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Round|Lab Grown|IGI

0.31ct D SI1 Round Lab Grown Diamond

EX • D/SI1 • IGI LG462133231

Shape and cutting style on the report: Round brilliant

Certificate IGI LG462133231

Diamond specifications and retailer prices

From £141 GBP
$189 USD
As of October 29, 2026
Save £419 GBP (75%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £817 GBP at MOH London · As of October 26, 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 LG462133231 or 462133231. Listed at 10 retailers as of October 29, 2026, with a 297% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. 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 angle36.5°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG462133231
Dimensions4.32 × 4.30 × 2.66 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
4.32 mm4.30 mm0.31 ctD / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG462133231
Side View
Table 60.0%Crown 36.5°Girdle: MED-STKPavilion 40.8°Culet: NoneDepth 61.7%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 29
Current: £817 GBP|Low: £135 GBP|High: £826 GBP|Avg: £309 GBP|+0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 31, 2026
Retailer 4£141 GBP
Retailer 9£163 GBP
Retailer 5£175 GBP
Retailer 8£175 GBP
Retailer 10£179 GBP
Retailer 6£307 GBP
Retailer 3£316 GBP
Retailer 2£350 GBP
Retailer 7£560 GBP
MOH London£817 GBP

41 data points across 10 retailers

10 retailers£141 GBP to £560 GBP

A
Cheapest Retailer
-
£141 GBP
$189 USD
B+
Retailer 2
-
£163 GBP
$219 USD
View
B+
Retailer 3
-
£175 GBP
$234 USD
View
B+
Retailer 4
-
£175 GBP
$234 USD
View
B+
Retailer 5
-
£179 GBP
$240 USD
View
B
Retailer 6
-
£307 GBP
$411 USD
View
B
Retailer 7
-
£316 GBP
View
B
Retailer 8
-
£350 GBP
€446 EUR
View
B
Retailer 9
-
£560 GBP
$751 USD
View
Most Expensive
MOH London
LG462133231 · Oct 26
£817 GBP
View
Price under review
9 more retailers have this diamond
Prices start from £141 GBPSave up to £419 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
£141 GBP