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3.50ct I SI2 Round Natural Diamond

EX • I/SI2 • IGI 635461965

Shape and cutting style on the report: Round brilliant

Certificate IGI 635461965

Diamond specifications and retailer prices

From £15,384 GBP
$20,613 USD
As of October 30, 2026
Save £12,574 GBP (45%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £27,958 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 3.5ct natural round diamond

This 3.5ct natural round sits in the three to five carat band, graded I colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI 635461965. Listed at 16 retailers as of October 29, 2026, with prices from £15,384 to £27,958, a £12,574 spread on the same certified stone. MOH London lists it at £27,958. 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

3.50
Carat
I
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.4°
Pavilion angle40.6°
OriginNatural
Grading LabIGI
CertificateIGI 635461965
Dimensions9.60 × 9.51 × 6.05 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Top View
9.60 mm9.51 mm3.50 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 635461965
Side View
Table 57.0%Crown 36.4°Girdle: Slightly ThickPavilion 40.6°Culet: NoneDepth 63.2%

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: £27,958 GBP|Low: £14,913 GBP|High: £28,144 GBP|Avg: £18,546 GBP|+2.6%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
October 30, 2026
Retailer 7£15,384 GBP
Retailer 5£15,535 GBP
Retailer 8£16,369 GBP
Retailer 10£16,477 GBP
Retailer 9£16,505 GBP
Retailer 6£17,064 GBP
Retailer 3£17,420 GBP
Retailer 11£18,872 GBP
Retailer 12£19,597 GBP
Retailer 2£20,861 GBP
Retailer 4£21,912 GBP
MOH London£27,958 GBP

30 data points across 12 retailers

16 retailers£15,384 GBP to £27,958 GBP

A
Cheapest Retailer
-
£15,384 GBP
$20,613 USD
Retailer 2
-
£15,535 GBP
$20,815 USD
View
Price last confirmed 9 days ago
A
Retailer 3
-
£16,369 GBP
$21,933 USD
View
A
Retailer 4
-
£16,477 GBP
$22,078 USD
View
A
Retailer 5
-
£16,505 GBP
$22,116 USD
View
A
Retailer 6
-
£17,064 GBP
$22,864 USD
View
Final sale: no returns
Retailer 7
-
£17,807 GBP
$23,859 USD
View
Price last confirmed 19 days ago
Retailer 8
-
£18,696 GBP
$25,051 USD
View
Price last confirmed 31 days ago
Retailer 9
-
£18,872 GBP
$25,286 USD
View
Price last confirmed 41 days ago
Retailer 10
-
£19,290 GBP
$25,847 USD
View
Price last confirmed 23 days ago
Retailer 11
-
£19,597 GBP
$26,258 USD
View
Price last confirmed 41 days ago
Retailer 12
-
£20,032 GBP
$26,841 USD
View
Price last confirmed 21 days ago
A
Retailer 13
-
£20,861 GBP
€26,621 EUR
View
Retailer 14
-
£24,678 GBP
$33,066 USD
View
Price last confirmed 41 days ago
Retailer 15
-
£25,226 GBP
$33,800 USD
View
Price last confirmed 27 days ago
Most Expensive
B+
MOH London
126A1AAD9 · Oct 29
£27,958 GBP
View
15 more retailers have this diamond
Prices start from £15,384 GBPSave up to £12,574 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
3.50ct Round
£15,384 GBP