Round|Natural|GIA

1.20ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 2526662059

Certificate GIA 2526662059

Diamond specifications and retailer prices

From $3,838 NZD
HK$16,900 HKD
As of November 1, 2026
Save $4,783 NZD (55%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $11,127 NZD at NZ Jewellers · As of September 19, 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 2526662059. Listed at 21 retailers as of November 1, 2026, with a 125% 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

1.20
Carat
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 2526662059
Dimensions6.78 × 6.74 × 4.24 mm
L/W Ratio1.01
Star length50%
Lower girdle75%
Top View
6.78 mm6.74 mm1.20 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2526662059
Side View
Table 58.0%Crown 35°Girdle: STK-STKPavilion 41.4°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 1
Current: $10,777 NZD|Low: $3,815 NZD|High: $10,777 NZD|Avg: $5,765 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
Retailer 17
November 1, 2026
Retailer 13$3,838 NZD
Retailer 3$4,402 NZD
Retailer 8$4,615 NZD
Retailer 14$4,684 NZD
Retailer 7$4,755 NZD
Retailer 16$4,757 NZD
Retailer 15$5,039 NZD
Retailer 6$5,154 NZD
Retailer 9$5,341 NZD
Retailer 4$5,407 NZD
Retailer 11$5,478 NZD
Retailer 17$5,776 NZD
Retailer 5$5,947 NZD
Retailer 2$6,008 NZD
Retailer 12$6,336 NZD
Retailer 10$8,621 NZD
NZ Jewellers$10,777 NZD

37 data points across 17 retailers

21 retailers$3,838 NZD to $8,621 NZD

A
Cheapest Retailer
-
$3,838 NZD
HK$16,900 HKD
Retailer 2
-
$4,402 NZD
$2,481 USD
View
Price last confirmed 14 days ago
B+
Retailer 3
-
$4,615 NZD
$2,601 USD
View
Retailer 4
-
$4,684 NZD
$2,640 USD
View
B+
Retailer 5
-
$4,755 NZD
$2,680 USD
View
B+
Retailer 6
-
$4,757 NZD
$2,681 USD
View
Final sale: no returns
B+
Retailer 7
-
$5,039 NZD
$2,840 USD
View
Retailer 8
-
$5,154 NZD
$2,905 USD
View
Price last confirmed 16 days ago
Retailer 9
-
$5,154 NZD
$2,905 USD
View
Price last confirmed 10 days ago
B+
Retailer 10
-
$5,341 NZD
SGD 4,068 SGD
View
Retailer 11
-
$5,353 NZD
$3,017 USD
View
Price last confirmed 17 days ago
B+
Retailer 12
-
$5,407 NZD
$3,047 USD
View
B+
Retailer 13
-
$5,478 NZD
£2,431 GBP
View
Retailer 14
-
$5,776 NZD
A$5,008 AUD
View
Price last confirmed 25 days ago
Retailer 15
-
$5,947 NZD
$3,352 USD
View
Price last confirmed 11 days ago
B+
Retailer 16
-
$6,008 NZD
€3,225 EUR
View
Retailer 17
-
$6,141 NZD
$3,461 USD
View
Price last confirmed 40 days ago
B
Retailer 18
-
$6,336 NZD
ZAR 57,691 ZAR
View
B
Retailer 19
-
$8,621 NZD
£3,826 GBP
View
Retailer 20
-
$10,777 NZD
$6,074 USD
View
Price last confirmed 12 days ago
Most Expensive
NZ Jewellers
df505308-ff89-4381-967b-67b853d5eaea · Sep 19
$11,127 NZD
$6,271 USD
View
Price last confirmed 43 days ago
20 more retailers have this diamond
Prices start from $3,838 NZDSave up to $4,783 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
1.20ct Round
$3,838 NZD