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Round|Lab Grown|IGI

0.31ct F SI1 Round Lab Grown Diamond

VG • F/SI1 • IGI LG480170746

Shape and cutting style on the report: Round brilliant

Certificate IGI LG480170746

Diamond specifications and retailer prices

From £127 GBP
$170 USD
As of November 1, 2026
Save £612 GBP (83%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £739 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 0.31ct lab-grown round diamond

This 0.31ct lab-grown round sits in the sub-half-carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG480170746 or 480170746. Listed at 11 retailers as of October 29, 2026, with prices from £127 to £739, a £612 spread on the same certified stone. MOH London lists it at £739. 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
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle37°
Pavilion angle41.2°
OriginLab Grown
Grading LabIGI
CertificateIGI LG480170746
Dimensions4.28 × 4.32 × 2.69 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
4.28 mm4.32 mm0.31 ctF / SI1
OriginLab Grown
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG480170746
Side View
Table 60.5%Crown 37°Girdle: MED-STKPavilion 41.2°Culet: NoneDepth 62.6%

Caratlytics Score

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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: £739 GBP|Low: £122 GBP|High: £745 GBP|Avg: £279 GBP|+0.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 1, 2026
Retailer 5£127 GBP
Retailer 8£147 GBP
Retailer 3£157 GBP
Retailer 6£157 GBP
Retailer 9£211 GBP
Retailer 2£277 GBP
Retailer 7£281 GBP
Retailer 4£324 GBP
Retailer 10£353 GBP
MOH London£739 GBP

41 data points across 10 retailers

11 retailers£127 GBP to £739 GBP

A
Cheapest Retailer
-
£127 GBP
$170 USD
B+
Retailer 2
-
£147 GBP
$197 USD
View
B+
Retailer 3
-
£157 GBP
$210 USD
View
Retailer 4
-
£157 GBP
$211 USD
View
Price last confirmed 7 days ago
B+
Retailer 5
-
£157 GBP
$211 USD
View
B
Retailer 6
-
£277 GBP
View
B
Retailer 7
-
£281 GBP
$377 USD
View
B
Retailer 8
-
£324 GBP
€413 EUR
View
B
Retailer 9
-
£366 GBP
View
B
Retailer 10
-
£506 GBP
$678 USD
View
Most Expensive
B
MOH London
LG480170746 · Oct 29
£739 GBP
View
10 more retailers have this diamond
Prices start from £127 GBPSave up to £612 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
£127 GBP