Round|Natural|GIA

6.18ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 5234208640

Certificate GIA 5234208640

Diamond specifications and retailer prices

From €64,633 EUR
As of November 6, 2026
Save €20,500 EUR (24%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: €85,133 EUR at Yorxs · As of November 5, 2026
View at Yorxs

About this 6.18ct natural round diamond

This 6.18ct natural round sits in the over five carat band, graded K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 5234208640. Listed at 10 retailers as of November 5, 2026, with prices from €64,633 to €85,133, a €20,500 spread on the same certified stone. Yorxs lists it at €85,133. 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

6.18
Carat
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceFaint
Crown angle35.5°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 5234208640
Dimensions11.66 × 11.60 × 7.28 mm
L/W Ratio1.01
Star length50%
Lower girdle75%
Top View
11.66 mm11.60 mm6.18 ctK / SI1
OriginNatural
CutExcellent
PolishVery Good
SymmetryExcellent
FluorescenceFaint
CertificateGIA 5234208640
Side View
Table 58.0%Crown 35.5°Girdle: STK-STKPavilion 41°Culet: NoneDepth 62.6%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 6
Current: €64,633 EUR|Low: €62,469 EUR|High: €85,590 EUR|Avg: €72,853 EUR|-1.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Yorxs
November 6, 2026
Retailer 6€62,469 EUR
Retailer 1€64,633 EUR
Retailer 2€69,885 EUR
Retailer 4€73,683 EUR
Retailer 3€76,751 EUR
Retailer 5€76,769 EUR
Yorxs€85,133 EUR

40 data points across 7 retailers

10 retailers€64,633 EUR to €85,133 EUR

Retailer 1
-
€62,469 EUR
Price last confirmed 19 days ago
A
Retailer 2
-
€64,633 EUR
View
B+
Retailer 3
-
€64,662 EUR
View
B+
Retailer 4
-
€65,271 EUR
View
B+
Retailer 5
-
€69,474 EUR
View
B+
Retailer 6
-
€69,885 EUR
View
B+
Retailer 7
-
€73,683 EUR
View
B+
Retailer 8
-
€76,751 EUR
View
B
Retailer 9
-
€76,769 EUR
View
Most Expensive
B
Yorxs
GYMY191 · Nov 5
€85,133 EUR
View
9 more retailers have this diamond
Prices start from €64,633 EURSave up to €20,500 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
6.18ct Round
€64,633 EUR