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3.50ct I SI2 Round Natural Diamond

EX • I/SI2 • IGI 591353387

Shape and cutting style on the report: Round brilliant

Certificate IGI 591353387

Diamond specifications and retailer prices

From £13,500 GBP
₹1,722,742 INR
As of October 24, 2026
Save £10,082 GBP (43%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £23,582 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 591353387. Listed at 12 retailers as of October 24, 2026, with prices from £13,500 to £23,582, a £10,082 spread on the same certified stone. MOH London lists it at £23,582. 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°
Pavilion angle40.5°
OriginNatural
Grading LabIGI
CertificateIGI 591353387
Dimensions9.60 × 9.66 × 6.01 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
IDEAL CUT ROUND BRILLIANT
Top View
9.60 mm9.66 mm3.50 ctI / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 591353387
Side View
Table 57.0%Crown 36°Girdle: MED-STKPavilion 40.5°Culet: NoneDepth 62.4%

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 24
Current: £23,582 GBP|Low: £13,456 GBP|High: £23,740 GBP|Avg: £17,548 GBP|+0.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 29, 2026
Retailer 4£13,500 GBP
Retailer 3£15,241 GBP
Retailer 9£15,785 GBP
Retailer 5£15,888 GBP
Retailer 10£16,578 GBP
Retailer 6£17,407 GBP
Retailer 7£17,960 GBP
Retailer 2£18,272 GBP
Retailer 8£18,651 GBP
Retailer 11£21,277 GBP
MOH London£23,582 GBP

42 data points across 11 retailers

12 retailers£13,500 GBP to £23,582 GBP

A
Cheapest Retailer
-
£13,500 GBP
₹1,722,742 INR
A
Retailer 2
-
£15,241 GBP
$20,421 USD
View
A
Retailer 3
-
£15,785 GBP
A$32,538 AUD
View
A
Retailer 4
-
£15,888 GBP
$21,288 USD
View
Final sale: no returns
A
Retailer 5
-
£16,578 GBP
$22,213 USD
View
Retailer 6
-
£17,210 GBP
$23,060 USD
View
Price last confirmed 74 days ago
A
Retailer 7
-
£17,407 GBP
$23,324 USD
View
A
Retailer 8
-
£17,960 GBP
$24,064 USD
View
A
Retailer 9
-
£18,272 GBP
€23,316 EUR
View
B+
Retailer 10
-
£18,651 GBP
$24,990 USD
View
B+
Retailer 11
-
£21,277 GBP
$28,509 USD
View
Most Expensive
B+
MOH London
04DD6A172 · Oct 29
£23,582 GBP
View
11 more retailers have this diamond
Prices start from £13,500 GBPSave up to £10,082 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
£13,500 GBP