Round|Natural|GIA

4.25ct K SI1 Round Natural Diamond

EX • K/SI1

Diamond specifications and retailer prices

From €30,927 EUR
As of November 6, 2026
Save €7,611 EUR (20%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: €39,793 EUR at Aurelinne · As of October 23, 2026
View at Aurelinne

About this 4.25ct natural round diamond

This 4.25ct natural round sits in the three to five carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA. Listed at 15 retailers as of November 6, 2026, with a relatively tight 25% spread, which is unusual at this carat range and suggests competitive pricing across the listings. 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

4.25
Carat
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
OriginNatural
Grading LabGIA
Dimensions10.31 × 10.40 × 6.40 mm
L/W Ratio1.01
Top View
10.31 mm10.40 mm4.25 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA
Side View
Table 60.0%CrownGirdle: Slightly ThickPavilionCulet: NoneDepth 61.9%

Caratlytics Score

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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: €38,428 EUR|Low: €30,927 EUR|High: €39,867 EUR|Avg: €37,069 EUR|-3.4%
Aurelinne
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 2, 2026
Retailer 5€30,927 EUR
Retailer 8€34,325 EUR
Retailer 10€35,372 EUR
Retailer 4€35,504 EUR
Retailer 2€35,581 EUR
Retailer 3€35,581 EUR
Retailer 6€37,005 EUR
Retailer 7€37,111 EUR
Aurelinne€38,428 EUR
Retailer 9€38,538 EUR

19 data points across 10 retailers

15 retailers€30,927 EUR to €38,538 EUR

A
Cheapest Retailer
-
€30,927 EUR
Retailer 2
-
€32,013 EUR
View
Price last confirmed 14 days ago
B+
Retailer 3
-
€34,325 EUR
View
Retailer 4
-
€35,372 EUR
View
Price last confirmed 8 days ago
B+
Retailer 5
-
€35,504 EUR
View
B+
Retailer 6
-
€35,581 EUR
View
B+
Retailer 7
-
€35,581 EUR
View
Retailer 8
-
€36,846 EUR
View
Price last confirmed 15 days ago
B+
Retailer 9
-
€37,005 EUR
View
B+
Retailer 10
-
€37,111 EUR
View
Retailer 11
-
€38,320 EUR
View
Price last confirmed 15 days ago
Retailer 12
-
€38,390 EUR
View
Price last confirmed 11 days ago
B+
Retailer 13
-
€38,428 EUR
View
B+
Retailer 14
-
€38,538 EUR
View
Most Expensive
Aurelinne
ef843a20-8ae8-4ab8-b564-142ec00080e9 · Oct 23
€39,793 EUR
$44,664 USD
View
Price last confirmed 14 days ago
14 more retailers have this diamond
Prices start from €30,927 EURSave up to €7,611 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
4.25ct Round
€30,927 EUR