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Asscher|Lab Grown|IGI

4.51ct E SI1 Asscher Lab Grown Diamond

ID • E/SI1 • IGI LG719576944

Shape and cutting style on the report: Square emerald cut

Certificate IGI LG719576944

Diamond specifications and retailer prices

From £1,099 GBP
HK$11,500 HKD
As of October 30, 2026
Save £2,079 GBP (65%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £3,177 GBP at Michael Trio · As of October 31, 2026
View at Michael Trio

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 LG719576944 or 719576944. Listed at 5 retailers as of October 30, 2026, with prices from £1,099 to £3,177, a £2,079 spread on the same certified stone. Michael Trio lists it at £3,177. 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 angle38.1°
Pavilion angle40.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG719576944
Dimensions8.92 × 8.91 × 6.01 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
8.92 mm8.91 mm4.51 ctE / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG719576944
Side View
Table 67.0%Crown 38.1°Girdle: ThickPavilion 40.4°Culet: NoneDepth 67.5%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 30
Current: £3,177 GBP|Low: £1,053 GBP|High: £5,269 GBP|Avg: £3,284 GBP|-14.1%
Michael Trio
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
October 30, 2026
Retailer 4£1,099 GBP
Retailer 5£1,099 GBP
Retailer 3£1,375 GBP
Retailer 2£3,127 GBP
Michael Trio£3,177 GBP
Retailer 6£4,247 GBP
Retailer 7£5,097 GBP
Retailer 8£5,097 GBP

16 data points across 8 retailers

5 retailers£1,099 GBP to £3,177 GBP

B+
Cheapest Retailer
-
£1,099 GBP
HK$11,500 HKD
B+
Retailer 2
-
£1,099 GBP
$1,473 USD
View
B+
Retailer 3
-
£1,375 GBP
€1,755 EUR
View
B
Retailer 4
-
£3,127 GBP
$4,190 USD
View
Most Expensive
B
Michael Trio
8234432100 · Oct 31
£3,177 GBP
SGD 5,753 SGD
View
4 more retailers have this diamond
Prices start from £1,099 GBPSave up to £2,079 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+
4.51ct Asscher
£1,099 GBP