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Round|Natural|GIA

6.18ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 5234208640

Certificate GIA 5234208640

Diamond specifications and retailer prices

From $101,360 CAD
As of November 4, 2026
Save $32,090 CAD (24%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $133,450 CAD 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 4, 2026, with prices from $101,360 to $133,450, a $32,090 spread on the same certified stone. Yorxs lists it at $133,450. 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
Color
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

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 4
Current: $109,548 CAD|Low: $97,923 CAD|High: $134,165 CAD|Avg: $114,197 CAD|-3.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Yorxs
November 6, 2026
Retailer 6$97,923 CAD
Retailer 2$101,724 CAD
Retailer 1$109,548 CAD
Retailer 4$115,502 CAD
Retailer 3$120,310 CAD
Retailer 5$120,338 CAD
Yorxs$133,450 CAD

40 data points across 7 retailers

10 retailers$101,360 CAD to $133,450 CAD

Retailer 1
-
$97,923 CAD
Price last confirmed 19 days ago
B+
Retailer 2
-
$101,360 CAD
View
A
Retailer 3
-
$101,724 CAD
View
B+
Retailer 4
-
$102,315 CAD
View
B+
Retailer 5
-
$108,903 CAD
View
B+
Retailer 6
-
$109,548 CAD
View
B+
Retailer 7
-
$115,502 CAD
View
B+
Retailer 8
-
$120,310 CAD
View
B
Retailer 9
-
$120,338 CAD
View
Most Expensive
B
Yorxs
GYMY191 · Nov 5
$133,450 CAD
€91,003 EUR
View
9 more retailers have this diamond
Prices start from $101,360 CADSave up to $32,090 CAD

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
$101,360 CAD