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5.21ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 2135168818

Certificate GIA 2135168818

Diamond specifications and retailer prices

From $72,348 SGD
As of November 6, 2026
Save $44,958 SGD (38%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $117,306 SGD at MOH London · As of November 4, 2026
View at MOH London

About this 5.21ct natural round diamond

This 5.21ct 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 2135168818. Listed at 9 retailers as of November 4, 2026, with prices from $72,348 to $117,306, a $44,958 spread on the same certified stone. MOH London lists it at $117,306. 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

5.21
Carat
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 2135168818
Dimensions11.05 × 11.08 × 6.86 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizeNone
Top View
11.05 mm11.08 mm5.21 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 2135168818
Side View
Table 57.0%Crown 35°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 62.0%

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 6
Current: $117,306 SGD|Low: $72,348 SGD|High: $119,038 SGD|Avg: $84,728 SGD|-0.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 8$72,348 SGD
Retailer 4$73,787 SGD
Retailer 2$75,391 SGD
Retailer 5$79,937 SGD
Retailer 6$79,937 SGD
Retailer 7$84,548 SGD
Retailer 3$88,659 SGD
MOH London$117,306 SGD

36 data points across 8 retailers

9 retailers$72,348 SGD to $117,306 SGD

A
Cheapest Retailer
-
$72,348 SGD
A
Retailer 2
-
$73,787 SGD
View
A
Retailer 3
-
$75,391 SGD
View
Retailer 4
-
$78,450 SGD
View
Price last confirmed 48 days ago
B+
Retailer 5
-
$79,937 SGD
View
B+
Retailer 6
-
$79,937 SGD
View
B+
Retailer 7
-
$84,548 SGD
View
B+
Retailer 8
-
$88,659 SGD
View
Most Expensive
B
MOH London
AAE49B0FC · Nov 4
$117,306 SGD
£72,314 GBP
View
8 more retailers have this diamond
Prices start from $72,348 SGDSave up to $44,958 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
5.21ct Round
$72,348 SGD