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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 $1,881 USD
As of November 6, 2026
Save $2,496 USD (57%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $5,224 USD 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
Color
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: $1,954 USD|Low: $1,881 USD|High: $4,424 USD|Avg: $2,697 USD|-2.9%
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 6, 2026
Retailer 11$1,881 USD
Retailer 1$1,954 USD
Retailer 8$2,190 USD
Retailer 3$2,306 USD
Retailer 12$2,325 USD
Retailer 2$2,346 USD
Retailer 5$2,611 USD
Retailer 6$2,628 USD
Retailer 4$2,796 USD
Retailer 7$3,050 USD
Retailer 9$3,110 USD
Retailer 10$4,377 USD

32 data points across 12 retailers

20 retailers$1,881 USD to $4,377 USD

A
Cheapest Retailer
-
$1,881 USD
A
Retailer 2
-
$1,954 USD
View
A
Retailer 3
-
$2,190 USD
View
B+
Retailer 4
-
$2,306 USD
View
Final sale: no returns
B+
Retailer 5
-
$2,325 USD
View
B+
Retailer 6
-
$2,325 USD
View
B+
Retailer 7
-
$2,346 USD
View
Retailer 8
-
$2,499 USD
View
Price last confirmed 39 days ago
B+
Retailer 9
-
$2,570 USD
View
B+
Retailer 10
-
$2,611 USD
View
Retailer 11
-
$2,614 USD
View
Price last confirmed 38 days ago
B+
Retailer 12
-
$2,628 USD
View
B+
Retailer 13
-
$2,639 USD
View
Retailer 14
-
$2,796 USD
View
Price last confirmed 31 days ago
Retailer 15
-
$2,883 USD
View
Price last confirmed 38 days ago
B+
Retailer 16
-
$3,050 USD
View
B+
Retailer 17
-
$3,110 USD
View
B
Retailer 18
-
$4,377 USD
View
Retailer 19
-
$5,224 USD
View
Price last confirmed 34 days ago
Most Expensive
NZ Jewellers
6fdbfa8c-9bca-494e-ab38-9a8eada9774d · Sep 28
$5,224 USD
View
Price last confirmed 39 days ago
19 more retailers have this diamond
Prices start from $1,881 USDSave up to $2,496 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
$1,881 USD