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Round|Lab Grown|IGI

3.51ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG750598099

Shape and cutting style on the report: Round brilliant

Certificate IGI LG750598099

Diamond specifications and retailer prices

From £885 GBP
A$1,828 AUD
As of November 2, 2026
2 retailers carry this diamond
Most expensive: £1,506 GBP at Rare Carat · As of August 16, 2026
View at Rare Carat

About this 3.51ct lab-grown round diamond

This 3.51ct 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 LG750598099 or 750598099. Listed at 2 retailers as of November 2, 2026. 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
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.9°
Pavilion angle41.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG750598099
Dimensions9.78 × 9.75 × 6.01 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.78 mm9.75 mm3.51 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG750598099
Side View
Table 59.0%Crown 34.9°Girdle: MediumPavilion 41.3°Culet: NoneDepth 61.5%

Caratlytics Score

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

Price History

Last verified: Nov 2
Current: £1,506 GBP|Low: £385 GBP|High: £1,816 GBP|Avg: £1,018 GBP|-17.0%
Rare Carat
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
October 16, 2026
Retailer 2£385 GBP
Retailer 5£522 GBP
Retailer 7£604 GBP
Retailer 10£608 GBP
Retailer 6£660 GBP
Retailer 3£885 GBP
Retailer 8£931 GBP
Retailer 4£959 GBP
Retailer 9£1,274 GBP
Rare Carat£1,506 GBP

82 data points across 10 retailers

2 retailers

B+
Cheapest Retailer
-
£885 GBP
A$1,828 AUD
Most Expensive
Rare Carat
HS-51-29A_l_750598099 · Aug 16
£1,506 GBP
$2,022 USD
View
Price last confirmed 78 days ago
1 more retailer has this diamond
Prices start from £885 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+
3.51ct Round
£885 GBP