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Round|Lab Grown|IGI

3.56ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG634434828

Shape and cutting style on the report: Round brilliant

Certificate IGI LG634434828

Diamond specifications and retailer prices

From £541 GBP
$725 USD
As of November 2, 2026
Save £1,526 GBP (74%) vs most expensive(unlock to see where)
14 retailers carry this diamond
Most expensive: £2,067 GBP at Brilliant Earth · As of October 31, 2026
View at Brilliant Earth

About this 3.56ct lab-grown round diamond

This 3.56ct 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 LG634434828 or 634434828. Listed at 14 retailers as of October 31, 2026, with prices from £541 to £2,067, a £1,526 spread on the same certified stone. Brilliant Earth lists it at £2,067. 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

3.56
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.4°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG634434828
Dimensions9.90 × 9.83 × 6.01 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
HEARTS & ARROWS This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
9.90 mm9.83 mm3.56 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG634434828
Side View
Table 57.0%Crown 34.4°Girdle: MediumPavilion 40.8°Culet: NoneDepth 60.9%

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 2
Current: £2,067 GBP|Low: £373 GBP|High: £2,209 GBP|Avg: £954 GBP|-6.4%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
November 2, 2026
Retailer 4£373 GBP
Retailer 3£526 GBP
Retailer 6£541 GBP
Retailer 2£632 GBP
Retailer 12£683 GBP
Retailer 5£724 GBP
Retailer 10£730 GBP
Retailer 11£985 GBP
Retailer 7£1,177 GBP
Retailer 8£1,411 GBP
Retailer 9£1,616 GBP
Brilliant Earth£2,067 GBP

37 data points across 12 retailers

14 retailers£541 GBP to £2,067 GBP

Retailer 1
-
£301 GBP
$403 USD
Price last confirmed 39 days ago
Retailer 2
-
£337 GBP
$452 USD
View
Price last confirmed 39 days ago
Retailer 3
-
£369 GBP
$494 USD
View
Price last confirmed 35 days ago
A
Retailer 4
-
£541 GBP
$725 USD
View
A
Retailer 5
-
£632 GBP
€806 EUR
View
B+
Retailer 6
-
£683 GBP
$915 USD
View
A
Retailer 7
-
£724 GBP
View
A
Retailer 8
-
£730 GBP
$978 USD
View
B+
Retailer 9
-
£985 GBP
$1,320 USD
View
B
Retailer 10
-
£1,177 GBP
$1,577 USD
View
Retailer 11
-
£1,200 GBP
$1,608 USD
View
Price last confirmed 36 days ago
B
Retailer 12
-
£1,411 GBP
$1,890 USD
View
Retailer 13
-
£1,616 GBP
View
Price last confirmed 12 days ago
Most Expensive
B
Brilliant Earth
10434013A · Oct 31
£2,067 GBP
$2,770 USD
View
13 more retailers have this diamond
Prices start from £541 GBPSave up to £1,526 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
3.56ct Round
£541 GBP