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Asscher|Lab Grown|IGI

1.66ct G VS1 Asscher Lab Grown Diamond

GD • G/VS1 • IGI LG592318813

Shape and cutting style on the report: Square emerald cut

Certificate IGI LG592318813

Diamond specifications and retailer prices

From £614 GBP
As of November 2, 2026
2 retailers carry this diamond
Most expensive: £614 GBP at Diamond Quarter
View at Diamond Quarter

About this 1.66ct lab-grown asscher diamond

This 1.66ct lab-grown asscher sits in the one-and-a-half to two carat band, graded G colour (near-colourless) and VS1 clarity (very-slightly-included), with a standard cut grade and certified by IGI LG592318813 or 592318813. Listed at 2 retailers as of November 2, 2026. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

1.66
Carat
G
Colour
VS1
Clarity
Good
Cut

Specifications

CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle40.6°
Pavilion angle44.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG592318813
Dimensions6.51 × 6.50 × 4.39 mm
L/W Ratio1.00
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
6.51 mm6.50 mm1.66 ctG / VS1
OriginLab Grown
CutGood
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG592318813
Side View
Table 65.0%Crown 40.6°Girdle: MediumPavilion 44.3°Culet: NoneDepth 67.5%

Caratlytics Score

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B
Good
Decent quality, room for better deals
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Price History

Last verified: Nov 2
Current: £335 GBP|Low: £107 GBP|High: £1,736 GBP|Avg: £722 GBP|-39.4%
Retailer 1
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Retailer 14
August 6, 2026
Retailer 8£107 GBP
Retailer 7£140 GBP
Retailer 1£335 GBP
Retailer 6£365 GBP
Retailer 10£389 GBP
Retailer 9£435 GBP
Retailer 11£460 GBP
Retailer 2£527 GBP
Retailer 14£716 GBP
Retailer 12£851 GBP
Retailer 4£861 GBP
Retailer 13£886 GBP
Retailer 3£888 GBP
Retailer 5£1,602 GBP

72 data points across 14 retailers

2 retailers

Retailer 1
-
£335 GBP
$449 USD
Price last confirmed 10 days ago
Most Expensive
B
Diamond Quarter
1.66VS1GLG137727N · Nov 2
£614 GBP
View
1 more retailer has this diamond

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
1.66ct Asscher
£614 GBP