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Asscher|Lab Grown|IGI

4.51ct E SI1 Asscher Lab Grown Diamond

ID • E/SI1 • IGI LG685582274

Shape and cutting style on the report: Square emerald cut

Certificate IGI LG685582274

Diamond specifications and retailer prices

From £361 GBP
As of October 30, 2026
Save £1,491 GBP (80%) vs most expensive(unlock to see where)
7 retailers carry this diamond
Most expensive: £1,852 GBP at Diamond Quarter · As of October 29, 2026
View at Diamond Quarter

About this 4.51ct lab-grown asscher diamond

This 4.51ct lab-grown asscher sits in the three to five carat band, graded E colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG685582274 or 685582274. Listed at 7 retailers as of October 29, 2026, with prices from £361 to £1,852, a £1,491 spread on the same certified stone. Diamond Quarter lists it at £1,852. 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

4.51
Carat
E
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle38.4°
Pavilion angle40.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG685582274
Dimensions9.16 × 9.13 × 5.96 mm
L/W Ratio1.00
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.16 mm9.13 mm4.51 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG685582274
Side View
Table 67.0%Crown 38.4°Girdle: MED-STKPavilion 40.4°Culet: NoneDepth 65.3%

Caratlytics Score

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

Price History

Last verified: Oct 30
Current: £361 GBP|Low: £361 GBP|High: £5,515 GBP|Avg: £1,851 GBP|-0.2%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 30, 2026
Retailer 1£361 GBP
Retailer 6£478 GBP
Retailer 4£537 GBP
Retailer 7£675 GBP
Retailer 5£700 GBP
Retailer 3£713 GBP
Retailer 8£1,040 GBP
Retailer 2£3,745 GBP
Retailer 10£4,080 GBP
Retailer 9£5,515 GBP

3 data points across 10 retailers

7 retailers£361 GBP to £1,852 GBP

A
Cheapest Retailer
-
£361 GBP
A
Retailer 2
-
£478 GBP
HK$5,000 HKD
View
A
Retailer 3
-
£537 GBP
$720 USD
View
B+
Retailer 4
-
£675 GBP
$904 USD
View
A
Retailer 5
-
£700 GBP
$938 USD
View
A
Retailer 6
-
£713 GBP
View
Most Expensive
B
Diamond Quarter
4.51SI1ELG74D48AN · Oct 29
£1,852 GBP
View
6 more retailers have this diamond
Prices start from £361 GBPSave up to £1,491 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
4.51ct Asscher
£361 GBP