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Round|Lab Grown|IGI

3.66ct H VS1 Round Lab Grown Diamond

EX • H/VS1 • IGI LG620415346

Shape and cutting style on the report: Round brilliant

Certificate IGI LG620415346

Diamond specifications and retailer prices

From £350 GBP
$470 USD
As of November 1, 2026
Save £1,245 GBP (78%) vs most expensive(unlock to see where)
11 retailers carry this diamond
Most expensive: £1,596 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 3.66ct lab-grown round diamond

This 3.66ct lab-grown round sits in the three to five carat band, graded H colour (near-colourless) and VS1 clarity (very-slightly-included), with a top-tier cut grade and certified by IGI LG620415346 or 620415346. Listed at 11 retailers as of November 1, 2026, with prices from £350 to £1,596, a £1,245 spread on the same certified stone. MOH London lists it at £1,596. Lab-grown prices in the 2ct and up range have fallen 40 to 60% over the last 18 months. Use the cross-retailer spread above to find the lowest current listing.

The 4Cs

3.66
Carat
H
Colour
VS1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle35.6°
Pavilion angle41.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG620415346
Dimensions9.75 × 9.71 × 6.14 mm
L/W Ratio1.00
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
9.75 mm9.71 mm3.66 ctH / VS1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG620415346
Side View
Table 60.0%Crown 35.6°Girdle: ThickPavilion 41.6°Culet: NoneDepth 63.1%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: £1,596 GBP|Low: £350 GBP|High: £2,062 GBP|Avg: £1,084 GBP|-1.2%
MOH London
Retailer 2
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Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
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Retailer 17
November 2, 2026
Retailer 13£350 GBP
Retailer 15£392 GBP
Retailer 16£553 GBP
Retailer 9£616 GBP
Retailer 2£637 GBP
Retailer 14£679 GBP
Retailer 11£682 GBP
Retailer 6£899 GBP
Retailer 10£917 GBP
Retailer 8£1,043 GBP
Retailer 12£1,168 GBP
Retailer 3£1,207 GBP
Retailer 4£1,488 GBP
Retailer 17£1,595 GBP
MOH London£1,596 GBP
Retailer 7£2,005 GBP
Retailer 5£2,062 GBP

22 data points across 17 retailers

11 retailers£350 GBP to £1,596 GBP

A
Cheapest Retailer
-
£350 GBP
$470 USD
A
Retailer 2
-
£392 GBP
$526 USD
View
Final sale: no returns
A
Retailer 3
-
£392 GBP
$526 USD
View
A
Retailer 4
-
£553 GBP
HK$5,800 HKD
View
A
Retailer 5
-
£637 GBP
€814 EUR
View
B+
Retailer 6
-
£679 GBP
$911 USD
View
A
Retailer 7
-
£682 GBP
$915 USD
View
B+
Retailer 8
-
£917 GBP
A$1,894 AUD
View
B+
Retailer 9
-
£1,168 GBP
$1,567 USD
View
B
Retailer 10
-
£1,396 GBP
$1,873 USD
View
Most Expensive
B
MOH London
LG620415346 · Nov 1
£1,596 GBP
View
10 more retailers have this diamond
Prices start from £350 GBPSave up to £1,245 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
£350 GBP