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3.67ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG818699936

Shape and cutting style on the report: Round brilliant

Certificate IGI LG818699936

Diamond specifications and retailer prices

From £615 GBP
As of October 27, 2026
Save £1,289 GBP (68%) vs most expensive(unlock to see where)
2 retailers carry this diamond
Most expensive: £1,903 GBP at Brilliant Earth · As of October 27, 2026
View at Brilliant Earth

About this 3.67ct lab-grown round diamond

This 3.67ct 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 LG818699936 or 818699936. Listed at 2 retailers as of October 27, 2026, with prices from £615 to £1,903, a £1,289 spread on the same certified stone. Brilliant Earth lists it at £1,903. 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

3.67
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.3°
Pavilion angle41.5°
OriginLab Grown
Grading LabIGI
CertificateIGI LG818699936
Dimensions9.87 × 9.90 × 6.11 mm
L/W Ratio1.00
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.87 mm9.90 mm3.67 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG818699936
Side View
Table 59.0%Crown 34.3°Girdle: MED-STKPavilion 41.5°Culet: NoneDepth 61.8%

Caratlytics Score

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A
Excellent
Excellent quality and great value
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Price History

Last verified: Oct 27
Current: £1,903 GBP|Low: £308 GBP|High: £1,903 GBP|Avg: £828 GBP
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
October 27, 2026
Retailer 3£308 GBP
Retailer 4£531 GBP
Retailer 2£615 GBP
Brilliant Earth£1,903 GBP

28 data points across 4 retailers

2 retailers£615 GBP to £1,903 GBP

A
Cheapest Retailer
-
£615 GBP
Most Expensive
B
Brilliant Earth
21228328A · Oct 27
£1,903 GBP
$2,550 USD
View
1 more retailer has this diamond
Prices start from £615 GBPSave up to £1,289 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
3.67ct Round
£615 GBP