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Oval|Lab Grown|IGI

1.51ct E SI1 Oval Lab Grown Diamond

ID • E/SI1 • IGI LG831691641

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG831691641

Diamond specifications and retailer prices

From £305 GBP
As of November 6, 2026
Save £548 GBP (64%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £853 GBP at MOH London · As of November 5, 2026
View at MOH London

About this 1.51ct lab-grown oval diamond

This 1.51ct lab-grown oval sits in the one-and-a-half to two carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG831691641 or 831691641. Listed at 7 retailers as of November 5, 2026, with prices from £305 to £853, a £548 spread on the same certified stone. MOH London lists it at £853. 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

1.51
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.3°
Pavilion angle42.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG831691641
Dimensions9.00 × 6.48 × 4.13 mm
L/W Ratio1.39
Girdle conditionFaceted
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
9.00 mm6.48 mm1.51 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG831691641
Side View
Table 64.0%Crown 35.3°Girdle: MED-STKPavilion 42.7°Culet: NoneDepth 63.7%

Caratlytics Score

How it works →
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 6
Current: £853 GBP|Low: £305 GBP|High: £861 GBP|Avg: £523 GBP|-0.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
November 6, 2026
Retailer 2£305 GBP
Retailer 6£318 GBP
Retailer 3£331 GBP
Retailer 4£339 GBP
Retailer 5£628 GBP
Retailer 7£770 GBP
MOH London£853 GBP

14 data points across 7 retailers

7 retailers£305 GBP to £853 GBP

A
Cheapest Retailer
-
£305 GBP
B+
Retailer 2
-
£318 GBP
View
A
Retailer 3
-
£331 GBP
View
A
Retailer 4
-
£339 GBP
View
B+
Retailer 5
-
£628 GBP
View
B
Retailer 6
-
£770 GBP
View
Most Expensive
B
MOH London
LG831691641 · Nov 5
£853 GBP
View
6 more retailers have this diamond
Prices start from £305 GBPSave up to £548 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
1.51ct Oval
£305 GBP