Round|Natural|GIA

1.20ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 2526662059

Certificate GIA 2526662059

Diamond specifications and retailer prices

From $3,080 AUD
HK$16,900 HKD
As of October 31, 2026
Save $3,838 AUD (55%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: $8,927 AUD 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 October 31, 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: Oct 31
Current: $8,647 AUD|Low: $3,061 AUD|High: $8,647 AUD|Avg: $4,626 AUD
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 12$3,080 AUD
Retailer 3$3,532 AUD
Retailer 8$3,703 AUD
Retailer 14$3,758 AUD
Retailer 7$3,815 AUD
Retailer 16$3,817 AUD
Retailer 15$4,043 AUD
Retailer 6$4,136 AUD
Retailer 9$4,285 AUD
Retailer 4$4,338 AUD
Retailer 10$4,396 AUD
Retailer 17$4,634 AUD
Retailer 5$4,772 AUD
Retailer 13$4,842 AUD
Retailer 11$5,084 AUD
Retailer 2$6,917 AUD
NZ Jewellers$8,647 AUD

37 data points across 17 retailers

21 retailers$3,080 AUD to $6,917 AUD

A
Cheapest Retailer
-
$3,080 AUD
HK$16,900 HKD
Retailer 2
-
$3,532 AUD
$2,481 USD
View
Price last confirmed 14 days ago
B+
Retailer 3
-
$3,703 AUD
$2,601 USD
View
Retailer 4
-
$3,758 AUD
$2,640 USD
View
Price last confirmed 7 days ago
B+
Retailer 5
-
$3,815 AUD
$2,680 USD
View
B+
Retailer 6
-
$3,817 AUD
$2,681 USD
View
Final sale: no returns
B+
Retailer 7
-
$4,043 AUD
$2,840 USD
View
Retailer 8
-
$4,136 AUD
$2,905 USD
View
Price last confirmed 16 days ago
Retailer 9
-
$4,136 AUD
$2,905 USD
View
Price last confirmed 10 days ago
B+
Retailer 10
-
$4,285 AUD
SGD 4,068 SGD
View
Retailer 11
-
$4,295 AUD
$3,017 USD
View
Price last confirmed 17 days ago
B+
Retailer 12
-
$4,338 AUD
$3,047 USD
View
B+
Retailer 13
-
$4,396 AUD
£2,431 GBP
View
Retailer 14
-
$4,634 AUD
View
Price last confirmed 24 days ago
Retailer 15
-
$4,772 AUD
$3,352 USD
View
Price last confirmed 11 days ago
B
Retailer 16
-
$4,842 AUD
€3,239 EUR
View
Retailer 17
-
$4,927 AUD
$3,461 USD
View
Price last confirmed 40 days ago
B
Retailer 18
-
$5,084 AUD
ZAR 57,691 ZAR
View
B
Retailer 19
-
$6,917 AUD
£3,826 GBP
View
Retailer 20
-
$8,647 AUD
$6,074 USD
View
Price last confirmed 12 days ago
Most Expensive
NZ Jewellers
df505308-ff89-4381-967b-67b853d5eaea · Sep 19
$8,927 AUD
$6,271 USD
View
Price last confirmed 43 days ago
20 more retailers have this diamond
Prices start from $3,080 AUDSave up to $3,838 AUD

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
$3,080 AUD