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Round|Natural|GIA

1.31ct J SI2 Round Natural Diamond

EX • J/SI2 • GIA 1509706158

Certificate GIA 1509706158

Diamond specifications and retailer prices

From $4,553 NZD
$2,566 USD
As of October 30, 2026
Save $5,759 NZD (56%) vs most expensive(unlock to see where)
6 retailers carry this diamond
Most expensive: $10,312 NZD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1.31ct natural round diamond

This 1.31ct natural round sits in the one-and-a-quarter to one-and-a-half carat band, graded J colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1509706158. Listed at 6 retailers as of October 30, 2026, with prices from $4,553 to $10,312, a $5,759 spread on the same certified stone. NZ Jewellers lists it at $10,312. 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
J
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 1509706158
Dimensions6.95 × 6.97 × 4.38 mm
L/W Ratio1.00
Star length50%
Lower girdle80%
Key to symbols
Crystal, Cloud, Feather, Needle, Natural
Top View
6.95 mm6.97 mm1.31 ctJ / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1509706158
Side View
Table 57.0%Crown 35°Girdle: STK-STKPavilion 41.4°Culet: NoneDepth 62.9%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: $10,312 NZD|Low: $3,588 NZD|High: $10,312 NZD|Avg: $6,556 NZD
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 31, 2026
Retailer 5$4,553 NZD
Retailer 6$4,778 NZD
Retailer 4$5,769 NZD
Retailer 2$5,844 NZD
Retailer 3$8,687 NZD
NZ Jewellers$10,312 NZD

22 data points across 6 retailers

6 retailers$4,553 NZD to $10,312 NZD

B+
Cheapest Retailer
-
$4,553 NZD
$2,566 USD
Final sale: no returns
B+
Retailer 2
-
$4,778 NZD
$2,693 USD
View
B+
Retailer 3
-
$5,769 NZD
£2,560 GBP
View
B+
Retailer 4
-
$5,844 NZD
€3,137 EUR
View
B
Retailer 5
-
$8,687 NZD
£3,855 GBP
View
Most Expensive
B
NZ Jewellers
7f980604-1349-482d-a690-de393ed8d8e9 · Oct 30
$10,312 NZD
$5,812 USD
View
5 more retailers have this diamond
Prices start from $4,553 NZDSave up to $5,759 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.

B+
1.31ct Round
$4,553 NZD