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1.03ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 2566647312

Certificate GIA 2566647312

Diamond specifications and retailer prices

From €1,680 EUR
As of November 6, 2026
Save €1,365 EUR (45%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: €3,045 EUR at Helzberg Diamonds · As of November 6, 2026
View at Helzberg Diamonds

About this 1.03ct natural round diamond

This 1.03ct 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 2566647312. Listed at 15 retailers as of November 6, 2026, with prices from €1,680 to €3,045, a €1,365 spread on the same certified stone. Helzberg Diamonds lists it at €3,045. 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

1.03
Carat
J
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle34°
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 2566647312
Dimensions6.46 × 6.49 × 4.01 mm
L/W Ratio1.00
Culet sizeNone
Top View
6.46 mm6.49 mm1.03 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 2566647312
Side View
Table 58.0%Crown 34°Girdle: MED-STKPavilion 41.4°Culet: NoneDepth 61.9%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 6
Current: €3,045 EUR|Low: €1,680 EUR|High: €3,258 EUR|Avg: €2,211 EUR|-6.5%
Helzberg Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
November 6, 2026
Retailer 6€1,680 EUR
Retailer 2€1,686 EUR
Retailer 14€1,728 EUR
Retailer 5€1,747 EUR
Retailer 13€1,771 EUR
Retailer 10€1,836 EUR
Retailer 7€1,845 EUR
Retailer 4€1,850 EUR
Retailer 15€2,026 EUR
Retailer 8€2,150 EUR
Retailer 3€2,175 EUR
Retailer 12€2,440 EUR
Retailer 11€2,590 EUR
Retailer 9€2,768 EUR
Helzberg Diamonds€3,045 EUR

20 data points across 15 retailers

15 retailers€1,680 EUR to €3,045 EUR

A
Cheapest Retailer
-
€1,680 EUR
A
Retailer 2
-
€1,686 EUR
View
B+
Retailer 3
-
€1,728 EUR
View
B+
Retailer 4
-
€1,747 EUR
View
B+
Retailer 5
-
€1,771 EUR
View
B+
Retailer 6
-
€1,836 EUR
View
B+
Retailer 7
-
€1,845 EUR
View
B+
Retailer 8
-
€1,850 EUR
View
B+
Retailer 9
-
€2,026 EUR
View
B+
Retailer 10
-
€2,150 EUR
View
B+
Retailer 11
-
€2,175 EUR
View
B+
Retailer 12
-
€2,440 EUR
View
B
Retailer 13
-
€2,590 EUR
View
B
Retailer 14
-
€2,768 EUR
View
Most Expensive
B
Helzberg Diamonds
XZRILMMMKNJHI · Nov 6
€3,045 EUR
$3,400 USD
View
14 more retailers have this diamond
Prices start from €1,680 EURSave up to €1,365 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
1.03ct Round
€1,680 EUR