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0.31ct I SI1 Round Natural Diamond

EX • I/SI1 • IGI 146452203

Shape and cutting style on the report: Round brilliant

Certificate IGI 146452203

Diamond specifications and retailer prices

From £106 GBP
₹13,580 INR
As of November 1, 2026
Save £602 GBP (85%) vs most expensive(unlock to see where)
24 retailers carry this diamond
Most expensive: £708 GBP at NZ Jewellers · As of October 26, 2026
View at NZ Jewellers

About this 0.31ct natural round diamond

This 0.31ct natural round sits in the sub-half-carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI 146452203. Listed at 24 retailers as of October 26, 2026, with prices from £106 to £708, a £602 spread on the same certified stone. NZ Jewellers lists it at £708. 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

0.31
Carat
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
Crown angle34.3°
Pavilion angle41.1°
OriginNatural
Grading LabIGI
CertificateIGI 146452203
Dimensions4.39 × 4.46 × 2.65 mm
L/W Ratio1.02
Girdle conditionFaceted
Culet sizePointed
Top View
4.39 mm4.46 mm0.31 ctI / SI1
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceFaint
CertificateIGI 146452203
Side View
Table 61.5%Crown 34.3°Girdle: MediumPavilion 41.1°Culet: NoneDepth 60.1%

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 1
Current: £106 GBP|Low: £106 GBP|High: £366 GBP|Avg: £228 GBP|-4.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 1, 2026
Retailer 1£106 GBP
Retailer 8£159 GBP
Retailer 4£169 GBP
Retailer 9£201 GBP
Retailer 6£242 GBP
Retailer 3£243 GBP
Retailer 7£312 GBP
Retailer 5£319 GBP
Retailer 2£361 GBP

43 data points across 9 retailers

24 retailers£106 GBP to £708 GBP

A
Cheapest Retailer
-
£106 GBP
₹13,580 INR
Retailer 2
-
£157 GBP
$210 USD
View
Price last confirmed 57 days ago
Retailer 3
-
£157 GBP
$210 USD
View
Price last confirmed 45 days ago
Retailer 4
-
£157 GBP
$210 USD
View
Price last confirmed 24 days ago
A
Retailer 5
-
£157 GBP
$210 USD
View
A
Retailer 6
-
£157 GBP
$210 USD
View
Retailer 7
-
£168 GBP
$225 USD
View
Price last confirmed 38 days ago
A
Retailer 8
-
£169 GBP
$226 USD
View
Retailer 9
-
£175 GBP
$234 USD
View
Price last confirmed 33 days ago
A
Retailer 10
-
£175 GBP
$234 USD
View
Retailer 11
-
£201 GBP
$270 USD
View
Price last confirmed 15 days ago
Retailer 12
-
£210 GBP
$282 USD
View
Price last confirmed 55 days ago
Retailer 13
-
£210 GBP
$282 USD
View
Price last confirmed 44 days ago
Retailer 14
-
£210 GBP
$282 USD
View
Price last confirmed 9 days ago
A
Retailer 15
-
£210 GBP
$282 USD
View
A
Retailer 16
-
£242 GBP
ZAR 5,237 ZAR
View
Price last confirmed 7 days ago
B+
Retailer 17
-
£243 GBP
View
B+
Retailer 18
-
£253 GBP
$340 USD
View
B+
Retailer 19
-
£312 GBP
$418 USD
View
B+
Retailer 20
-
£319 GBP
€407 EUR
View
B+
Retailer 21
-
£361 GBP
View
Retailer 22
-
£708 GBP
$949 USD
View
Price last confirmed 56 days ago
Retailer 23
-
£708 GBP
$949 USD
View
Price last confirmed 44 days ago
Most Expensive
B
NZ Jewellers
f994a225-7a28-4c6d-aed1-513066c0ab63 · Oct 26
£708 GBP
$949 USD
View
23 more retailers have this diamond
Prices start from £106 GBPSave up to £602 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
0.31ct Round
£106 GBP