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Round|Natural|GIA

1.00ct J SI2 Round Natural Diamond

EX • J/SI2 • GIA 6305896366

Certificate GIA 6305896366

Diamond specifications and retailer prices

From €1,140 EUR
As of November 6, 2026
Save €2,596 EUR (69%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: €3,737 EUR at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1ct natural round diamond

This 1ct natural round sits in the classic one-carat band, graded J colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 6305896366. Listed at 17 retailers as of November 5, 2026, with prices from €1,140 to €3,737, a €2,596 spread on the same certified stone. NZ Jewellers lists it at €3,737. 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

1.00
Carat
J
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle36°
Pavilion angle40.6°
OriginNatural
Grading LabGIA
CertificateGIA 6305896366
Dimensions6.40 × 6.34 × 3.94 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Top View
6.40 mm6.34 mm1.00 ctJ / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateGIA 6305896366
Side View
Table 59.0%Crown 36°Girdle: ThickPavilion 40.6°Culet: NoneDepth 61.8%

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: €1,466 EUR|Low: €1,129 EUR|High: €2,717 EUR|Avg: €1,634 EUR|-1.8%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 6, 2026
Retailer 9€1,140 EUR
Retailer 8€1,344 EUR
Retailer 2€1,396 EUR
Retailer 11€1,414 EUR
Retailer 10€1,434 EUR
Retailer 1€1,466 EUR
Retailer 4€1,591 EUR
Retailer 3€1,603 EUR
Retailer 6€1,690 EUR
Retailer 5€1,933 EUR
Retailer 7€2,676 EUR

41 data points across 11 retailers

17 retailers€1,140 EUR to €3,737 EUR

A
Cheapest Retailer
-
€1,140 EUR
A
Retailer 2
-
€1,344 EUR
View
A
Retailer 3
-
€1,396 EUR
View
A
Retailer 4
-
€1,414 EUR
View
Final sale: no returns
A
Retailer 5
-
€1,434 EUR
View
A
Retailer 6
-
€1,466 EUR
View
Retailer 7
-
€1,532 EUR
View
Price last confirmed 8 days ago
B+
Retailer 8
-
€1,532 EUR
View
B+
Retailer 9
-
€1,591 EUR
View
B+
Retailer 10
-
€1,603 EUR
View
B+
Retailer 11
-
€1,616 EUR
View
B+
Retailer 12
-
€1,654 EUR
View
B+
Retailer 13
-
€1,690 EUR
View
B+
Retailer 14
-
€1,768 EUR
View
B+
Retailer 15
-
€1,933 EUR
View
B
Retailer 16
-
€2,676 EUR
View
Most Expensive
C
NZ Jewellers
184be088-16c0-4203-b2fc-8cb6bf618a2b · Nov 5
€3,737 EUR
$4,194 USD
View
16 more retailers have this diamond
Prices start from €1,140 EURSave up to €2,596 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
1.00ct Round
€1,140 EUR