of November 6, 2026
Save $6,615 NZD (55%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: $13,650 NZD at NZ Jewellers · As of September 25, 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 2558582288. Listed at 13 retailers as of November 2, 2026, with a 122% 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 2558582288
Dimensions7.02 × 7.80 × 4.64 mm
L/W Ratio1.11
Girdle conditionFaceted
Top View
7.02 mm7.80 mm1.51 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2558582288
Side View
Table 58.0%CrownGirdle: MED-THKPavilionCulet: NoneDepth 59.4%

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: $8,087 NZD|Low: $5,334 NZD|High: $12,923 NZD|Avg: $7,647 NZD|-5.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 11$5,404 NZD
Retailer 8$5,426 NZD
Retailer 5$5,801 NZD
Retailer 2$5,812 NZD
Retailer 10$6,009 NZD
Retailer 7$6,819 NZD
Retailer 4$7,279 NZD
Retailer 1$8,087 NZD
Retailer 9$9,669 NZD
Retailer 3$11,217 NZD
Retailer 6$12,019 NZD

34 data points across 11 retailers

13 retailers$5,404 NZD to $12,019 NZD

A
Cheapest Retailer
-
$5,404 NZD
A
Retailer 2
-
$5,426 NZD
View
A
Retailer 3
-
$5,801 NZD
View
A
Retailer 4
-
$5,812 NZD
View
A
Retailer 5
-
$6,009 NZD
View
Final sale: no returns
A
Retailer 6
-
$6,819 NZD
View
A
Retailer 7
-
$7,279 NZD
View
B+
Retailer 8
-
$7,795 NZD
View
B+
Retailer 9
-
$8,087 NZD
View
B+
Retailer 10
-
$9,669 NZD
View
B+
Retailer 11
-
$11,217 NZD
View
B
Retailer 12
-
$12,019 NZD
View
Most Expensive
NZ Jewellers
79b6de24-c94c-44b2-a0a4-19c056c56763 · Sep 25
$13,650 NZD
$7,567 USD
View
Price last confirmed 42 days ago
12 more retailers have this diamond
Prices start from $5,404 NZDSave up to $6,615 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
$5,404 NZD