CaratHunter
Plans
Round|Lab Grown|IGI

0.39ct F SI1 Round Lab Grown Diamond

VG • F/SI1 • IGI LG459129378

Shape and cutting style on the report: Round brilliant

Certificate IGI LG459129378

Diamond specifications and retailer prices

From £154 GBP
$207 USD
As of November 1, 2026
Save £612 GBP (80%) vs most expensive(unlock to see where)
10 retailers carry this diamond
Most expensive: £767 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 0.39ct lab-grown round diamond

This 0.39ct lab-grown round sits in the sub-half-carat band, graded F colour (colourless) and SI1 clarity (slightly-included), with a very-good cut grade and certified by IGI LG459129378 or 459129378. Listed at 10 retailers as of November 1, 2026, with prices from £154 to £767, a £612 spread on the same certified stone. MOH London lists it at £767. 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

0.39
Carat
F
Colour
SI1
Clarity
Very Good
Cut

Specifications

CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
Crown angle34.9°
Pavilion angle40.9°
OriginLab Grown
Grading LabIGI
CertificateIGI LG459129378
Dimensions4.75 × 4.73 × 2.82 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
As Grown - No indication of post-growth treatment This Laboratory Grown Diamond was created by High Pressure High Temperature (HPHT) growth process Type II
Top View
4.75 mm4.73 mm0.39 ctF / SI1
OriginLab Grown
CutVery Good
PolishVery Good
SymmetryVery Good
FluorescenceNone
CertificateIGI LG459129378
Side View
Table 64.0%Crown 34.9°Girdle: THN-STKPavilion 40.9°Culet: NoneDepth 59.6%

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: £767 GBP|Low: £148 GBP|High: £775 GBP|Avg: £318 GBP|-0.1%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
November 1, 2026
Retailer 5£154 GBP
Retailer 8£179 GBP
Retailer 4£187 GBP
Retailer 6£191 GBP
Retailer 7£330 GBP
Retailer 2£351 GBP
Retailer 3£376 GBP
MOH London£767 GBP

44 data points across 8 retailers

10 retailers£154 GBP to £767 GBP

A
Cheapest Retailer
-
£154 GBP
$207 USD
B+
Retailer 2
-
£179 GBP
$240 USD
View
B+
Retailer 3
-
£187 GBP
$250 USD
View
Retailer 4
-
£191 GBP
$256 USD
View
Price last confirmed 7 days ago
B+
Retailer 5
-
£191 GBP
$256 USD
View
B
Retailer 6
-
£330 GBP
$442 USD
View
B
Retailer 7
-
£351 GBP
View
B
Retailer 8
-
£376 GBP
€480 EUR
View
B
Retailer 9
-
£615 GBP
$824 USD
View
Most Expensive
B
MOH London
LG459129378 · Nov 1
£767 GBP
View
9 more retailers have this diamond
Prices start from £154 GBPSave up to £612 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
0.39ct Round
£154 GBP