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Heart|Natural|GIA

1.51ct I SI1 Heart Natural Diamond

ID • I/SI1 • GIA 1535629313

Certificate GIA 1535629313

Diamond specifications and retailer prices

From $6,279 NZD
As of November 6, 2026
Save $6,763 NZD (52%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: $14,548 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 SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 1535629313. Listed at 19 retailers as of November 4, 2026, with a 108% 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
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
CertificateGIA 1535629313
Dimensions7.99 × 7.02 × 4.65 mm
L/W Ratio1.14
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Cloud, Feather, Needle
Top View
7.99 mm7.02 mm1.51 ctI / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1535629313
Side View
Table 58.0%CrownGirdle: STK-THKPavilionCulet: NoneDepth 58.2%

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: $6,669 NZD|Low: $6,256 NZD|High: $13,461 NZD|Avg: $8,441 NZD|-3.4%
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 10$6,279 NZD
Retailer 1$6,669 NZD
Retailer 7$7,484 NZD
Retailer 2$7,578 NZD
Retailer 4$7,982 NZD
Retailer 5$8,316 NZD
Retailer 9$8,424 NZD
Retailer 3$8,473 NZD
Retailer 11$8,480 NZD
Retailer 6$10,017 NZD
Retailer 8$13,042 NZD

33 data points across 11 retailers

19 retailers$6,279 NZD to $13,042 NZD

A
Cheapest Retailer
-
$6,279 NZD
A
Retailer 2
-
$6,669 NZD
View
A
Retailer 3
-
$7,484 NZD
View
A
Retailer 4
-
$7,578 NZD
View
Final sale: no returns
B+
Retailer 5
-
$7,741 NZD
View
B+
Retailer 6
-
$7,748 NZD
View
B+
Retailer 7
-
$7,982 NZD
View
B+
Retailer 8
-
$8,193 NZD
View
B+
Retailer 9
-
$8,316 NZD
View
Retailer 10
-
$8,350 NZD
View
Price last confirmed 22 days ago
Retailer 11
-
$8,350 NZD
View
Price last confirmed 22 days ago
Retailer 12
-
$8,350 NZD
View
Price last confirmed 20 days ago
B+
Retailer 13
-
$8,424 NZD
View
Retailer 14
-
$8,473 NZD
View
Price last confirmed 29 days ago
B+
Retailer 15
-
$8,480 NZD
View
Retailer 16
-
$9,636 NZD
View
Price last confirmed 19 days ago
B+
Retailer 17
-
$10,017 NZD
View
B
Retailer 18
-
$13,042 NZD
View
Most Expensive
NZ Jewellers
a8878e84-ef46-4992-b67a-8eceeb60932b · Oct 18
$14,548 NZD
$8,065 USD
View
Price last confirmed 19 days ago
18 more retailers have this diamond
Prices start from $6,279 NZDSave up to $6,763 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
$6,279 NZD