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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 €1,685 EUR
As of November 6, 2026
Save €2,236 EUR (57%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: €4,679 EUR 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: €2,221 EUR|Low: €1,685 EUR|High: €3,962 EUR|Avg: €2,412 EUR
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€1,685 EUR
Retailer 7€1,750 EUR
Retailer 10€1,961 EUR
Retailer 3€2,065 EUR
Retailer 2€2,101 EUR
Retailer 1€2,221 EUR
Retailer 8€2,339 EUR
Retailer 5€2,354 EUR
Retailer 4€2,504 EUR
Retailer 9€2,732 EUR
Retailer 6€2,788 EUR
Retailer 11€3,920 EUR

32 data points across 12 retailers

20 retailers€1,685 EUR to €3,920 EUR

A
Cheapest Retailer
-
€1,685 EUR
A
Retailer 2
-
€1,750 EUR
View
A
Retailer 3
-
€1,961 EUR
View
B+
Retailer 4
-
€2,065 EUR
View
Final sale: no returns
B+
Retailer 5
-
€2,082 EUR
View
B+
Retailer 6
-
€2,101 EUR
View
B+
Retailer 7
-
€2,221 EUR
View
Retailer 8
-
€2,238 EUR
View
Price last confirmed 40 days ago
B+
Retailer 9
-
€2,302 EUR
View
B+
Retailer 10
-
€2,339 EUR
View
Retailer 11
-
€2,341 EUR
View
Price last confirmed 39 days ago
B+
Retailer 12
-
€2,354 EUR
View
B+
Retailer 13
-
€2,364 EUR
View
Retailer 14
-
€2,504 EUR
View
Price last confirmed 32 days ago
Retailer 15
-
€2,582 EUR
View
Price last confirmed 39 days ago
B+
Retailer 16
-
€2,732 EUR
View
B+
Retailer 17
-
€2,788 EUR
View
B
Retailer 18
-
€3,920 EUR
View
Retailer 19
-
€4,679 EUR
View
Price last confirmed 35 days ago
Most Expensive
NZ Jewellers
6fdbfa8c-9bca-494e-ab38-9a8eada9774d · Sep 28
€4,679 EUR
$5,224 USD
View
Price last confirmed 39 days ago
19 more retailers have this diamond
Prices start from €1,685 EURSave up to €2,236 EUR

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
€1,685 EUR