Asscher|Lab Grown|IGI

1.78ct F SI2 Asscher Lab Grown Diamond

ID • F/SI2 • IGI LG620447925

Shape and cutting style on the report: Square emerald cut

Certificate IGI LG620447925

Diamond specifications and retailer prices

From £163 GBP
$218 USD
As of October 27, 2026
Save £630 GBP (79%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £896 GBP at MOH London · As of October 21, 2026
View at MOH London

About this 1.78ct lab-grown asscher diamond

This 1.78ct lab-grown asscher sits in the one-and-a-half to two carat band, graded F colour (colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG620447925 or 620447925. Listed at 9 retailers as of October 27, 2026, with a 387% 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

1.78
Carat
F
Colour
SI2
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.2°
Pavilion angle42.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG620447925
Dimensions6.70 × 6.63 × 4.33 mm
L/W Ratio1.01
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
6.70 mm6.63 mm1.78 ctF / SI2
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG620447925
Side View
Table 65.0%Crown 33.2°Girdle: MediumPavilion 42.3°Culet: NoneDepth 65.3%

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: £896 GBP|Low: £163 GBP|High: £951 GBP|Avg: £539 GBP|-5.8%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
October 27, 2026
Retailer 4£163 GBP
Retailer 2£189 GBP
Retailer 5£286 GBP
Retailer 3£309 GBP
Retailer 9£345 GBP
Retailer 11£402 GBP
Retailer 10£603 GBP
Retailer 6£650 GBP
Retailer 7£715 GBP
Retailer 8£896 GBP
MOH London£896 GBP

33 data points across 11 retailers

9 retailers£163 GBP to £793 GBP

A
Cheapest Retailer
-
£163 GBP
$218 USD
A
Retailer 2
-
£189 GBP
$253 USD
View
A
Retailer 3
-
£286 GBP
View
Retailer 4
-
£345 GBP
$462 USD
View
Price last confirmed 6 days ago
B+
Retailer 5
-
£650 GBP
$871 USD
View
B
Retailer 6
-
£715 GBP
$958 USD
View
B+
Retailer 7
-
£793 GBP
View
Retailer 8
-
£896 GBP
$1,200 USD
View
Price last confirmed 7 days ago
Most Expensive
MOH London
LG620447925 · Oct 21
£896 GBP
View
Price last confirmed 11 days ago
8 more retailers have this diamond
Prices start from £163 GBPSave up to £630 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 Asscher
£163 GBP