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Round|Lab Grown|IGI

0.31ct D SI1 Round Lab Grown Diamond

ID • D/SI1 • IGI LG788632187

Shape and cutting style on the report: Round brilliant

Certificate IGI LG788632187

Diamond specifications and retailer prices

From £50 GBP
$67 USD
As of September 22, 2026
16 retailers carry this diamond
Most expensive: £538 GBP at MOH London · As of October 21, 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 LG788632187 or 788632187. Listed at 16 retailers as of September 22, 2026. 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
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.3°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG788632187
Dimensions4.38 × 4.42 × 2.61 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
4.38 mm4.42 mm0.31 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG788632187
Side View
Table 60.0%Crown 33.3°Girdle: MediumPavilion 40.7°Culet: NoneDepth 59.5%

Caratlytics Score

No score right now
No retailer has confirmed this stone recently, so we are not scoring it. Prices below are as of the date shown.

Price History

Last verified: Sep 22
Current: £538 GBP|Low: £60 GBP|High: £541 GBP|Avg: £158 GBP|+17.4%
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
Retailer 15
October 23, 2026
Retailer 15£60 GBP
Retailer 13£62 GBP
Retailer 6£66 GBP
Retailer 14£96 GBP
Retailer 12£103 GBP
Retailer 8£104 GBP
Retailer 3£112 GBP
Retailer 2£118 GBP
Retailer 9£137 GBP
Retailer 11£141 GBP
Retailer 4£142 GBP
Retailer 7£155 GBP
Retailer 5£167 GBP
Retailer 10£357 GBP
MOH London£538 GBP

28 data points across 15 retailers

16 retailers£50 GBP to £538 GBP

Retailer 1
-
£50 GBP
$67 USD
Price last confirmed 39 days ago
Retailer 2
-
£58 GBP
$78 USD
View
Price last confirmed 41 days ago
Retailer 3
-
£62 GBP
$83 USD
View
Price last confirmed 11 days ago
Retailer 4
-
£66 GBP
$88 USD
View
Price last confirmed 39 days ago
Retailer 5
-
£70 GBP
$94 USD
View
Price last confirmed 15 days ago
Retailer 6
-
£96 GBP
$128 USD
View
Price last confirmed 10 days ago
Retailer 7
-
£103 GBP
$138 USD
View
Price last confirmed 9 days ago
Retailer 8
-
£104 GBP
View
Price last confirmed 10 days ago
Retailer 9
-
£112 GBP
$150 USD
View
Price last confirmed 10 days ago
Retailer 10
-
£118 GBP
View
Price last confirmed 8 days ago
Retailer 11
-
£137 GBP
€175 EUR
View
Price last confirmed 7 days ago
Retailer 12
-
£141 GBP
CA$263 CAD
View
Price last confirmed 8 days ago
Retailer 13
-
£142 GBP
$190 USD
View
Price last confirmed 10 days ago
Retailer 14
-
£201 GBP
$269 USD
View
Price last confirmed 40 days ago
Retailer 15
-
£357 GBP
$479 USD
View
Price last confirmed 10 days ago
Most Expensive
MOH London
LG788632187 · Oct 21
£538 GBP
View
Price last confirmed 10 days ago
15 more retailers have this diamond

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.

0.31ct Round
£50 GBP