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Heart|Natural|GIA

1.31ct I SI1 Heart Natural Diamond

EX • I/SI1 • GIA 6531769899

Certificate GIA 6531769899

Diamond specifications and retailer prices

From $4,120 NZD
As of November 6, 2026
Save $5,509 NZD (57%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $11,327 NZD at NZ Jewellers · As of September 25, 2026
View at NZ Jewellers

About this 1.31ct natural heart diamond

This 1.31ct natural heart sits in the one-and-a-quarter to one-and-a-half 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 6531769899. Listed at 20 retailers as of November 5, 2026, with a 134% 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

1.31
Carat
I
Colour
SI1
Clarity
Excellent
Cut (retailer stated)

Specifications

Cut (retailer stated)Excellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle39.07°
Pavilion angle38.95°
OriginNatural
Grading LabGIA
CertificateGIA 6531769899
Dimensions6.66 × 7.59 × 4.49 mm
L/W Ratio1.14
Top View
6.66 mm7.59 mm1.31 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 6531769899
Side View
Table 60.0%Crown 39.07°Girdle: MED-THKPavilion 38.95°Culet: NoneDepth 59.1%

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: $9,629 NZD|Low: $4,120 NZD|High: $11,327 NZD|Avg: $5,995 NZD
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
Retailer 15
Retailer 16
November 7, 2026
Retailer 10$4,120 NZD
Retailer 5$4,719 NZD
Retailer 15$4,950 NZD
Retailer 14$5,100 NZD
Retailer 13$5,376 NZD
Retailer 7$5,417 NZD
Retailer 16$5,527 NZD
Retailer 9$5,713 NZD
Retailer 4$5,740 NZD
Retailer 12$5,783 NZD
Retailer 8$5,787 NZD
Retailer 3$6,220 NZD
Retailer 6$6,377 NZD
Retailer 11$6,747 NZD
Retailer 2$9,193 NZD
NZ Jewellers$9,629 NZD

33 data points across 16 retailers

20 retailers$4,120 NZD to $9,629 NZD

A
Cheapest Retailer
-
$4,120 NZD
A
Retailer 2
-
$4,719 NZD
View
A
Retailer 3
-
$4,950 NZD
View
A
Retailer 4
-
$5,017 NZD
View
A
Retailer 5
-
$5,100 NZD
View
Final sale: no returns
B+
Retailer 6
-
$5,376 NZD
View
Retailer 7
-
$5,417 NZD
View
Price last confirmed 46 days ago
Retailer 8
-
$5,417 NZD
View
Price last confirmed 9 days ago
A
Retailer 9
-
$5,527 NZD
View
B+
Retailer 10
-
$5,713 NZD
View
B+
Retailer 11
-
$5,740 NZD
View
B+
Retailer 12
-
$5,783 NZD
View
Retailer 13
-
$5,787 NZD
View
Price last confirmed 31 days ago
B+
Retailer 14
-
$6,220 NZD
View
Retailer 15
-
$6,251 NZD
View
Price last confirmed 44 days ago
B+
Retailer 16
-
$6,377 NZD
View
B+
Retailer 17
-
$6,747 NZD
View
B
Retailer 18
-
$9,193 NZD
View
B
Retailer 19
-
$9,629 NZD
View
Most Expensive
NZ Jewellers
95c02344-1a40-4209-bdc5-fe4540743353 · Sep 25
$11,327 NZD
$6,279 USD
View
Price last confirmed 42 days ago
19 more retailers have this diamond
Prices start from $4,120 NZDSave up to $5,509 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
1.31ct Heart
$4,120 NZD