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Asscher|Lab Grown|IGI

1.64ct E SI1 Asscher Lab Grown Diamond

ID • E/SI1 • IGI LG519228955

Shape and cutting style on the report: Square emerald cut

Certificate IGI LG519228955

Diamond specifications and retailer prices

From £262 GBP
As of November 6, 2026
Save £601 GBP (70%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £862 GBP at MOH London · As of November 2, 2026
View at MOH London

About this 1.64ct lab-grown asscher diamond

This 1.64ct lab-grown asscher 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 LG519228955 or 519228955. Listed at 4 retailers as of November 2, 2026, with prices from £262 to £862, a £601 spread on the same certified stone. MOH London lists it at £862. 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

1.64
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle25°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG519228955
Dimensions6.45 × 6.44 × 4.35 mm
L/W Ratio1.00
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
6.45 mm6.44 mm1.64 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG519228955
Side View
Table 63.0%Crown 25°Girdle: MediumPavilion 40.6°Culet: NoneDepth 67.5%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 6
Current: £862 GBP|Low: £262 GBP|High: £1,021 GBP|Avg: £549 GBP|-14.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 6, 2026
Retailer 3£262 GBP
Retailer 2£402 GBP
Retailer 5£406 GBP
Retailer 4£819 GBP
MOH London£862 GBP

36 data points across 5 retailers

4 retailers£262 GBP to £862 GBP

B+
Cheapest Retailer
-
£262 GBP
A
Retailer 2
-
£402 GBP
View
B
Retailer 3
-
£819 GBP
View
Most Expensive
B
MOH London
LG519228955 · Nov 2
£862 GBP
View
3 more retailers have this diamond
Prices start from £262 GBPSave up to £601 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
1.64ct Asscher
£262 GBP