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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 £61,776 GBP
$82,773 USD
As of October 31, 2026
Save £23,823 GBP (28%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £108,990 GBP at MOH London · As of October 18, 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 October 30, 2026, with a 39% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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: Oct 31
Current: £108,990 GBP|Low: £61,776 GBP|High: £109,715 GBP|Avg: £78,166 GBP|+0.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
October 30, 2026
Retailer 7£61,776 GBP
Retailer 3£70,951 GBP
Retailer 5£73,526 GBP
Retailer 6£73,857 GBP
Retailer 4£76,984 GBP
Retailer 2£85,599 GBP
MOH London£108,990 GBP

19 data points across 7 retailers

11 retailers£61,776 GBP to £85,599 GBP

A
Cheapest Retailer
-
£61,776 GBP
$82,773 USD
A
Retailer 2
-
£65,439 GBP
$87,681 USD
View
A
Retailer 3
-
£70,951 GBP
$95,066 USD
View
Final sale: no returns
Retailer 4
-
£72,307 GBP
$96,883 USD
View
Price last confirmed 15 days ago
Retailer 5
-
£72,307 GBP
$96,883 USD
View
Price last confirmed 17 days ago
B+
Retailer 6
-
£74,506 GBP
$99,830 USD
View
B+
Retailer 7
-
£74,506 GBP
$99,830 USD
View
Retailer 8
-
£75,199 GBP
$100,758 USD
View
Price last confirmed 14 days ago
B+
Retailer 9
-
£76,984 GBP
$103,150 USD
View
B+
Retailer 10
-
£85,599 GBP
€109,232 EUR
View
Most Expensive
MOH London
73FFD187C · Oct 18
£108,990 GBP
View
Price last confirmed 14 days ago
10 more retailers have this diamond
Prices start from £61,776 GBPSave up to £23,823 GBP

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
£61,776 GBP