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Round|Natural|GIA

1.20ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 1498706583

Certificate GIA 1498706583

Diamond specifications and retailer prices

From $4,320 NZD
$2,435 USD
As of October 31, 2026
Save $5,243 NZD (55%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $9,563 NZD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1.2ct natural round diamond

This 1.2ct 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 1498706583. Listed at 21 retailers as of October 30, 2026, with prices from $4,320 to $9,563, a $5,243 spread on the same certified stone. NZ Jewellers lists it at $9,563. 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

1.20
Carat
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle35°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 1498706583
Dimensions6.74 × 6.78 × 4.22 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Girdle conditionFaceted
Culet sizeNone
Top View
6.74 mm6.78 mm1.20 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 1498706583
Side View
Table 57.0%Crown 35°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 62.3%

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 31
Current: $6,019 NZD|Low: $3,958 NZD|High: $9,291 NZD|Avg: $5,855 NZD|+2.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 1, 2026
Retailer 9$4,320 NZD
Retailer 6$4,590 NZD
Retailer 5$4,672 NZD
Retailer 8$5,165 NZD
Retailer 2$5,701 NZD
Retailer 7$5,864 NZD
Retailer 1$6,019 NZD
Retailer 3$6,747 NZD
Retailer 4$9,230 NZD

41 data points across 9 retailers

21 retailers$4,320 NZD to $9,563 NZD

B+
Cheapest Retailer
-
$4,320 NZD
$2,435 USD
B+
Retailer 2
-
$4,326 NZD
$2,438 USD
View
B+
Retailer 3
-
$4,453 NZD
$2,510 USD
View
B+
Retailer 4
-
$4,590 NZD
$2,587 USD
View
Final sale: no returns
B+
Retailer 5
-
$4,672 NZD
$2,633 USD
View
B+
Retailer 6
-
$4,879 NZD
$2,750 USD
View
B+
Retailer 7
-
$4,973 NZD
$2,803 USD
View
B+
Retailer 8
-
$4,973 NZD
$2,803 USD
View
B
Retailer 9
-
$5,031 NZD
$2,835 USD
View
B
Retailer 10
-
$5,165 NZD
$2,911 USD
View
B
Retailer 11
-
$5,589 NZD
$3,150 USD
View
B
Retailer 12
-
$5,589 NZD
$3,150 USD
View
B+
Retailer 13
-
$5,701 NZD
£2,530 GBP
View
B
Retailer 14
-
$5,735 NZD
$3,232 USD
View
B
Retailer 15
-
$5,738 NZD
$3,234 USD
View
B
Retailer 16
-
$5,766 NZD
$3,250 USD
View
Retailer 17
-
$5,864 NZD
A$5,085 AUD
View
Price last confirmed 25 days ago
B
Retailer 18
-
$6,019 NZD
€3,231 EUR
View
B
Retailer 19
-
$6,747 NZD
ZAR 61,436 ZAR
View
B
Retailer 20
-
$9,230 NZD
£4,096 GBP
View
Most Expensive
B
NZ Jewellers
39fc103d-9290-4738-bcea-93388e39eadb · Oct 30
$9,563 NZD
$5,390 USD
View
20 more retailers have this diamond
Prices start from $4,320 NZDSave up to $5,243 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+
1.20ct Round
$4,320 NZD