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Oval|Lab Grown|IGI

1.78ct E SI1 Oval Lab Grown Diamond

EX • E/SI1 • IGI LG845698384

Shape and cutting style on the report: Oval brilliant

Certificate IGI LG845698384

Diamond specifications and retailer prices

From £181 GBP
$241 USD
As of October 27, 2026
Save £599 GBP (77%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £780 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 1.78ct lab-grown oval diamond

This 1.78ct 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 LG845698384 or 845698384. Listed at 5 retailers as of October 27, 2026, with prices from £181 to £780, a £599 spread on the same certified stone. MOH London lists it at £780. 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

1.78
Carat
E
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.8°
Pavilion angle41°
OriginLab Grown
Grading LabIGI
CertificateIGI LG845698384
Dimensions9.64 × 6.94 × 4.32 mm
L/W Ratio1.39
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.64 mm6.94 mm1.78 ctE / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG845698384
Side View
Table 59.0%Crown 35.8°Girdle: MED-STKPavilion 41°Culet: NoneDepth 62.2%

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: Oct 27
Current: £780 GBP|Low: £181 GBP|High: £780 GBP|Avg: £478 GBP|+0.4%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
October 29, 2026
Retailer 4£181 GBP
Retailer 2£249 GBP
Retailer 5£450 GBP
Retailer 3£623 GBP
MOH London£780 GBP

5 data points across 5 retailers

5 retailers£181 GBP to £780 GBP

A
Cheapest Retailer
-
£181 GBP
$241 USD
A
Retailer 2
-
£249 GBP
View
B+
Retailer 3
-
£450 GBP
$599 USD
View
B+
Retailer 4
-
£623 GBP
$829 USD
View
Most Expensive
B
MOH London
LG845698384 · Oct 29
£780 GBP
View
4 more retailers have this diamond
Prices start from £181 GBPSave up to £599 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
1.78ct Oval
£181 GBP