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Round|Natural|GIA

1.20ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 1553140319

Certificate GIA 1553140319

Diamond specifications and retailer prices

From $1,843 USD
As of November 6, 2026
Save $2,400 USD (57%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $5,129 USD at NZ Jewellers · As of October 3, 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 1553140319. Listed at 20 retailers as of November 4, 2026, with a 130% 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
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 1553140319
Dimensions6.81 × 6.87 × 4.12 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Feather, Crystal, Cloud, Cavity, Needle
Top View
6.81 mm6.87 mm1.20 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1553140319
Side View
Table 62.0%Crown 33°Girdle: Slightly ThickPavilion 41°Culet: NoneDepth 60.2%

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: $1,918 USD|Low: $1,843 USD|High: $4,349 USD|Avg: $2,704 USD|-3.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
November 6, 2026
Retailer 12$1,843 USD
Retailer 1$1,918 USD
Retailer 10$2,149 USD
Retailer 2$2,240 USD
Retailer 13$2,287 USD
Retailer 4$2,500 USD
Retailer 7$2,554 USD
Retailer 6$2,563 USD
Retailer 3$2,568 USD
Retailer 9$2,963 USD
Retailer 8$3,014 USD
Retailer 5$3,020 USD
Retailer 11$4,243 USD

32 data points across 13 retailers

20 retailers$1,843 USD to $4,243 USD

A
Cheapest Retailer
-
$1,843 USD
A
Retailer 2
-
$1,918 USD
View
A
Retailer 3
-
$2,149 USD
View
B+
Retailer 4
-
$2,240 USD
View
Final sale: no returns
B+
Retailer 5
-
$2,287 USD
View
B+
Retailer 6
-
$2,301 USD
View
B+
Retailer 7
-
$2,305 USD
View
Retailer 8
-
$2,453 USD
View
Price last confirmed 39 days ago
B+
Retailer 9
-
$2,500 USD
View
B+
Retailer 10
-
$2,554 USD
View
B+
Retailer 11
-
$2,563 USD
View
Retailer 12
-
$2,566 USD
View
Price last confirmed 38 days ago
B+
Retailer 13
-
$2,568 USD
View
Retailer 14
-
$2,831 USD
View
Price last confirmed 38 days ago
B+
Retailer 15
-
$2,963 USD
View
B+
Retailer 16
-
$3,014 USD
View
Retailer 17
-
$3,020 USD
View
Price last confirmed 30 days ago
B
Retailer 18
-
$4,243 USD
View
Retailer 19
-
$5,129 USD
View
Price last confirmed 39 days ago
Most Expensive
NZ Jewellers
8682ebd1-3440-4309-9dfb-944ef4ce9066 · Oct 3
$5,129 USD
View
Price last confirmed 34 days ago
19 more retailers have this diamond
Prices start from $1,843 USDSave up to $2,400 USD

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
$1,843 USD