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Round|Lab Grown|IGI

3.54ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG620450105

Shape and cutting style on the report: Round brilliant

Certificate IGI LG620450105

Diamond specifications and retailer prices

From £305 GBP
$408 USD
As of October 26, 2026
Save £2,397 GBP (89%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £2,702 GBP at Do Amore Diamonds · As of October 29, 2026
View at Do Amore Diamonds

About this 3.54ct lab-grown round diamond

This 3.54ct lab-grown round sits in the three to five carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG620450105 or 620450105. Listed at 9 retailers as of October 26, 2026, with prices from £305 to £2,702, a £2,397 spread on the same certified stone. Do Amore Diamonds lists it at £2,702. 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

3.54
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.6°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG620450105
Dimensions9.75 × 9.70 × 5.99 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
9.75 mm9.70 mm3.54 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG620450105
Side View
Table 57.0%Crown 34.6°Girdle: MED-STKPavilion 40.6°Culet: NoneDepth 61.6%

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: Oct 26
Current: £2,702 GBP|Low: £252 GBP|High: £3,418 GBP|Avg: £1,191 GBP|-3.5%
Do Amore Diamonds
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
October 29, 2026
Retailer 14£305 GBP
Retailer 9£341 GBP
Retailer 15£353 GBP
Retailer 13£596 GBP
Retailer 8£597 GBP
Retailer 7£739 GBP
Retailer 3£752 GBP
Retailer 6£785 GBP
Retailer 4£993 GBP
Retailer 11£1,058 GBP
Retailer 12£1,339 GBP
Retailer 10£1,381 GBP
Retailer 2£1,538 GBP
Do Amore Diamonds£2,702 GBP
Retailer 5£3,418 GBP

20 data points across 15 retailers

9 retailers£305 GBP to £2,702 GBP

A
Cheapest Retailer
-
£305 GBP
$408 USD
A
Retailer 2
-
£341 GBP
$457 USD
View
B+
Retailer 3
-
£596 GBP
$799 USD
View
A
Retailer 4
-
£597 GBP
$800 USD
View
Retailer 5
-
£1,058 GBP
$1,418 USD
View
Price last confirmed 7 days ago
B+
Retailer 6
-
£1,339 GBP
$1,794 USD
View
B+
Retailer 7
-
£1,381 GBP
$1,850 USD
View
B
Retailer 8
-
£1,538 GBP
View
Most Expensive
B
Do Amore Diamonds
27-A422448BA · Oct 29
£2,702 GBP
$3,620 USD
View
8 more retailers have this diamond
Prices start from £305 GBPSave up to £2,397 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
3.54ct Round
£305 GBP