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Round|Natural|GIA

1.00ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 2506134651

Shape and cutting style on the report: Round brilliant

Certificate GIA 2506134651

Diamond specifications and retailer prices

From $3,310 NZD
As of November 6, 2026
Save $6,278 NZD (65%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $9,588 NZD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1ct natural round diamond

This 1ct natural round sits in the classic one-carat band, graded J colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2506134651. Listed at 21 retailers as of November 5, 2026, with prices from $3,310 to $9,588, a $6,278 spread on the same certified stone. NZ Jewellers lists it at $9,588. 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

1.00
Carat
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle35.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 2506134651
Dimensions6.39 × 6.35 × 3.99 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Top View
6.39 mm6.35 mm1.00 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2506134651
Side View
Table 57.0%Crown 35.5°Girdle: MED-STKPavilion 41°Culet: NoneDepth 62.7%

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: $3,310 NZD|Low: $3,310 NZD|High: $8,130 NZD|Avg: $4,903 NZD|-3.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 1$3,310 NZD
Retailer 7$3,370 NZD
Retailer 8$4,144 NZD
Retailer 9$4,232 NZD
Retailer 2$4,328 NZD
Retailer 3$4,824 NZD
Retailer 6$5,184 NZD
Retailer 4$5,598 NZD
Retailer 5$8,013 NZD

29 data points across 9 retailers

21 retailers$3,310 NZD to $9,588 NZD

A
Cheapest Retailer
-
$3,310 NZD
B+
Retailer 2
-
$3,370 NZD
View
B+
Retailer 3
-
$4,014 NZD
View
B+
Retailer 4
-
$4,021 NZD
View
B+
Retailer 5
-
$4,144 NZD
View
Retailer 6
-
$4,180 NZD
View
Price last confirmed 82 days ago
B
Retailer 7
-
$4,232 NZD
View
Final sale: no returns
B+
Retailer 8
-
$4,328 NZD
View
B+
Retailer 9
-
$4,546 NZD
View
B+
Retailer 10
-
$4,586 NZD
View
B
Retailer 11
-
$4,672 NZD
View
B
Retailer 12
-
$4,798 NZD
View
B+
Retailer 13
-
$4,824 NZD
View
B
Retailer 14
-
$4,838 NZD
View
Retailer 15
-
$5,138 NZD
View
Price last confirmed 30 days ago
B
Retailer 16
-
$5,184 NZD
View
B
Retailer 17
-
$5,291 NZD
View
B
Retailer 18
-
$5,598 NZD
View
B
Retailer 19
-
$6,283 NZD
View
B
Retailer 20
-
$8,013 NZD
View
Most Expensive
B
NZ Jewellers
8b7bb6df-972d-41c2-b5d1-2a135753b617 · Nov 5
$9,588 NZD
$5,315 USD
View
20 more retailers have this diamond
Prices start from $3,310 NZDSave up to $6,278 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
1.00ct Round
$3,310 NZD