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Round|Lab Grown|IGI

0.31ct D SI1 Round Lab Grown Diamond

EX • D/SI1 • IGI LG677530369

Shape and cutting style on the report: Round brilliant

Certificate IGI LG677530369

Diamond specifications and retailer prices

From £57 GBP
$76 USD
As of October 29, 2026
Save £465 GBP (89%) vs most expensive(unlock to see where)
17 retailers carry this diamond
Most expensive: £521 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 LG677530369 or 677530369. Listed at 17 retailers as of October 29, 2026, with prices from £57 to £521, a £465 spread on the same certified stone. MOH London lists it at £521. 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 angle34.6°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG677530369
Dimensions4.36 × 4.34 × 2.62 mm
L/W Ratio1.00
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
4.36 mm4.34 mm0.31 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG677530369
Side View
Table 61.0%Crown 34.6°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 60.3%

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: £521 GBP|Low: £45 GBP|High: £521 GBP|Avg: £172 GBP|+1.1%
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
October 31, 2026
Retailer 13£57 GBP
Retailer 5£63 GBP
Retailer 7£66 GBP
Retailer 9£75 GBP
Retailer 10£75 GBP
Retailer 6£133 GBP
Retailer 2£152 GBP
Retailer 4£157 GBP
Retailer 3£164 GBP
Retailer 12£227 GBP
Retailer 8£240 GBP
Retailer 11£272 GBP
MOH London£521 GBP

41 data points across 13 retailers

17 retailers£57 GBP to £521 GBP

A
Cheapest Retailer
-
£57 GBP
$76 USD
Retailer 2
-
£57 GBP
$76 USD
View
Price last confirmed 40 days ago
A
Retailer 3
-
£63 GBP
$85 USD
View
Final sale: no returns
Retailer 4
-
£66 GBP
$88 USD
View
Price last confirmed 42 days ago
A
Retailer 5
-
£66 GBP
$88 USD
View
Retailer 6
-
£74 GBP
$99 USD
View
Price last confirmed 40 days ago
A
Retailer 7
-
£75 GBP
$101 USD
View
A
Retailer 8
-
£75 GBP
$101 USD
View
A
Retailer 9
-
£133 GBP
View
B+
Retailer 10
-
£152 GBP
€194 EUR
View
B+
Retailer 11
-
£157 GBP
$211 USD
View
Retailer 12
-
£164 GBP
$220 USD
View
Price last confirmed 19 days ago
Retailer 13
-
£225 GBP
$302 USD
View
Price last confirmed 41 days ago
B+
Retailer 14
-
£227 GBP
$304 USD
View
B
Retailer 15
-
£240 GBP
$321 USD
View
B
Retailer 16
-
£272 GBP
$364 USD
View
Most Expensive
B
MOH London
LG677530369 · Oct 29
£521 GBP
View
16 more retailers have this diamond
Prices start from £57 GBPSave up to £465 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
£57 GBP