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Round|Natural|GIA

1.00ct D SI1 Round Natural Diamond

EX • D/SI1 • GIA 2557652255

Certificate GIA 2557652255

Diamond specifications and retailer prices

From €2,784 EUR
HK$24,300 HKD
As of October 31, 2026
Save €3,482 EUR (56%) vs most expensive(unlock to see where)
24 retailers carry this diamond
Most expensive: €6,493 EUR at NZ Jewellers · As of October 3, 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 2557652255. Listed at 24 retailers as of October 29, 2026, with a 125% 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
Color
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 2557652255
Dimensions6.36 × 6.42 × 4.01 mm
L/W Ratio1.01
Star length50%
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Cavity, Needle
Top View
6.36 mm6.42 mm1.00 ctD / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2557652255
Side View
Table 56.0%Crown 35.5°Girdle: MED-STKPavilion 41.2°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: Oct 31
Current: €4,581 EUR|Low: €2,761 EUR|High: €6,308 EUR|Avg: €3,803 EUR|+1.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 31, 2026
Retailer 5€2,784 EUR
Retailer 4€2,803 EUR
Retailer 11€3,279 EUR
Retailer 2€3,439 EUR
Retailer 3€3,545 EUR
Retailer 8€3,597 EUR
Retailer 6€3,789 EUR
Retailer 7€3,977 EUR
Retailer 10€4,257 EUR
Retailer 1€4,581 EUR
Retailer 9€6,266 EUR

27 data points across 11 retailers

24 retailers€2,784 EUR to €6,266 EUR

A
Cheapest Retailer
-
€2,784 EUR
HK$24,300 HKD
A
Retailer 2
-
€2,803 EUR
₹298,244 INR
View
B+
Retailer 3
-
€3,095 EUR
A$5,320 AUD
View
B+
Retailer 4
-
€3,279 EUR
$3,663 USD
View
B+
Retailer 5
-
€3,439 EUR
$3,842 USD
View
Final sale: no returns
B+
Retailer 6
-
€3,512 EUR
SGD 5,302 SGD
View
B+
Retailer 7
-
€3,519 EUR
A$6,048 AUD
View
B+
Retailer 8
-
€3,545 EUR
$3,960 USD
View
B+
Retailer 9
-
€3,597 EUR
£3,164 GBP
View
Retailer 10
-
€3,597 EUR
$4,019 USD
View
Price last confirmed 37 days ago
Retailer 11
-
€3,597 EUR
$4,019 USD
View
Price last confirmed 32 days ago
Retailer 12
-
€3,727 EUR
$4,164 USD
View
Price last confirmed 24 days ago
Retailer 13
-
€3,727 EUR
$4,164 USD
View
Price last confirmed 24 days ago
B+
Retailer 14
-
€3,789 EUR
£3,333 GBP
View
B+
Retailer 15
-
€3,859 EUR
$4,312 USD
View
B+
Retailer 16
-
€3,977 EUR
View
Retailer 17
-
€3,996 EUR
A$6,868 AUD
View
Price last confirmed 28 days ago
B+
Retailer 18
-
€4,257 EUR
£3,745 GBP
View
Retailer 19
-
€4,300 EUR
$4,804 USD
View
Price last confirmed 40 days ago
Retailer 20
-
€4,300 EUR
$4,804 USD
View
Price last confirmed 28 days ago
B
Retailer 21
-
€4,581 EUR
ZAR 82,683 ZAR
View
B
Retailer 22
-
€6,266 EUR
£5,512 GBP
View
Retailer 23
-
€6,267 EUR
$7,001 USD
View
Price last confirmed 35 days ago
Most Expensive
NZ Jewellers
c622d397-570c-4952-9c80-b0d5219df204 · Oct 3
€6,493 EUR
$7,254 USD
View
Price last confirmed 29 days ago
23 more retailers have this diamond
Prices start from €2,784 EURSave up to €3,482 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
€2,784 EUR