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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 $3,393 NZD
As of November 6, 2026
Save $4,503 NZD (57%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $9,424 NZD 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: $4,474 NZD|Low: $3,393 NZD|High: $7,980 NZD|Avg: $4,858 NZD
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$3,393 NZD
Retailer 7$3,525 NZD
Retailer 10$3,951 NZD
Retailer 3$4,160 NZD
Retailer 2$4,232 NZD
Retailer 1$4,474 NZD
Retailer 8$4,710 NZD
Retailer 5$4,741 NZD
Retailer 4$5,044 NZD
Retailer 9$5,502 NZD
Retailer 6$5,616 NZD
Retailer 11$7,896 NZD

32 data points across 12 retailers

20 retailers$3,393 NZD to $7,896 NZD

A
Cheapest Retailer
-
$3,393 NZD
A
Retailer 2
-
$3,525 NZD
View
A
Retailer 3
-
$3,951 NZD
View
B+
Retailer 4
-
$4,160 NZD
View
Final sale: no returns
B+
Retailer 5
-
$4,194 NZD
View
B+
Retailer 6
-
$4,232 NZD
View
B+
Retailer 7
-
$4,474 NZD
View
Retailer 8
-
$4,508 NZD
View
Price last confirmed 40 days ago
B+
Retailer 9
-
$4,636 NZD
View
B+
Retailer 10
-
$4,710 NZD
View
Retailer 11
-
$4,715 NZD
View
Price last confirmed 39 days ago
B+
Retailer 12
-
$4,741 NZD
View
B+
Retailer 13
-
$4,760 NZD
View
Retailer 14
-
$5,044 NZD
View
Price last confirmed 32 days ago
Retailer 15
-
$5,201 NZD
View
Price last confirmed 39 days ago
B+
Retailer 16
-
$5,502 NZD
View
B+
Retailer 17
-
$5,616 NZD
View
B
Retailer 18
-
$7,896 NZD
View
Retailer 19
-
$9,424 NZD
View
Price last confirmed 35 days ago
Most Expensive
NZ Jewellers
6fdbfa8c-9bca-494e-ab38-9a8eada9774d · Sep 28
$9,424 NZD
$5,224 USD
View
Price last confirmed 39 days ago
19 more retailers have this diamond
Prices start from $3,393 NZDSave up to $4,503 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
$3,393 NZD