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Round|Natural|IGI

3.50ct K SI1 Round Natural Diamond

EX • K/SI1 • IGI 533209970

Shape and cutting style on the report: Round brilliant

Certificate IGI 533209970

Diamond specifications and retailer prices

From £15,222 GBP
As of November 5, 2026
Save £8,143 GBP (35%) vs most expensive(unlock to see where)
22 retailers carry this diamond
Most expensive: £23,364 GBP at MOH London · As of November 4, 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 K colour (faint-tinted) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI 533209970. Listed at 22 retailers as of November 4, 2026, with prices from £15,222 to £23,364, a £8,143 spread on the same certified stone. MOH London lists it at £23,364. 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
K
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
Crown angle34.6°
Pavilion angle41.5°
OriginNatural
Grading LabIGI
CertificateIGI 533209970
Dimensions9.61 × 9.66 × 5.99 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Top View
9.61 mm9.66 mm3.50 ctK / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryVery Good
FluorescenceNone
CertificateIGI 533209970
Side View
Table 61.5%Crown 34.6°Girdle: MED-STKPavilion 41.5°Culet: NoneDepth 62.1%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 5
Current: £23,364 GBP|Low: £15,033 GBP|High: £23,709 GBP|Avg: £17,254 GBP|-1.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 6, 2026
Retailer 10£15,033 GBP
Retailer 8£15,222 GBP
Retailer 6£15,417 GBP
Retailer 9£16,040 GBP
Retailer 5£16,535 GBP
Retailer 7£16,558 GBP
Retailer 3£16,561 GBP
Retailer 4£18,081 GBP
Retailer 2£19,310 GBP
MOH London£23,364 GBP

18 data points across 10 retailers

22 retailers£15,222 GBP to £23,364 GBP

A
Cheapest Retailer
-
£15,222 GBP
A
Retailer 2
-
£15,417 GBP
View
B+
Retailer 3
-
£16,535 GBP
View
Retailer 4
-
£16,558 GBP
View
Price last confirmed 21 days ago
Retailer 5
-
£16,558 GBP
View
Price last confirmed 8 days ago
Retailer 6
-
£16,558 GBP
View
Price last confirmed 12 days ago
A
Retailer 7
-
£16,561 GBP
View
B+
Retailer 8
-
£17,385 GBP
View
Retailer 9
-
£17,385 GBP
View
Price last confirmed 22 days ago
Retailer 10
-
£17,385 GBP
View
Price last confirmed 12 days ago
Retailer 11
-
£17,385 GBP
View
Price last confirmed 8 days ago
Retailer 12
-
£17,937 GBP
View
Price last confirmed 27 days ago
Retailer 13
-
£17,937 GBP
View
Price last confirmed 8 days ago
Retailer 14
-
£17,937 GBP
View
Price last confirmed 23 days ago
B+
Retailer 15
-
£18,081 GBP
View
Retailer 16
-
£18,627 GBP
View
Price last confirmed 24 days ago
B+
Retailer 17
-
£18,627 GBP
View
Retailer 18
-
£18,627 GBP
View
Price last confirmed 16 days ago
B+
Retailer 19
-
£19,310 GBP
View
Retailer 20
-
£21,250 GBP
View
Price last confirmed 23 days ago
Retailer 21
-
£21,250 GBP
View
Price last confirmed 17 days ago
Most Expensive
B
MOH London
18017C5BC · Nov 4
£23,364 GBP
View
21 more retailers have this diamond
Prices start from £15,222 GBPSave up to £8,143 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
£15,222 GBP