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Round|Natural|GIA

3.21ct I SI1 Round Natural Diamond

EX • I/SI1 • GIA 1545414829

Certificate GIA 1545414829

Diamond specifications and retailer prices

From £26,036 GBP
CA$48,451 CAD
As of October 30, 2026
Save £17,435 GBP (40%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £43,471 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 3.21ct natural round diamond

This 3.21ct natural round sits in the three to five carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1545414829. Listed at 7 retailers as of October 30, 2026, with prices from £26,036 to £43,471, a £17,435 spread on the same certified stone. MOH London lists it at £43,471. 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

3.21
Carat
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.5°
Pavilion angle41.2°
OriginNatural
Grading LabGIA
CertificateGIA 1545414829
Dimensions9.37 × 9.41 × 5.87 mm
L/W Ratio1.00
Culet sizeNone
Top View
9.37 mm9.41 mm3.21 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1545414829
Side View
Table 58.0%Crown 35.5°Girdle: MediumPavilion 41.2°Culet: NoneDepth 62.5%

Caratlytics Score

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B+
Very Good
Strong quality and value balance
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: £43,471 GBP|Low: £25,592 GBP|High: £45,278 GBP|Avg: £31,195 GBP|-3.0%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 1, 2026
Retailer 8£25,592 GBP
Retailer 6£26,036 GBP
Retailer 4£27,335 GBP
Retailer 3£27,598 GBP
Retailer 5£30,595 GBP
Retailer 7£32,567 GBP
Retailer 2£33,624 GBP
MOH London£43,471 GBP

40 data points across 8 retailers

7 retailers£26,036 GBP to £43,471 GBP

B+
Cheapest Retailer
-
£26,036 GBP
CA$48,451 CAD
Retailer 2
-
£27,335 GBP
A$56,348 AUD
View
Price last confirmed 28 days ago
B+
Retailer 3
-
£27,598 GBP
View
B+
Retailer 4
-
£30,595 GBP
$40,994 USD
View
B
Retailer 5
-
£32,567 GBP
$43,636 USD
View
B
Retailer 6
-
£33,624 GBP
€42,907 EUR
View
Most Expensive
B
MOH London
ECA3AF512 · Nov 1
£43,471 GBP
View
6 more retailers have this diamond
Prices start from £26,036 GBPSave up to £17,435 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.

B+
3.21ct Round
£26,036 GBP