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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 $92,701 SGD
As of November 4, 2026
Save $29,349 SGD (24%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: $122,050 SGD 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 $92,701 to $122,050, a $29,349 spread on the same certified stone. Yorxs lists it at $122,050. 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

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: Nov 4
Current: $100,190 SGD|Low: $89,558 SGD|High: $122,705 SGD|Avg: $104,442 SGD|-3.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Yorxs
November 6, 2026
Retailer 6$89,558 SGD
Retailer 2$93,035 SGD
Retailer 1$100,190 SGD
Retailer 4$105,635 SGD
Retailer 3$110,033 SGD
Retailer 5$110,059 SGD
Yorxs$122,050 SGD

40 data points across 7 retailers

10 retailers$92,701 SGD to $122,050 SGD

Retailer 1
-
$89,558 SGD
Price last confirmed 19 days ago
B+
Retailer 2
-
$92,701 SGD
View
A
Retailer 3
-
$93,035 SGD
View
B+
Retailer 4
-
$93,575 SGD
View
B+
Retailer 5
-
$99,600 SGD
View
B+
Retailer 6
-
$100,190 SGD
View
B+
Retailer 7
-
$105,635 SGD
View
B+
Retailer 8
-
$110,033 SGD
View
B
Retailer 9
-
$110,059 SGD
View
Most Expensive
B
Yorxs
GYMY191 · Nov 5
$122,050 SGD
€91,003 EUR
View
9 more retailers have this diamond
Prices start from $92,701 SGDSave up to $29,349 SGD

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
$92,701 SGD