CaratHunter
Plans
Round|Lab Grown|IGI

0.51ct F FL Round Lab Grown Diamond

ID • F/FL • IGI LG811641426

Shape and cutting style on the report: Round brilliant

Certificate IGI LG811641426

Diamond specifications and retailer prices

From £88 GBP
As of November 3, 2026
Save £824 GBP (90%) vs most expensive(unlock to see where)
19 retailers carry this diamond
Most expensive: £913 GBP at MOH London · As of November 2, 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 FL clarity (flawless or internally-flawless), with a top-tier cut grade and certified by IGI LG811641426 or 811641426. Listed at 19 retailers as of November 2, 2026, with prices from £88 to £913, a £824 spread on the same certified stone. MOH London lists it at £913. 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
FL
Clarity
Ideal
Cut

Specifications

CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle33°
Pavilion angle40.4°
OriginLab Grown
Grading LabIGI
CertificateIGI LG811641426
Dimensions5.16 × 5.19 × 3.09 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
5.16 mm5.19 mm0.51 ctF / FL
OriginLab Grown
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG811641426
Side View
Table 58.0%Crown 33°Girdle: MediumPavilion 40.4°Culet: NoneDepth 59.8%

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 3
Current: £913 GBP|Low: £88 GBP|High: £965 GBP|Avg: £281 GBP|-5.5%
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
Retailer 14
Retailer 15
Retailer 16
Retailer 17
Retailer 18
Retailer 19
November 4, 2026
Retailer 15£88 GBP
Retailer 17£99 GBP
Retailer 4£102 GBP
Retailer 6£116 GBP
Retailer 9£121 GBP
Retailer 14£190 GBP
Retailer 8£206 GBP
Retailer 12£212 GBP
Retailer 2£219 GBP
Retailer 7£219 GBP
Retailer 13£221 GBP
Retailer 10£282 GBP
Retailer 3£322 GBP
Retailer 11£333 GBP
Retailer 19£351 GBP
Retailer 5£354 GBP
Retailer 16£392 GBP
Retailer 18£393 GBP
MOH London£913 GBP

35 data points across 19 retailers

19 retailers£88 GBP to £913 GBP

A
Cheapest Retailer
-
£88 GBP
A
Retailer 2
-
£99 GBP
View
Final sale: no returns
A
Retailer 3
-
£102 GBP
View
A
Retailer 4
-
£116 GBP
View
Retailer 5
-
£121 GBP
View
Price last confirmed 10 days ago
A
Retailer 6
-
£190 GBP
View
A
Retailer 7
-
£206 GBP
View
A
Retailer 8
-
£212 GBP
View
A
Retailer 9
-
£219 GBP
View
A
Retailer 10
-
£219 GBP
View
A
Retailer 11
-
£221 GBP
View
B+
Retailer 12
-
£282 GBP
View
B+
Retailer 13
-
£322 GBP
View
B+
Retailer 14
-
£333 GBP
View
B+
Retailer 15
-
£351 GBP
View
B+
Retailer 16
-
£354 GBP
View
B
Retailer 17
-
£392 GBP
View
B+
Retailer 18
-
£393 GBP
View
Most Expensive
B
MOH London
LG811641426 · Nov 2
£913 GBP
View
18 more retailers have this diamond
Prices start from £88 GBPSave up to £824 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
£88 GBP