Round|Natural|GIA

1.00ct D SI1 Round Natural Diamond

EX • D/SI1 • GIA 2558368590

Certificate GIA 2558368590

Diamond specifications and retailer prices

From €2,131 EUR
HK$18,600 HKD
As of October 31, 2026
Save €2,825 EUR (57%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: €5,522 EUR at NZ Jewellers · As of September 27, 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 SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 2558368590. Listed at 20 retailers as of October 29, 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

1.00
Carat
D
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle31.5°
Pavilion angle41.6°
OriginNatural
Grading LabGIA
CertificateGIA 2558368590
Dimensions6.46 × 6.42 × 3.92 mm
L/W Ratio1.01
Girdle conditionFaceted
Top View
6.46 mm6.42 mm1.00 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2558368590
Side View
Table 59.0%Crown 31.5°Girdle: Slightly ThickPavilion 41.6°Culet: NoneDepth 60.9%

Caratlytics Score

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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: Oct 31
Current: €3,464 EUR|Low: €2,120 EUR|High: €5,364 EUR|Avg: €3,126 EUR|-9.4%
Retailer 1
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
Retailer 16
Retailer 17
October 31, 2026
Retailer 11€2,131 EUR
Retailer 17€2,286 EUR
Retailer 14€2,325 EUR
Retailer 4€2,357 EUR
Retailer 15€2,362 EUR
Retailer 6€2,394 EUR
Retailer 9€2,529 EUR
Retailer 2€2,909 EUR
Retailer 16€2,909 EUR
Retailer 12€2,927 EUR
Retailer 3€3,008 EUR
Retailer 13€3,103 EUR
Retailer 10€3,340 EUR
Retailer 8€3,395 EUR
Retailer 7€3,419 EUR
Retailer 1€3,464 EUR
Retailer 5€4,956 EUR

27 data points across 17 retailers

20 retailers€2,131 EUR to €4,956 EUR

A
Cheapest Retailer
-
€2,131 EUR
HK$18,600 HKD
A
Retailer 2
-
€2,286 EUR
$2,554 USD
View
A
Retailer 3
-
€2,325 EUR
$2,597 USD
View
A
Retailer 4
-
€2,357 EUR
$2,633 USD
View
Final sale: no returns
A
Retailer 5
-
€2,362 EUR
A$4,060 AUD
View
A
Retailer 6
-
€2,394 EUR
$2,675 USD
View
Retailer 7
-
€2,871 EUR
$3,208 USD
View
Price last confirmed 30 days ago
A
Retailer 8
-
€2,909 EUR
$3,250 USD
View
B+
Retailer 9
-
€2,909 EUR
$3,250 USD
View
A
Retailer 10
-
€2,927 EUR
£2,575 GBP
View
Retailer 11
-
€2,982 EUR
$3,331 USD
View
Price last confirmed 32 days ago
B+
Retailer 12
-
€3,008 EUR
$3,360 USD
View
B+
Retailer 13
-
€3,103 EUR
View
Retailer 14
-
€3,313 EUR
$3,701 USD
View
Price last confirmed 31 days ago
B+
Retailer 15
-
€3,340 EUR
$3,732 USD
View
Retailer 16
-
€3,395 EUR
A$5,835 AUD
View
Price last confirmed 29 days ago
Retailer 17
-
€3,419 EUR
$3,820 USD
View
Price last confirmed 8 days ago
B+
Retailer 18
-
€3,464 EUR
ZAR 62,517 ZAR
View
B
Retailer 19
-
€4,956 EUR
£4,360 GBP
View
Most Expensive
NZ Jewellers
edd1479b-0c61-4ddb-aba2-9fc4530b17a1 · Sep 27
€5,522 EUR
$6,169 USD
View
Price last confirmed 34 days ago
19 more retailers have this diamond
Prices start from €2,131 EURSave up to €2,825 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
€2,131 EUR