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0.31ct D SI1 Round Lab Grown Diamond

EX • D/SI1 • IGI LG586383045

Shape and cutting style on the report: Round brilliant

Certificate IGI LG586383045

Diamond specifications and retailer prices

From £49 GBP
$66 USD
As of October 29, 2026
Save £398 GBP (89%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: £447 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 D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG586383045 or 586383045. Listed at 15 retailers as of October 29, 2026, with prices from £49 to £447, a £398 spread on the same certified stone. MOH London lists it at £447. 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
D
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG586383045
Dimensions4.25 × 4.28 × 2.70 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
4.25 mm4.28 mm0.31 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG586383045
Side View
Table 54.0%Crown 36°Girdle: MediumPavilion 40.6°Culet: NoneDepth 63.3%

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: Oct 29
Current: £447 GBP|Low: £49 GBP|High: £451 GBP|Avg: £161 GBP|+0.2%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 31, 2026
Retailer 5£49 GBP
Retailer 6£57 GBP
Retailer 8£64 GBP
Retailer 2£104 GBP
Retailer 3£126 GBP
Retailer 7£143 GBP
Retailer 4£146 GBP
Retailer 9£241 GBP
MOH London£447 GBP

43 data points across 9 retailers

15 retailers£49 GBP to £447 GBP

A
Cheapest Retailer
-
£49 GBP
$66 USD
Retailer 2
-
£49 GBP
$66 USD
View
Price last confirmed 39 days ago
Retailer 3
-
£57 GBP
$76 USD
View
Price last confirmed 41 days ago
A
Retailer 4
-
£57 GBP
$76 USD
View
A
Retailer 5
-
£64 GBP
$86 USD
View
Retailer 6
-
£64 GBP
$86 USD
View
Price last confirmed 37 days ago
A
Retailer 7
-
£64 GBP
$86 USD
View
A
Retailer 8
-
£104 GBP
View
A
Retailer 9
-
£126 GBP
€161 EUR
View
A
Retailer 10
-
£143 GBP
$191 USD
View
A
Retailer 11
-
£146 GBP
View
Retailer 12
-
£195 GBP
$261 USD
View
Price last confirmed 36 days ago
B+
Retailer 13
-
£195 GBP
$261 USD
View
B
Retailer 14
-
£241 GBP
$322 USD
View
Most Expensive
B
MOH London
LG586383045 · Oct 29
£447 GBP
View
14 more retailers have this diamond
Prices start from £49 GBPSave up to £398 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
£49 GBP