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Asscher|Lab Grown|IGI

3.51ct D SI1 Asscher Lab Grown Diamond

ID • D/SI1 • IGI LG640447575

Shape and cutting style on the report: Square emerald cut

Certificate IGI LG640447575

Diamond specifications and retailer prices

From £332 GBP
As of November 4, 2026
Save £1,100 GBP (77%) vs most expensive(unlock to see where)
16 retailers carry this diamond
Most expensive: £2,504 GBP at Rare Carat · As of September 28, 2026
View at Rare Carat

About this 3.51ct lab-grown asscher diamond

This 3.51ct lab-grown asscher sits in the three to five carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG640447575 or 640447575. Listed at 16 retailers as of November 5, 2026, with a 331% 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

3.51
Carat
D
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.1°
Pavilion angle33.1°
OriginLab Grown
Grading LabIGI
CertificateIGI LG640447575
Dimensions8.44 × 8.22 × 5.27 mm
L/W Ratio1.03
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
8.44 mm8.22 mm3.51 ctD / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG640447575
Side View
Table 63.0%Crown 36.1°Girdle: MediumPavilion 33.1°Culet: NoneDepth 64.1%

Caratlytics Score

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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: Nov 4
Current: £2,504 GBP|Low: £332 GBP|High: £2,504 GBP|Avg: £892 GBP
Rare Carat
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
Retailer 15
November 6, 2026
Retailer 7£332 GBP
Retailer 11£332 GBP
Retailer 9£368 GBP
Retailer 14£368 GBP
Retailer 5£476 GBP
Retailer 3£494 GBP
Retailer 13£580 GBP
Retailer 2£597 GBP
Retailer 15£607 GBP
Retailer 12£1,031 GBP
Retailer 10£1,181 GBP
Retailer 6£1,208 GBP
Retailer 4£1,358 GBP
Retailer 8£1,432 GBP
Rare Carat£2,504 GBP

46 data points across 15 retailers

16 retailers£332 GBP to £1,432 GBP

A
Cheapest Retailer
-
£332 GBP
Final sale: no returns
A
Retailer 2
-
£332 GBP
View
Retailer 3
-
£368 GBP
View
Price last confirmed 21 days ago
A
Retailer 4
-
£368 GBP
View
A
Retailer 5
-
£476 GBP
View
B+
Retailer 6
-
£494 GBP
View
Retailer 7
-
£580 GBP
View
Price last confirmed 8 days ago
A
Retailer 8
-
£597 GBP
View
A
Retailer 9
-
£607 GBP
View
B+
Retailer 10
-
£1,031 GBP
View
B+
Retailer 11
-
£1,169 GBP
View
B+
Retailer 12
-
£1,181 GBP
View
B+
Retailer 13
-
£1,208 GBP
View
B+
Retailer 14
-
£1,358 GBP
View
B+
Retailer 15
-
£1,432 GBP
View
Most Expensive
Rare Carat
ST-26414_l_640447575 · Sep 28
£2,504 GBP
$3,370 USD
View
Price last confirmed 38 days ago
15 more retailers have this diamond
Prices start from £332 GBPSave up to £1,100 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
3.51ct Asscher
£332 GBP