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Asscher|Lab Grown|IGI

1.51ct D SI1 Asscher Lab Grown Diamond

ID • D/SI1 • IGI LG508156793

Shape and cutting style on the report: Square emerald cut

Certificate IGI LG508156793

Diamond specifications and retailer prices

From £284 GBP
$381 USD
As of November 1, 2026
Save £598 GBP (68%) vs most expensive(unlock to see where)
4 retailers carry this diamond
Most expensive: £980 GBP at MOH London · As of October 18, 2026
View at MOH London

About this 1.51ct lab-grown asscher diamond

This 1.51ct lab-grown asscher sits in the one-and-a-half to two carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG508156793 or 508156793. Listed at 4 retailers as of October 31, 2026, with a 210% 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

1.51
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle22.2°
Pavilion angle40°
OriginLab Grown
Grading LabIGI
CertificateIGI LG508156793
Dimensions6.36 × 6.22 × 4.08 mm
L/W Ratio1.02
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
6.36 mm6.22 mm1.51 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG508156793
Side View
Table 58.0%Crown 22.2°Girdle: ThickPavilion 40°Culet: NoneDepth 65.6%

Caratlytics Score

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B+
Very Good
Strong quality and value balance
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Price History

Last verified: Nov 1
Current: £980 GBP|Low: £284 GBP|High: £987 GBP|Avg: £598 GBP|+0.6%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
November 1, 2026
Retailer 4£284 GBP
Retailer 5£396 GBP
Retailer 2£448 GBP
Retailer 3£882 GBP
MOH London£980 GBP

37 data points across 5 retailers

4 retailers£284 GBP to £882 GBP

B+
Cheapest Retailer
-
£284 GBP
$381 USD
B+
Retailer 2
-
£448 GBP
View
B
Retailer 3
-
£882 GBP
$1,182 USD
View
Most Expensive
MOH London
LG508156793 · Oct 18
£980 GBP
View
Price last confirmed 14 days ago
3 more retailers have this diamond
Prices start from £284 GBPSave up to £598 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+
1.51ct Asscher
£284 GBP