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Round|Lab Grown|IGI

3.64ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG635425156

Shape and cutting style on the report: Round brilliant

Certificate IGI LG635425156

Diamond specifications and retailer prices

From £970 GBP
CA$1,805 CAD
As of October 30, 2026
Save £312 GBP (24%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £1,282 GBP at The Diamond Guys · As of November 1, 2026
View at The Diamond Guys

About this 3.64ct lab-grown round diamond

This 3.64ct 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 LG635425156 or 635425156. Listed at 2 retailers as of October 30, 2026, with prices from £970 to £1,282, a £312 spread on the same certified stone. The Diamond Guys lists it at £1,282. 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

3.64
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.1°
Pavilion angle40.7°
OriginLab Grown
Grading LabIGI
CertificateIGI LG635425156
Dimensions10.01 × 9.97 × 6.00 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
10.01 mm9.97 mm3.64 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG635425156
Side View
Table 59.0%Crown 34.1°Girdle: MediumPavilion 40.7°Culet: NoneDepth 60.0%

Caratlytics Score

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B+
Very Good
Strong quality and value balance
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Price History

Last verified: Oct 30
Current: £1,593 GBP|Low: £196 GBP|High: £2,381 GBP|Avg: £931 GBP|-4.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
The Diamond Guys
August 3, 2026
Retailer 3£534 GBP
Retailer 5£570 GBP
Retailer 9£651 GBP
Retailer 11£661 GBP
Retailer 6£751 GBP
Retailer 8£798 GBP
Retailer 4£810 GBP
Retailer 7£970 GBP
Retailer 2£1,261 GBP
The Diamond Guys£1,282 GBP
Retailer 1£1,593 GBP
Retailer 10£2,037 GBP

59 data points across 12 retailers

2 retailers£970 GBP to £1,282 GBP

B+
Cheapest Retailer
-
£970 GBP
CA$1,805 CAD
Most Expensive
B
The Diamond Guys
1954434386 · Nov 1
£1,282 GBP
$1,718 USD
View
1 more retailer has this diamond
Prices start from £970 GBPSave up to £312 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+
3.64ct Round
£970 GBP