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3.66ct F SI1 Round Lab Grown Diamond

ID • F/SI1 • IGI LG611370735

Shape and cutting style on the report: Round brilliant

Certificate IGI LG611370735

Diamond specifications and retailer prices

From £343 GBP
$460 USD
As of October 27, 2026
Save £2,377 GBP (87%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £2,720 GBP at Do Amore Diamonds · As of October 29, 2026
View at Do Amore Diamonds

About this 3.66ct lab-grown round diamond

This 3.66ct 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 LG611370735 or 611370735. Listed at 10 retailers as of October 27, 2026, with prices from £343 to £2,720, a £2,377 spread on the same certified stone. Do Amore Diamonds lists it at £2,720. 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

3.66
Carat
F
Colour
SI1
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle32.8°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG611370735
Dimensions10.03 × 9.93 × 5.97 mm
L/W Ratio1.01
Girdle conditionFaceted
Culet sizePointed
Cert comments
This Laboratory Grown Diamond was created by Chemical Vapor Deposition (CVD) growth process and may include post-growth treatment Type IIa
Top View
10.03 mm9.93 mm3.66 ctF / SI1
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG611370735
Side View
Table 59.0%Crown 32.8°Girdle: Med.Pavilion 40.8°Culet: NoneDepth 59.9%

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: Oct 27
Current: £2,720 GBP|Low: £251 GBP|High: £2,787 GBP|Avg: £1,065 GBP|-2.4%
Do Amore Diamonds
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
October 29, 2026
Retailer 13£306 GBP
Retailer 8£343 GBP
Retailer 3£351 GBP
Retailer 11£601 GBP
Retailer 7£604 GBP
Retailer 5£719 GBP
Retailer 6£774 GBP
Retailer 4£795 GBP
Retailer 12£970 GBP
Retailer 9£1,065 GBP
Retailer 10£1,347 GBP
Retailer 2£1,547 GBP
Retailer 14£1,885 GBP
Do Amore Diamonds£2,720 GBP

23 data points across 14 retailers

10 retailers£343 GBP to £2,720 GBP

Retailer 1
-
£306 GBP
$411 USD
Price last confirmed 7 days ago
A
Retailer 2
-
£343 GBP
$460 USD
View
B+
Retailer 3
-
£601 GBP
$806 USD
View
A
Retailer 4
-
£604 GBP
$810 USD
View
B+
Retailer 5
-
£970 GBP
$1,301 USD
View
Retailer 6
-
£1,065 GBP
$1,429 USD
View
Price last confirmed 7 days ago
B+
Retailer 7
-
£1,347 GBP
$1,807 USD
View
B
Retailer 8
-
£1,547 GBP
View
B
Retailer 9
-
£1,885 GBP
$2,530 USD
View
Most Expensive
B
Do Amore Diamonds
27-6F588CD1B · Oct 29
£2,720 GBP
$3,650 USD
View
9 more retailers have this diamond
Prices start from £343 GBPSave up to £2,377 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
3.66ct Round
£343 GBP