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Round|Lab Grown|IGI

3.46ct I VS1 Round Lab Grown Diamond

VG • I/VS1 • IGI LG621488357

Shape and cutting style on the report: Round brilliant

Certificate IGI LG621488357

Diamond specifications and retailer prices

From £413 GBP
$554 USD
As of October 29, 2026
Save £1,500 GBP (78%) vs most expensive(unlock to see where)
12 retailers carry this diamond
Most expensive: £1,914 GBP at MOH London · As of October 29, 2026
View at MOH London

About this 3.46ct lab-grown round diamond

This 3.46ct lab-grown round sits in the three to five carat band, graded I colour (near-colourless) and VS1 clarity (very-slightly-included), with a very-good cut grade and certified by IGI LG621488357 or 621488357. Listed at 12 retailers as of October 29, 2026, with prices from £413 to £1,914, a £1,500 spread on the same certified stone. MOH London lists it at £1,914. 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

3.46
Carat
I
Colour
VS1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle37°
Pavilion angle40.8°
OriginLab Grown
Grading LabIGI
CertificateIGI LG621488357
Dimensions9.57 × 9.47 × 6.02 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
9.57 mm9.47 mm3.46 ctI / VS1
OriginLab Grown
CutVery Good
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG621488357
Side View
Table 58.0%Crown 37°Girdle: MED-THKPavilion 40.8°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: Oct 29
Current: £1,914 GBP|Low: £407 GBP|High: £1,927 GBP|Avg: £940 GBP|-0.5%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
October 30, 2026
Retailer 8£413 GBP
Retailer 7£519 GBP
Retailer 5£572 GBP
Retailer 2£611 GBP
Retailer 12£648 GBP
Retailer 13£649 GBP
Retailer 3£772 GBP
Retailer 6£990 GBP
Retailer 11£1,111 GBP
Retailer 9£1,199 GBP
Retailer 10£1,470 GBP
Retailer 4£1,574 GBP
MOH London£1,914 GBP

33 data points across 13 retailers

12 retailers£413 GBP to £1,914 GBP

A
Cheapest Retailer
-
£413 GBP
$554 USD
A
Retailer 2
-
£519 GBP
$695 USD
View
A
Retailer 3
-
£611 GBP
View
B+
Retailer 4
-
£648 GBP
$868 USD
View
B+
Retailer 5
-
£649 GBP
$869 USD
View
B+
Retailer 6
-
£772 GBP
$1,034 USD
View
B+
Retailer 7
-
£990 GBP
ZAR 21,431 ZAR
View
B
Retailer 8
-
£1,111 GBP
$1,488 USD
View
B
Retailer 9
-
£1,199 GBP
$1,607 USD
View
Retailer 10
-
£1,470 GBP
$1,970 USD
View
Price last confirmed 9 days ago
B
Retailer 11
-
£1,574 GBP
$2,108 USD
View
Most Expensive
B
MOH London
LG621488357 · Oct 29
£1,914 GBP
View
11 more retailers have this diamond
Prices start from £413 GBPSave up to £1,500 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
3.46ct Round
£413 GBP