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Round|Natural|GIA

5.21ct G SI2 Round Natural Diamond

EX • G/SI2 • GIA 5221562779

Certificate GIA 5221562779

Diamond specifications and retailer prices

From $135,374 AUD
$95,093 USD
As of October 30, 2026
Save $85,672 AUD (39%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: $221,046 AUD at MOH London · As of November 1, 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 G colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 5221562779. Listed at 7 retailers as of October 30, 2026, with prices from $135,374 to $221,046, a $85,672 spread on the same certified stone. MOH London lists it at $221,046. 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
G
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle34.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 5221562779
Dimensions11.05 × 11.12 × 6.87 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizeNone
Key to symbols
Crystal, Feather, Cloud, Needle
Top View
11.05 mm11.12 mm5.21 ctG / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 5221562779
Side View
Table 56.0%Crown 34.5°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 61.9%

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: Oct 30
Current: $221,046 AUD|Low: $135,374 AUD|High: $278,721 AUD|Avg: $163,895 AUD|-0.9%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 1, 2026
Retailer 5$135,374 AUD
Retailer 7$136,137 AUD
Retailer 2$142,197 AUD
Retailer 4$147,434 AUD
Retailer 6$159,094 AUD
Retailer 3$171,735 AUD
MOH London$221,046 AUD

22 data points across 7 retailers

7 retailers$135,374 AUD to $221,046 AUD

A
Cheapest Retailer
-
$135,374 AUD
$95,093 USD
A
Retailer 2
-
$136,137 AUD
$95,628 USD
View
A
Retailer 3
-
$142,197 AUD
£78,650 GBP
View
B+
Retailer 4
-
$147,434 AUD
$103,564 USD
View
B+
Retailer 5
-
$159,094 AUD
$111,755 USD
View
B+
Retailer 6
-
$171,735 AUD
€114,890 EUR
View
Most Expensive
B
MOH London
6249AAB8A · Nov 1
$221,046 AUD
£122,262 GBP
View
6 more retailers have this diamond
Prices start from $135,374 AUDSave up to $85,672 AUD

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
$135,374 AUD