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Round|Natural|GIA

5.21ct K SI1 Round Natural Diamond

EX • K/SI1 • GIA 2135168818

Certificate GIA 2135168818

Diamond specifications and retailer prices

From $100,759 NZD
As of November 6, 2026
Save $62,613 NZD (38%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: $163,372 NZD 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 $100,759 to $163,372, a $62,613 spread on the same certified stone. MOH London lists it at $163,372. 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: $163,372 NZD|Low: $100,759 NZD|High: $165,785 NZD|Avg: $118,000 NZD|-0.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 8$100,759 NZD
Retailer 4$102,763 NZD
Retailer 2$104,998 NZD
Retailer 5$111,329 NZD
Retailer 6$111,329 NZD
Retailer 7$117,751 NZD
Retailer 3$123,475 NZD
MOH London$163,372 NZD

36 data points across 8 retailers

9 retailers$100,759 NZD to $163,372 NZD

A
Cheapest Retailer
-
$100,759 NZD
A
Retailer 2
-
$102,763 NZD
View
A
Retailer 3
-
$104,998 NZD
View
Retailer 4
-
$109,258 NZD
View
Price last confirmed 48 days ago
B+
Retailer 5
-
$111,329 NZD
View
B+
Retailer 6
-
$111,329 NZD
View
B+
Retailer 7
-
$117,751 NZD
View
B+
Retailer 8
-
$123,475 NZD
View
Most Expensive
B
MOH London
AAE49B0FC · Nov 4
$163,372 NZD
£72,314 GBP
View
8 more retailers have this diamond
Prices start from $100,759 NZDSave up to $62,613 NZD

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
$100,759 NZD