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Asscher|Lab Grown|IGI

1.00ct D SI1 Asscher Lab Grown Diamond

ID • D/SI1 • IGI LG838660979

Shape and cutting style on the report: Square emerald cut

Certificate IGI LG838660979

Diamond specifications and retailer prices

From £122 GBP
As of November 4, 2026
Save £391 GBP (76%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £707 GBP at MOH London · As of October 26, 2026
View at MOH London

About this 1ct lab-grown asscher diamond

This 1ct lab-grown asscher sits in the classic one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG838660979 or 838660979. Listed at 9 retailers as of November 4, 2026, with a 321% 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

1.00
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.8°
Pavilion angle39.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG838660979
Dimensions5.43 × 5.40 × 3.74 mm
L/W Ratio1.01
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
5.43 mm5.40 mm1.00 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG838660979
Side View
Table 60.0%Crown 34.8°Girdle: ThickPavilion 39.9°Culet: NoneDepth 69.3%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: £707 GBP|Low: £117 GBP|High: £714 GBP|Avg: £366 GBP|-0.9%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
October 25, 2026
Retailer 4£122 GBP
Retailer 9£141 GBP
Retailer 2£171 GBP
Retailer 8£272 GBP
Retailer 6£375 GBP
Retailer 5£414 GBP
Retailer 7£485 GBP
Retailer 3£513 GBP
MOH London£707 GBP

15 data points across 9 retailers

9 retailers£122 GBP to £513 GBP

A
Cheapest Retailer
-
£122 GBP
A
Retailer 2
-
£141 GBP
View
A
Retailer 3
-
£171 GBP
View
B+
Retailer 4
-
£272 GBP
View
B
Retailer 5
-
£375 GBP
View
B+
Retailer 6
-
£414 GBP
View
B
Retailer 7
-
£485 GBP
View
B
Retailer 8
-
£513 GBP
View
Most Expensive
MOH London
LG838660979 · Oct 26
£707 GBP
View
Price last confirmed 10 days ago
8 more retailers have this diamond
Prices start from £122 GBPSave up to £391 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
1.00ct Asscher
£122 GBP