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Asscher|Lab Grown|IGI

1.00ct G SI1 Asscher Lab Grown Diamond

ID • G/SI1 • IGI LG665409323

Shape and cutting style on the report: Square emerald cut

Certificate IGI LG665409323

Diamond specifications and retailer prices

From £156 GBP
As of November 4, 2026
Save £755 GBP (83%) vs most expensive(unlock to see where)
18 retailers carry this diamond
Most expensive: £911 GBP at Reve Diamonds · As of November 6, 2026
View at Reve Diamonds

About this 1ct lab-grown asscher diamond

This 1ct lab-grown asscher sits in the classic one-carat band, graded G colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG665409323 or 665409323. Listed at 18 retailers as of November 4, 2026, with prices from £156 to £911, a £755 spread on the same certified stone. Reve Diamonds lists it at £911. 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
G
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38.6°
Pavilion angle42.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG665409323
Dimensions5.51 × 5.37 × 3.73 mm
L/W Ratio1.03
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 Faint Blue
Top View
5.51 mm5.37 mm1.00 ctG / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG665409323
Side View
Table 66.0%Crown 38.6°Girdle: MED-STKPavilion 42.4°Culet: NoneDepth 69.5%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Nov 4
Current: £354 GBP|Low: £156 GBP|High: £911 GBP|Avg: £424 GBP|+4.6%
Retailer 1
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Reve Diamonds
November 6, 2026
Retailer 9£156 GBP
Retailer 6£175 GBP
Retailer 11£181 GBP
Retailer 4£193 GBP
Retailer 12£193 GBP
Retailer 8£327 GBP
Retailer 5£333 GBP
Retailer 1£354 GBP
Retailer 2£367 GBP
Retailer 16£367 GBP
Retailer 3£368 GBP
Retailer 15£409 GBP
Retailer 13£532 GBP
Retailer 10£622 GBP
Retailer 7£661 GBP
Retailer 14£775 GBP
Reve Diamonds£911 GBP

45 data points across 17 retailers

18 retailers£156 GBP to £911 GBP

A
Cheapest Retailer
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£156 GBP
A
Retailer 2
-
£175 GBP
View
Final sale: no returns
A
Retailer 3
-
£181 GBP
View
A
Retailer 4
-
£193 GBP
View
Retailer 5
-
£193 GBP
View
Price last confirmed 12 days ago
B+
Retailer 6
-
£327 GBP
View
B+
Retailer 7
-
£333 GBP
View
B+
Retailer 8
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£338 GBP
View
B+
Retailer 9
-
£354 GBP
View
Retailer 10
-
£367 GBP
View
Price last confirmed 8 days ago
B+
Retailer 11
-
£367 GBP
View
B+
Retailer 12
-
£368 GBP
View
B+
Retailer 13
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£409 GBP
View
B
Retailer 14
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£532 GBP
View
B
Retailer 15
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£622 GBP
View
B
Retailer 16
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£661 GBP
View
B
Retailer 17
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£775 GBP
View
Most Expensive
B
Reve Diamonds
78EB266E9 · Nov 6
£911 GBP
$1,226 USD
View
17 more retailers have this diamond
Prices start from £156 GBPSave up to £755 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
£156 GBP