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3.30ct I SI1 Round Natural Diamond

EX • I/SI1 • IGI 683598440

Shape and cutting style on the report: Round brilliant

Certificate IGI 683598440

Diamond specifications and retailer prices

From £18,046 GBP
$24,180 USD
As of October 30, 2026
Save £10,210 GBP (36%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £28,256 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 3.3ct natural round diamond

This 3.3ct 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 IGI 683598440. Listed at 14 retailers as of October 29, 2026, with prices from £18,046 to £28,256, a £10,210 spread on the same certified stone. MOH London lists it at £28,256. 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

3.30
Carat
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle31.6°
Pavilion angle41.4°
OriginNatural
Grading LabIGI
CertificateIGI 683598440
Dimensions9.58 × 9.61 × 5.81 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Top View
9.58 mm9.61 mm3.30 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI 683598440
Side View
Table 61.0%Crown 31.6°Girdle: MED-STKPavilion 41.4°Culet: NoneDepth 60.6%

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: £28,256 GBP|Low: £18,046 GBP|High: £28,444 GBP|Avg: £21,393 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
Retailer 12
Retailer 13
Retailer 14
October 30, 2026
Retailer 14£18,046 GBP
Retailer 6£18,085 GBP
Retailer 8£18,431 GBP
Retailer 12£19,036 GBP
Retailer 5£19,330 GBP
Retailer 11£19,864 GBP
Retailer 10£20,857 GBP
Retailer 7£21,140 GBP
Retailer 13£21,519 GBP
Retailer 2£21,914 GBP
Retailer 4£22,347 GBP
Retailer 9£23,205 GBP
Retailer 3£25,494 GBP
MOH London£28,256 GBP

40 data points across 14 retailers

14 retailers£18,046 GBP to £28,256 GBP

A
Cheapest Retailer
-
£18,046 GBP
$24,180 USD
A
Retailer 2
-
£18,085 GBP
$24,232 USD
View
A
Retailer 3
-
£18,431 GBP
View
A
Retailer 4
-
£19,036 GBP
$25,506 USD
View
Final sale: no returns
A
Retailer 5
-
£19,330 GBP
$25,900 USD
View
A
Retailer 6
-
£19,864 GBP
$26,615 USD
View
A
Retailer 7
-
£20,857 GBP
$27,946 USD
View
A
Retailer 8
-
£21,140 GBP
€26,977 EUR
View
B+
Retailer 9
-
£21,519 GBP
$28,833 USD
View
A
Retailer 10
-
£21,914 GBP
View
B+
Retailer 11
-
£22,347 GBP
$29,942 USD
View
B+
Retailer 12
-
£23,205 GBP
ZAR 502,290 ZAR
View
B+
Retailer 13
-
£25,494 GBP
$34,159 USD
View
Most Expensive
B
MOH London
D4353BCF9 · Oct 29
£28,256 GBP
View
13 more retailers have this diamond
Prices start from £18,046 GBPSave up to £10,210 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
3.30ct Round
£18,046 GBP