Round|Natural|GIA

3.21ct M SI1 Round Natural Diamond

EX • M/SI1 • GIA 1493947605

Certificate GIA 1493947605

Diamond specifications and retailer prices

From £11,553 GBP
As of November 4, 2026
Save £2,724 GBP (19%) vs most expensive(unlock to see where)
13 retailers carry this diamond
Most expensive: £16,268 GBP at NZ Jewellers · As of September 15, 2026
View at NZ Jewellers

About this 3.21ct natural round diamond

This 3.21ct natural round sits in the three to five carat band, graded M colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1493947605. Listed at 13 retailers as of November 4, 2026, with a relatively tight 24% spread, which is unusual at this carat range and suggests competitive pricing across the listings. 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
M
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.5°
Pavilion angle40.8°
OriginNatural
Grading LabGIA
CertificateGIA 1493947605
Dimensions9.49 × 9.53 × 5.83 mm
L/W Ratio1.00
Star length50%
Lower girdle80%
Culet sizeNone
Cert comments
Additional clouds pinpoints internal graining and surface graining are not shown.
Top View
9.49 mm9.53 mm3.21 ctM / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1493947605
Side View
Table 56.0%Crown 34.5°GirdlePavilion 40.8°Culet: NoneDepth 61.3%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 4
Current: £11,991 GBP|Low: £11,442 GBP|High: £16,178 GBP|Avg: £13,602 GBP|-13.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 6, 2026
Retailer 6£11,553 GBP
Retailer 7£11,653 GBP
Retailer 4£11,984 GBP
Retailer 1£11,991 GBP
Retailer 5£13,352 GBP
Retailer 2£13,602 GBP
Retailer 8£13,936 GBP
Retailer 3£14,277 GBP

42 data points across 8 retailers

13 retailers£11,553 GBP to £14,277 GBP

A
Cheapest Retailer
-
£11,553 GBP
A
Retailer 2
-
£11,653 GBP
View
B+
Retailer 3
-
£11,984 GBP
View
B+
Retailer 4
-
£11,991 GBP
View
B+
Retailer 5
-
£13,352 GBP
View
B+
Retailer 6
-
£13,602 GBP
View
Retailer 7
-
£13,732 GBP
View
Price last confirmed 53 days ago
Retailer 8
-
£14,259 GBP
View
Price last confirmed 53 days ago
B+
Retailer 9
-
£14,277 GBP
View
Retailer 10
-
£14,633 GBP
View
Price last confirmed 38 days ago
Retailer 11
-
£15,098 GBP
View
Price last confirmed 36 days ago
Retailer 12
-
£15,679 GBP
View
Price last confirmed 38 days ago
Most Expensive
NZ Jewellers
3fee2b49-c1c0-44fa-9964-eb392d633b56 · Sep 15
£16,268 GBP
$21,895 USD
View
Price last confirmed 52 days ago
12 more retailers have this diamond
Prices start from £11,553 GBPSave up to £2,724 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
3.21ct Round
£11,553 GBP