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Round|Lab Grown|IGI

3.67ct F SI1 Round Lab Grown Diamond

VG • F/SI1 • IGI LG819655549

Shape and cutting style on the report: Round brilliant

Certificate IGI LG819655549

Diamond specifications and retailer prices

From £281 GBP
$377 USD
As of October 29, 2026
Save £1,622 GBP (85%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £1,903 GBP at Brilliant Earth · As of October 31, 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 very-good cut grade and certified by IGI LG819655549 or 819655549. Listed at 11 retailers as of October 29, 2026, with prices from £281 to £1,903, a £1,622 spread on the same certified stone. Brilliant Earth lists it at £1,903. Cut grade matters more than carat or clarity for visible brilliance. If you can shift budget toward an Excellent or Ideal cut, do it before chasing higher colour or clarity.

The 4Cs

3.67
Carat
F
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33.2°
Pavilion angle41.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG819655549
Dimensions9.77 × 9.90 × 6.09 mm
L/W Ratio1.01
Girdle conditionFaceted
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process Type IIa
Top View
9.77 mm9.90 mm3.67 ctF / SI1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG819655549
Side View
Table 61.0%Crown 33.2°Girdle: MED-STKPavilion 41.9°Culet: NoneDepth 61.8%

Caratlytics Score

How it works →
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 29
Current: £1,903 GBP|Low: £278 GBP|High: £3,567 GBP|Avg: £1,080 GBP|-46.7%
Brilliant Earth
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
November 1, 2026
Retailer 3£281 GBP
Retailer 8£315 GBP
Retailer 2£485 GBP
Retailer 4£560 GBP
Retailer 9£652 GBP
Retailer 7£978 GBP
Retailer 6£981 GBP
Retailer 10£1,122 GBP
Retailer 5£1,371 GBP
Retailer 11£1,415 GBP
Brilliant Earth£1,903 GBP

34 data points across 11 retailers

11 retailers£281 GBP to £1,903 GBP

A
Cheapest Retailer
-
£281 GBP
$377 USD
A
Retailer 2
-
£315 GBP
$422 USD
View
A
Retailer 3
-
£485 GBP
View
A
Retailer 4
-
£560 GBP
€715 EUR
View
B+
Retailer 5
-
£652 GBP
$874 USD
View
B+
Retailer 6
-
£978 GBP
$1,311 USD
View
B+
Retailer 7
-
£981 GBP
$1,315 USD
View
B+
Retailer 8
-
£1,122 GBP
$1,503 USD
View
B+
Retailer 9
-
£1,371 GBP
View
Retailer 10
-
£1,415 GBP
SGD 2,562 SGD
View
Price last confirmed 19 days ago
Most Expensive
B
Brilliant Earth
20802618A · Oct 31
£1,903 GBP
$2,550 USD
View
10 more retailers have this diamond
Prices start from £281 GBPSave up to £1,622 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
£281 GBP