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Round|Natural|GIA

5.21ct G SI2 Round Natural Diamond

EX • G/SI2 • GIA 5231475571

Certificate GIA 5231475571

Diamond specifications and retailer prices

From $117,836 AUD
$82,773 USD
As of November 1, 2026
Save $88,951 AUD (43%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: $206,787 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 5231475571. Listed at 11 retailers as of November 1, 2026, with prices from $117,836 to $206,787, a $88,951 spread on the same certified stone. MOH London lists it at $206,787. 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
Pavilion angle41.4°
OriginNatural
Grading LabGIA
CertificateGIA 5231475571
Dimensions11.27 × 11.32 × 6.77 mm
L/W Ratio1.00
Top View
11.27 mm11.32 mm5.21 ctG / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateGIA 5231475571
Side View
Table 59.0%CrownGirdle: MED-STKPavilion 41.4°Culet: NoneDepth 59.9%

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: Nov 1
Current: $206,787 AUD|Low: $123,033 AUD|High: $209,278 AUD|Avg: $154,363 AUD|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 1, 2026
Retailer 3$135,336 AUD
Retailer 5$140,249 AUD
Retailer 6$140,879 AUD
Retailer 4$146,844 AUD
Retailer 2$162,131 AUD
MOH London$206,787 AUD

20 data points across 6 retailers

11 retailers$117,836 AUD to $206,787 AUD

A
Cheapest Retailer
-
$117,836 AUD
$82,773 USD
A
Retailer 2
-
$124,822 AUD
$87,681 USD
View
A
Retailer 3
-
$135,336 AUD
$95,066 USD
View
Final sale: no returns
Retailer 4
-
$137,923 AUD
$96,883 USD
View
Price last confirmed 15 days ago
Retailer 5
-
$137,923 AUD
$96,883 USD
View
Price last confirmed 17 days ago
B+
Retailer 6
-
$142,118 AUD
$99,830 USD
View
B+
Retailer 7
-
$142,118 AUD
$99,830 USD
View
Retailer 8
-
$143,439 AUD
$100,758 USD
View
Price last confirmed 15 days ago
B+
Retailer 9
-
$146,844 AUD
$103,150 USD
View
B+
Retailer 10
-
$162,131 AUD
€108,465 EUR
View
Most Expensive
B
MOH London
73FFD187C · Nov 1
$206,787 AUD
£114,375 GBP
View
10 more retailers have this diamond
Prices start from $117,836 AUDSave up to $88,951 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
$117,836 AUD