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Round|Natural|IGI

0.31ct F I1 Round Natural Diamond

VG • F/I1 • IGI 485165849

Shape and cutting style on the report: Round brilliant

Certificate IGI 485165849

Diamond specifications and retailer prices

From £154 GBP
$206 USD
As of October 31, 2026
Save £541 GBP (78%) vs most expensive(unlock to see where)
8 retailers carry this diamond
Most expensive: £695 GBP at NZ Jewellers · As of November 2, 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 F colour (colourless) and I1 clarity (included), with a very-good cut grade and certified by IGI 485165849. Listed at 8 retailers as of October 31, 2026, with prices from £154 to £695, a £541 spread on the same certified stone. NZ Jewellers lists it at £695. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

0.31
Carat
F
Colour
I1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishGood
SymmetryVery Good
FluorescenceNone
Crown angle37.4°
Pavilion angle40.5°
OriginNatural
Grading LabIGI
CertificateIGI 485165849
Dimensions4.26 × 4.28 × 2.69 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
4.26 mm4.28 mm0.31 ctF / I1
OriginNatural
CutVery Good
PolishGood
SymmetryVery Good
FluorescenceNone
CertificateIGI 485165849
Side View
Table 57.5%Crown 37.4°Girdle: UNDPavilion 40.5°Culet: NoneDepth 63.1%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: £268 GBP|Low: £154 GBP|High: £270 GBP|Avg: £213 GBP|+3.3%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
November 1, 2026
Retailer 2£155 GBP
Retailer 3£201 GBP
Retailer 4£232 GBP
Retailer 1£268 GBP

14 data points across 4 retailers

8 retailers£154 GBP to £695 GBP

B+
Cheapest Retailer
-
£154 GBP
$206 USD
B+
Retailer 2
-
£165 GBP
$221 USD
View
B+
Retailer 3
-
£171 GBP
$229 USD
View
Retailer 4
-
£196 GBP
$262 USD
View
Price last confirmed 7 days ago
B+
Retailer 5
-
£201 GBP
$270 USD
View
B+
Retailer 6
-
£207 GBP
$277 USD
View
B
Retailer 7
-
£268 GBP
€342 EUR
View
Most Expensive
C
NZ Jewellers
aa2c7983-d02a-4e31-b1cb-5b569127e32e · Nov 2
£695 GBP
$931 USD
View
7 more retailers have this diamond
Prices start from £154 GBPSave up to £541 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.

B+
0.31ct Round
£154 GBP