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Asscher|Lab Grown|IGI

1.64ct F SI1 Asscher Lab Grown Diamond

ID • F/SI1 • IGI LG604300107

Shape and cutting style on the report: Square emerald cut

Certificate IGI LG604300107

Diamond specifications and retailer prices

From £809 GBP
As of November 5, 2026
Save £65 GBP (7%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £874 GBP at Brilliant Earth · As of November 6, 2026
View at Brilliant Earth

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 F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG604300107 or 604300107. Listed at 2 retailers as of November 5, 2026, with a relatively tight 8% spread, which is unusual at this carat range and suggests competitive pricing across the listings. 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
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.2°
Pavilion angle41.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG604300107
Dimensions6.44 × 6.41 × 4.22 mm
L/W Ratio1.00
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
6.44 mm6.41 mm1.64 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG604300107
Side View
Table 64.0%Crown 34.2°Girdle: THN-MEDPavilion 41.1°Culet: NoneDepth 65.8%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Nov 5
Current: £874 GBP|Low: £272 GBP|High: £1,345 GBP|Avg: £736 GBP|-35.0%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 30, 2026
Retailer 4£272 GBP
Retailer 2£348 GBP
Retailer 3£530 GBP
Retailer 6£837 GBP
Brilliant Earth£874 GBP
Retailer 5£1,322 GBP

2 data points across 6 retailers

2 retailers£809 GBP to £874 GBP

B
Cheapest Retailer
-
£809 GBP
Most Expensive
B
Brilliant Earth
9239320B · Nov 6
£874 GBP
$1,170 USD
View
1 more retailer has this diamond
Prices start from £809 GBPSave up to £65 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.

B
1.64ct Asscher
£809 GBP