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Round|Lab Grown|IGI

0.51ct F IF Round Lab Grown Diamond

ID • F/IF • IGI LG846661635

Shape and cutting style on the report: Round brilliant

Certificate IGI LG846661635

Diamond specifications and retailer prices

From £138 GBP
$185 USD
As of November 1, 2026
Save £673 GBP (83%) vs most expensive(unlock to see where)
9 retailers carry this diamond
Most expensive: £811 GBP at MOH London · As of November 1, 2026
View at MOH London

About this 0.51ct lab-grown round diamond

This 0.51ct lab-grown round sits in the half to three-quarter carat band, graded F colour (colourless) and IF clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG846661635 or 846661635. Listed at 9 retailers as of November 1, 2026, with prices from £138 to £811, a £673 spread on the same certified stone. MOH London lists it at £811. Flawless clarity in sub-one-carat stones is rarely visible to the naked eye over VS1, so you are paying a meaningful premium for grade rather than appearance.

The 4Cs

0.51
Carat
F
Colour
IF
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle34.1°
Pavilion angle40.6°
OriginLab Grown
Grading LabIGI
CertificateIGI LG846661635
Dimensions5.11 × 5.15 × 3.16 mm
L/W Ratio1.01
Girdle conditionFaceted
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
5.11 mm5.15 mm0.51 ctF / IF
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG846661635
Side View
Table 56.0%Crown 34.1°Girdle: MediumPavilion 40.6°Culet: NoneDepth 61.5%

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: Nov 1
Current: £811 GBP|Low: £138 GBP|High: £1,045 GBP|Avg: £316 GBP|-22.3%
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
November 2, 2026
Retailer 9£138 GBP
Retailer 8£186 GBP
Retailer 6£187 GBP
Retailer 2£191 GBP
Retailer 3£202 GBP
Retailer 5£269 GBP
Retailer 4£269 GBP
Retailer 7£356 GBP
MOH London£811 GBP

15 data points across 9 retailers

9 retailers£138 GBP to £811 GBP

A
Cheapest Retailer
-
£138 GBP
$185 USD
A
Retailer 2
-
£186 GBP
€237 EUR
View
A
Retailer 3
-
£187 GBP
$251 USD
View
A
Retailer 4
-
£191 GBP
View
A
Retailer 5
-
£202 GBP
$270 USD
View
B+
Retailer 6
-
£269 GBP
$360 USD
View
B+
Retailer 7
-
£269 GBP
$361 USD
View
B+
Retailer 8
-
£356 GBP
$477 USD
View
Most Expensive
B
MOH London
LG846661635 · Nov 1
£811 GBP
View
8 more retailers have this diamond
Prices start from £138 GBPSave up to £673 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
0.51ct Round
£138 GBP