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Asscher|Lab Grown|IGI

1.28ct D SI1 Asscher Lab Grown Diamond

ID • D/SI1 • IGI LG793632548

Shape and cutting style on the report: Square emerald cut

Certificate IGI LG793632548

Diamond specifications and retailer prices

From £141 GBP
As of November 4, 2026
Save £646 GBP (82%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £788 GBP at Brilliant Earth · As of November 5, 2026
View at Brilliant Earth

About this 1.28ct lab-grown asscher diamond

This 1.28ct lab-grown asscher sits in the one-and-a-quarter to one-and-a-half carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG793632548 or 793632548. Listed at 9 retailers as of November 4, 2026, with prices from £141 to £788, a £646 spread on the same certified stone. Brilliant Earth lists it at £788. 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

1.28
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle31.4°
Pavilion angle42.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG793632548
Dimensions6.00 × 5.99 × 3.84 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
6.00 mm5.99 mm1.28 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG793632548
Side View
Table 60.0%Crown 31.4°Girdle: MediumPavilion 42.6°Culet: NoneDepth 64.1%

Caratlytics Score

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

Last verified: Nov 4
Current: £788 GBP|Low: £138 GBP|High: £981 GBP|Avg: £468 GBP|-19.7%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
November 5, 2026
Retailer 7£141 GBP
Retailer 6£264 GBP
Retailer 8£274 GBP
Retailer 4£282 GBP
Retailer 5£334 GBP
Retailer 2£401 GBP
Retailer 9£536 GBP
Retailer 3£680 GBP
Brilliant Earth£788 GBP
Retailer 10£836 GBP

26 data points across 10 retailers

9 retailers£141 GBP to £788 GBP

A
Cheapest Retailer
-
£141 GBP
Final sale: no returns
Retailer 2
-
£146 GBP
View
Price last confirmed 42 days ago
B+
Retailer 3
-
£264 GBP
View
Retailer 4
-
£282 GBP
View
Price last confirmed 12 days ago
B+
Retailer 5
-
£334 GBP
View
B+
Retailer 6
-
£401 GBP
View
B
Retailer 7
-
£661 GBP
View
B
Retailer 8
-
£680 GBP
View
Most Expensive
B
Brilliant Earth
18959383A · Nov 5
£788 GBP
$1,060 USD
View
8 more retailers have this diamond
Prices start from £141 GBPSave up to £646 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
1.28ct Asscher
£141 GBP