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Round|Natural|GIA

1.20ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 5556715240

Certificate GIA 5556715240

Diamond specifications and retailer prices

From $2,738 AUD
As of November 6, 2026
Save $3,633 AUD (57%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $7,603 AUD at NZ Jewellers · As of September 28, 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 5556715240. Listed at 20 retailers as of November 2, 2026, with a 133% 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 angle34°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 5556715240
Dimensions6.85 × 6.88 × 4.16 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Needle
Top View
6.85 mm6.88 mm1.20 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 5556715240
Side View
Table 61.0%Crown 34°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 60.6%

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: $3,609 AUD|Low: $2,738 AUD|High: $6,439 AUD|Avg: $3,919 AUD
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 7, 2026
Retailer 12$2,738 AUD
Retailer 7$2,844 AUD
Retailer 10$3,187 AUD
Retailer 3$3,356 AUD
Retailer 2$3,414 AUD
Retailer 1$3,609 AUD
Retailer 8$3,800 AUD
Retailer 5$3,825 AUD
Retailer 4$4,069 AUD
Retailer 9$4,439 AUD
Retailer 6$4,531 AUD
Retailer 11$6,370 AUD

32 data points across 12 retailers

20 retailers$2,738 AUD to $6,370 AUD

A
Cheapest Retailer
-
$2,738 AUD
A
Retailer 2
-
$2,844 AUD
View
A
Retailer 3
-
$3,187 AUD
View
B+
Retailer 4
-
$3,356 AUD
View
Final sale: no returns
B+
Retailer 5
-
$3,384 AUD
View
B+
Retailer 6
-
$3,414 AUD
View
B+
Retailer 7
-
$3,609 AUD
View
Retailer 8
-
$3,637 AUD
View
Price last confirmed 40 days ago
B+
Retailer 9
-
$3,740 AUD
View
B+
Retailer 10
-
$3,800 AUD
View
Retailer 11
-
$3,804 AUD
View
Price last confirmed 39 days ago
B+
Retailer 12
-
$3,825 AUD
View
B+
Retailer 13
-
$3,841 AUD
View
Retailer 14
-
$4,069 AUD
View
Price last confirmed 32 days ago
Retailer 15
-
$4,196 AUD
View
Price last confirmed 39 days ago
B+
Retailer 16
-
$4,439 AUD
View
B+
Retailer 17
-
$4,531 AUD
View
B
Retailer 18
-
$6,370 AUD
View
Retailer 19
-
$7,603 AUD
View
Price last confirmed 35 days ago
Most Expensive
NZ Jewellers
6fdbfa8c-9bca-494e-ab38-9a8eada9774d · Sep 28
$7,603 AUD
$5,224 USD
View
Price last confirmed 39 days ago
19 more retailers have this diamond
Prices start from $2,738 AUDSave up to $3,633 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
$2,738 AUD