Round|Natural|GIA

6.18ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 5234208640

Certificate GIA 5234208640

Diamond specifications and retailer prices

From $72,576 USD
As of November 4, 2026
Save $22,977 USD (24%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $95,553 USD 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 $72,576 to $95,553, a $22,977 spread on the same certified stone. Yorxs lists it at $95,553. 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: $78,439 USD|Low: $70,115 USD|High: $96,066 USD|Avg: $81,768 USD|-3.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Yorxs
November 6, 2026
Retailer 6$70,115 USD
Retailer 2$72,837 USD
Retailer 1$78,439 USD
Retailer 4$82,702 USD
Retailer 3$86,145 USD
Retailer 5$86,165 USD
Yorxs$95,553 USD

40 data points across 7 retailers

10 retailers$72,576 USD to $95,553 USD

Retailer 1
-
$70,115 USD
Price last confirmed 19 days ago
B+
Retailer 2
-
$72,576 USD
View
A
Retailer 3
-
$72,837 USD
View
B+
Retailer 4
-
$73,260 USD
View
B+
Retailer 5
-
$77,977 USD
View
B+
Retailer 6
-
$78,439 USD
View
B+
Retailer 7
-
$82,702 USD
View
B+
Retailer 8
-
$86,145 USD
View
B
Retailer 9
-
$86,165 USD
View
Most Expensive
B
Yorxs
GYMY191 · Nov 5
$95,553 USD
€91,003 EUR
View
9 more retailers have this diamond
Prices start from $72,576 USDSave up to $22,977 USD

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
$72,576 USD