CaratHunter
Plans
Round|Natural|GIA

1.00ct J SI1 Round Natural Diamond

EX • J/SI1 • GIA 2506134651

Shape and cutting style on the report: Round brilliant

Certificate GIA 2506134651

Diamond specifications and retailer prices

From €1,644 EUR
As of November 6, 2026
Save €3,117 EUR (65%) vs most expensive(unlock to see where)
21 retailers carry this diamond
Most expensive: €4,760 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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2506134651. Listed at 21 retailers as of November 5, 2026, with prices from €1,644 to €4,760, a €3,117 spread on the same certified stone. NZ Jewellers lists it at €4,760. 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
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle35.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 2506134651
Dimensions6.39 × 6.35 × 3.99 mm
L/W Ratio1.01
Star length50%
Lower girdle80%
Top View
6.39 mm6.35 mm1.00 ctJ / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 2506134651
Side View
Table 57.0%Crown 35.5°Girdle: MED-STKPavilion 41°Culet: NoneDepth 62.7%

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: €1,644 EUR|Low: €1,644 EUR|High: €4,037 EUR|Avg: €2,434 EUR|-3.4%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 6, 2026
Retailer 1€1,644 EUR
Retailer 7€1,673 EUR
Retailer 8€2,057 EUR
Retailer 9€2,101 EUR
Retailer 2€2,149 EUR
Retailer 3€2,395 EUR
Retailer 6€2,574 EUR
Retailer 4€2,779 EUR
Retailer 5€3,979 EUR

29 data points across 9 retailers

21 retailers€1,644 EUR to €4,760 EUR

A
Cheapest Retailer
-
€1,644 EUR
B+
Retailer 2
-
€1,673 EUR
View
B+
Retailer 3
-
€1,993 EUR
View
B+
Retailer 4
-
€1,996 EUR
View
B+
Retailer 5
-
€2,057 EUR
View
Retailer 6
-
€2,075 EUR
View
Price last confirmed 82 days ago
B
Retailer 7
-
€2,101 EUR
View
Final sale: no returns
B+
Retailer 8
-
€2,149 EUR
View
B+
Retailer 9
-
€2,257 EUR
View
B+
Retailer 10
-
€2,277 EUR
View
B
Retailer 11
-
€2,320 EUR
View
B
Retailer 12
-
€2,382 EUR
View
B+
Retailer 13
-
€2,395 EUR
View
B
Retailer 14
-
€2,402 EUR
View
Retailer 15
-
€2,551 EUR
View
Price last confirmed 30 days ago
B
Retailer 16
-
€2,574 EUR
View
B
Retailer 17
-
€2,627 EUR
View
B
Retailer 18
-
€2,779 EUR
View
B
Retailer 19
-
€3,120 EUR
View
B
Retailer 20
-
€3,979 EUR
View
Most Expensive
B
NZ Jewellers
8b7bb6df-972d-41c2-b5d1-2a135753b617 · Nov 5
€4,760 EUR
$5,315 USD
View
20 more retailers have this diamond
Prices start from €1,644 EURSave up to €3,117 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
€1,644 EUR