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Round|Natural|GIA

1.00ct D SI2 Round Natural Diamond

EX • D/SI2 • GIA 2564040643

Certificate GIA 2564040643

Diamond specifications and retailer prices

From €1,687 EUR
As of November 6, 2026
Save €2,118 EUR (56%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: €4,774 EUR at NZ Jewellers · As of September 21, 2026
View at NZ Jewellers

About this 1ct natural round diamond

This 1ct natural round sits in the classic one-carat band, graded D colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2564040643. Listed at 10 retailers as of November 4, 2026, with a 126% 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

1.00
Carat
D
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle41.6°
OriginNatural
Grading LabGIA
CertificateGIA 2564040643
Dimensions6.33 × 6.38 × 3.98 mm
L/W Ratio1.01
Culet sizeNone
Key to symbols
Crystal, Feather, Cavity, Extra Facet
Top View
6.33 mm6.38 mm1.00 ctD / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2564040643
Side View
Table 59.0%Crown 34.5°Girdle: MED-STKPavilion 41.6°Culet: NoneDepth 62.6%

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: €1,690 EUR|Low: €1,676 EUR|High: €3,980 EUR|Avg: €2,333 EUR|-5.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 5€1,687 EUR
Retailer 1€1,690 EUR
Retailer 7€2,011 EUR
Retailer 2€2,084 EUR
Retailer 6€2,346 EUR
Retailer 4€2,635 EUR
Retailer 3€3,805 EUR

36 data points across 7 retailers

10 retailers€1,687 EUR to €3,805 EUR

A
Cheapest Retailer
-
€1,687 EUR
A
Retailer 2
-
€1,690 EUR
View
A
Retailer 3
-
€2,011 EUR
View
Final sale: no returns
A
Retailer 4
-
€2,084 EUR
View
Retailer 5
-
€2,284 EUR
View
Price last confirmed 44 days ago
A
Retailer 6
-
€2,344 EUR
View
Retailer 7
-
€2,346 EUR
View
Price last confirmed 10 days ago
A
Retailer 8
-
€2,635 EUR
View
B+
Retailer 9
-
€3,805 EUR
View
Most Expensive
NZ Jewellers
d5859d22-8a46-45b3-9940-0cfdf16a9d40 · Sep 21
€4,774 EUR
$5,358 USD
View
Price last confirmed 45 days ago
9 more retailers have this diamond
Prices start from €1,687 EURSave up to €2,118 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
€1,687 EUR